initial commit

.gitignore

@@ -0,0 +1,45 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.build/
+.buildlog/
+.history
+.svn/
+.swiftpm/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins-dependencies
+.pub-cache/
+.pub/
+/build/
+/coverage/
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release

.metadata

@@ -0,0 +1,45 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: "9f455d2486bcb28cad87b062475f42edc959f636"
+  channel: "stable"
+
+project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: 9f455d2486bcb28cad87b062475f42edc959f636
+      base_revision: 9f455d2486bcb28cad87b062475f42edc959f636
+    - platform: android
+      create_revision: 9f455d2486bcb28cad87b062475f42edc959f636
+      base_revision: 9f455d2486bcb28cad87b062475f42edc959f636
+    - platform: ios
+      create_revision: 9f455d2486bcb28cad87b062475f42edc959f636
+      base_revision: 9f455d2486bcb28cad87b062475f42edc959f636
+    - platform: linux
+      create_revision: 9f455d2486bcb28cad87b062475f42edc959f636
+      base_revision: 9f455d2486bcb28cad87b062475f42edc959f636
+    - platform: macos
+      create_revision: 9f455d2486bcb28cad87b062475f42edc959f636
+      base_revision: 9f455d2486bcb28cad87b062475f42edc959f636
+    - platform: web
+      create_revision: 9f455d2486bcb28cad87b062475f42edc959f636
+      base_revision: 9f455d2486bcb28cad87b062475f42edc959f636
+    - platform: windows
+      create_revision: 9f455d2486bcb28cad87b062475f42edc959f636
+      base_revision: 9f455d2486bcb28cad87b062475f42edc959f636
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'

CLAUDE.md

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+# CLAUDE.md - MeshCore SAR App Technical Reference
+
+This document provides technical details for AI assistants (like Claude) working with this codebase.
+
+## Project Overview
+
+**Type**: Flutter Mobile Application
+**Purpose**: Search and Rescue (SAR) operations with MeshCore mesh network devices
+**Architecture**: Provider-based state management with BLE communication
+**Target Platforms**: iOS 13+, Android 5.0+ (API 21+)
+
+## Project Structure
+
+```
+lib/
+├── models/              # Data models
+│   ├── contact.dart            # Contact with telemetry
+│   ├── contact_telemetry.dart  # GPS, battery, temperature
+│   ├── message.dart            # Messages and SAR markers
+│   ├── sar_marker.dart         # SAR tactical markers
+│   ├── device_info.dart        # BLE device connection state
+│   └── map_layer.dart          # Map tile layer definitions
+├── services/            # Business logic services
+│   ├── meshcore_ble_service.dart      # BLE communication
+│   ├── meshcore_constants.dart        # Protocol constants
+│   ├── buffer_reader.dart             # Binary protocol reader
+│   ├── buffer_writer.dart             # Binary protocol writer
+│   ├── cayenne_lpp_parser.dart        # Telemetry decoder
+│   └── tile_cache_service.dart        # Offline map tiles
+├── providers/           # State management
+│   ├── connection_provider.dart       # BLE connection state
+│   ├── contacts_provider.dart         # Contact list management
+│   ├── messages_provider.dart         # Message history + SAR markers
+│   ├── map_provider.dart              # Map navigation state
+│   └── app_provider.dart              # Coordinator provider
+├── screens/             # UI screens
+│   ├── home_screen.dart        # Main screen with tabs
+│   ├── messages_tab.dart       # Message list view
+│   ├── contacts_tab.dart       # Contact list view
+│   └── map_tab.dart            # Interactive map view
+├── widgets/             # Reusable UI components
+│   └── map_markers.dart        # Custom map marker widgets
+├── utils/               # Utilities
+│   └── sar_message_parser.dart # Parse S:<emoji>:lat,lon format
+└── main.dart            # App entry point
+```
+
+## Key Technologies
+
+### Core Dependencies
+- **flutter_blue_plus** (^2.0.0): BLE communication
+- **flutter_map** (^8.2.2): Interactive mapping with OpenStreetMap
+- **flutter_map_tile_caching** (^10.1.1): Offline map tile storage
+- **provider** (^6.1.0): State management
+- **latlong2** (^0.9.0): GPS coordinate handling
+- **geolocator** (^14.0.2): Precise GPS location tracking
+- **permission_handler** (^12.0.1): Runtime permissions
+
+### MeshCore Protocol
+
+The app implements the MeshCore BLE protocol based on https://github.com/meshcore-dev/meshcore.js
+
+**BLE Service**: `6E400001-B5A3-F393-E0A9-E50E24DCCA9E`
+**RX Characteristic** (write): `6E400002-B5A3-F393-E0A9-E50E24DCCA9E`
+**TX Characteristic** (notify): `6E400003-B5A3-F393-E0A9-E50E24DCCA9E`
+
+#### Command Codes (Client → Device)
+- `4`: Get contacts list
+- `2`: Send text message
+- `39`: Request telemetry
+
+#### Response Codes (Device → Client)
+- `3`: Contact information
+- `7`: Message received
+- `0x8B` (139): Telemetry response (Cayenne LPP format)
+
+#### Binary Protocol Format
+
+All protocol messages use little-endian byte order.
+
+**Get Contacts Request**:
+```
+[0x04] - Command code
+```
+
+**Contact Response**:
+```
+[0x03] - Response code
+[32 bytes] - Public key
+[1 byte] - Contact type (0=none, 1=chat, 2=repeater, 3=room)
+[64 bytes] - Advertised name (null-terminated string)
+[4 bytes] - Latitude (int32, divide by 10000 for degrees)
+[4 bytes] - Longitude (int32, divide by 10000 for degrees)
+```
+
+**Message Received**:
+```
+[0x07] - Response code
+[1 byte] - Message type (0=contact, 1=channel)
+[4 bytes] - Sender public key prefix
+[4 bytes] - Recipient public key prefix
+[2 bytes] - Text length (uint16)
+[N bytes] - UTF-8 text
+```
+
+**Send Text Message**:
+```
+[0x02] - Command code
+[32 bytes] - Recipient public key
+[2 bytes] - Text length (uint16)
+[N bytes] - UTF-8 text
+```
+
+**Request Telemetry**:
+```
+[0x27] (39) - Command code
+[32 bytes] - Contact public key
+```
+
+**Telemetry Response**:
+```
+[0x8B] (139) - Response code
+[4 bytes] - Contact public key prefix
+[N bytes] - Cayenne LPP payload
+```
+
+### Cayenne LPP Format
+
+Telemetry data uses Cayenne Low Power Payload format:
+
+```
+[Channel] [Type] [Data...]
+```
+
+**Supported Types**:
+- `136` (0x88): GPS Location
+  - 4 bytes: Latitude (int32, divide by 10000)
+  - 4 bytes: Longitude (int32, divide by 10000)
+  - 4 bytes: Altitude (int32, divide by 100)
+- `103` (0x67): Temperature Sensor
+  - 2 bytes: Temperature (int16, divide by 10 for °C)
+- `2` (0x02): Analog Input (used for battery voltage)
+  - 2 bytes: Value (uint16, divide by 100 for volts)
+
+### SAR Message Format
+
+Special tactical markers embedded in messages:
+
+```
+S:<emoji>:<latitude>,<longitude>
+```
+
+**Recognized Emojis**:
+- `🧑` or `👤`: Found Person
+- `🔥`: Fire Location
+- `🏕️` or `⛺`: Staging Area
+
+**Examples**:
+- `S:🧑:46.0569,14.5058` - Person found at coordinates
+- `S:🔥:46.0570,14.5060` - Fire detected
+- `S:🏕️:46.0571,14.5062` - Base camp location
+
+**Parsing Rules**:
+- Must start with `S:`
+- Single emoji character after first colon
+- Comma-separated lat,lon after second colon
+- Coordinates can be negative (e.g., `-12.3456`)
+- No spaces allowed in format
+
+## State Management Architecture
+
+### Provider Hierarchy
+
+```
+MultiProvider
+├── ConnectionProvider      # BLE connection state
+├── ContactsProvider        # Contact list
+├── MessagesProvider        # Messages + SAR markers
+├── MapProvider            # Map navigation
+└── AppProvider            # Coordinator (uses all above)
+```
+
+### Event Flow
+
+```
+BLE Device → MeshCoreBleService → ConnectionProvider → AppProvider
+                                         ↓
+                                    ContactsProvider
+                                    MessagesProvider
+                                         ↓
+                                        UI
+```
+
+**Example: Receiving a Message**
+
+1. BLE device sends message via TX characteristic
+2. `MeshCoreBleService._onDataReceived()` parses binary data
+3. Calls `onMessageReceived` callback
+4. `ConnectionProvider` receives message
+5. `AppProvider` enhances message (check for SAR format)
+6. `MessagesProvider.addMessage()` stores message
+7. UI rebuilds via `Consumer<MessagesProvider>`
+
+### Contact Types
+
+```dart
+enum ContactType {
+  none(0),      // Unknown/invalid
+  chat(1),      // Team member (shown on map)
+  repeater(2),  // Network repeater node
+  room(3),      // Communication channel/room
+}
+```
+
+**Map Display Rules**:
+- Only `ContactType.chat` contacts with valid GPS are shown on map
+- Repeaters and rooms are listed in Contacts tab but not mapped
+
+## Map Implementation
+
+### Tile Layers
+
+Three tile sources are supported via `MapLayer` enum:
+
+1. **OpenStreetMap** (default)
+   - URL: `https://tile.openstreetmap.org/{z}/{x}/{y}.png`
+   - Max zoom: 19
+   - Best for street-level navigation
+
+2. **OpenTopoMap**
+   - URL: `https://a.tile.opentopomap.org/{z}/{x}/{y}.png`
+   - Max zoom: 17
+   - Shows topographic features, elevation contours
+
+3. **ESRI World Imagery**
+   - URL: `https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}`
+   - Max zoom: 19
+   - Satellite imagery
+
+### Offline Tile Caching
+
+Uses `flutter_map_tile_caching` with ObjectBox backend:
+
+```dart
+// Initialize cache
+await FMTCObjectBoxBackend().initialise();
+final store = FMTCStore('meshcore_sar_tiles');
+await store.manage.create();
+
+// Download region
+final region = RectangleRegion(bounds);
+await store.download.startForeground(region: region);
+```
+
+**Cache Behavior**:
+- `CacheBehavior.cacheFirst`: Use cached tiles if available
+- 30-day validity period
+- Automatic background updates when online
+
+### Map Markers
+
+**Team Member Markers** (Blue):
+- CircleAvatar with person icon
+- Battery percentage badge at top
+- Name label at bottom
+- Tap to show details dialog
+
+**SAR Event Markers** (Color-coded):
+- Found Person: Green with 🧑
+- Fire: Red with 🔥
+- Staging Area: Orange with 🏕️
+- Time ago label at top
+- Type label at bottom
+- Tap to show details dialog
+
+### Map Navigation
+
+**Navigation from Messages Tab**:
+1. User taps SAR marker message
+2. `MapProvider.navigateToLocation()` called
+3. Target location and zoom stored in provider
+4. Tab switches to Map
+5. `MapTab._handleMapNavigation()` moves map
+6. `MapProvider.clearNavigation()` resets state
+
+**Zoom State Preservation**:
+- Current zoom stored in `MapProvider`
+- Maintained across tab switches
+- Updated on user zoom gestures
+
+### User Location Tracking
+
+The app tracks the user's precise GPS location in real-time:
+
+**Permission Setup** (iOS Info.plist):
+```xml
+<key>NSLocationWhenInUseUsageDescription</key>
+<string>MeshCore SAR needs location access to display team members and SAR markers on the map</string>
+<key>NSLocationTemporaryPreciseUsageDescription</key>
+<string>MeshCore SAR needs precise location for accurate positioning in SAR operations</string>
+<key>NSLocationDefaultAccuracyReduced</key>
+<false/>
+```
+
+**Implementation** (lib/screens/map_tab.dart):
+```dart
+Position? _currentPosition;
+bool _trackingLocation = false;
+
+// Request permission and start tracking
+final position = await Geolocator.getCurrentPosition(
+  locationSettings: const LocationSettings(
+    accuracy: LocationAccuracy.best,
+    distanceFilter: 0,
+  ),
+);
+
+// Listen to continuous position updates
+Geolocator.getPositionStream(
+  locationSettings: const LocationSettings(
+    accuracy: LocationAccuracy.best,
+    distanceFilter: 10, // Update every 10 meters
+  ),
+).listen((Position position) {
+  setState(() => _currentPosition = position);
+  if (_trackingLocation) {
+    // Auto-center map on user location
+    _mapController.move(
+      LatLng(position.latitude, position.longitude),
+      _mapController.camera.zoom
+    );
+  }
+});
+```
+
+**User Location Marker**:
+- Blue pulsing circle showing current position
+- Navigation icon indicating heading
+- Tap location button to center map on user
+- Tap again to enable tracking mode (map follows user movement)
+
+### Map Legend
+
+**Collapsible Legend** (lib/screens/map_tab.dart):
+- Shows counts of team members and SAR markers
+- Click to collapse to compact view
+- Click again to expand
+- Positioned in top-right corner
+
+```dart
+bool _showLegend = true;
+
+GestureDetector(
+  onTap: () => setState(() => _showLegend = !_showLegend),
+  child: _showLegend
+      ? _MapLegend(/* full legend with all counts */)
+      : Card(
+          child: Column([
+            Text('Legend'),
+            Icon(Icons.expand_more),
+          ]),
+        ),
+)
+```
+
+## Building and Development
+
+### Development Commands
+
+```bash
+# Install dependencies
+flutter pub get
+
+# Run in debug mode
+flutter run
+
+# Run with specific device
+flutter run -d <device-id>
+
+# Hot reload (during debug)
+# Press 'r' in terminal
+
+# Hot restart (during debug)
+# Press 'R' in terminal
+
+# Analyze code
+flutter analyze
+
+# Run tests
+flutter test
+
+# Format code
+dart format lib/
+
+# Clean build
+flutter clean
+```
+
+### iOS Build
+
+```bash
+# Open Xcode workspace
+open ios/Runner.xcworkspace
+
+# Build from command line
+flutter build ios --release
+
+# Create IPA (requires signing)
+flutter build ipa
+```
+
+**Key iOS Files**:
+- `ios/Runner/Info.plist`: Permissions and app configuration
+- `ios/Podfile`: CocoaPods dependencies
+- `ios/Runner.xcodeproj`: Xcode project
+
+### Android Build
+
+```bash
+# Debug APK
+flutter build apk --debug
+
+# Release APK
+flutter build apk --release
+
+# App Bundle (for Play Store)
+flutter build appbundle --release
+
+# Split APKs by ABI
+flutter build apk --split-per-abi
+```
+
+**Key Android Files**:
+- `android/app/src/main/AndroidManifest.xml`: Permissions and app configuration
+- `android/app/build.gradle`: App-level build configuration
+- `android/build.gradle`: Project-level build configuration
+
+## Common Development Tasks
+
+### Adding a New BLE Command
+
+1. **Add command code** to `lib/services/meshcore_constants.dart`:
+   ```dart
+   static const int cmdYourCommand = 42;
+   ```
+
+2. **Create command method** in `lib/services/meshcore_ble_service.dart`:
+   ```dart
+   Future<void> yourCommand() async {
+     final writer = BufferWriter();
+     writer.writeByte(MeshCoreConstants.cmdYourCommand);
+     await _sendCommand(writer.toBytes());
+   }
+   ```
+
+3. **Handle response** in `_onDataReceived()`:
+   ```dart
+   case MeshCoreConstants.respYourResponse:
+     // Parse response data
+     onYourCallback?.call(data);
+     break;
+   ```
+
+### Adding a New SAR Marker Type
+
+1. **Update enum** in `lib/models/sar_marker.dart`:
+   ```dart
+   enum SarMarkerType {
+     // existing types...
+     yourType('🆕', 'Your Type');
+   }
+   ```
+
+2. **Add to parser** in `lib/utils/sar_message_parser.dart`:
+   ```dart
+   case '🆕':
+     return SarMarkerType.yourType;
+   ```
+
+3. **Add color** in `lib/widgets/map_markers.dart`:
+   ```dart
+   case SarMarkerType.yourType:
+     return Colors.purple;
+   ```
+
+4. **Update providers** in `lib/providers/messages_provider.dart`:
+   ```dart
+   List<SarMarker> get yourTypeMarkers =>
+       sarMarkers.where((m) => m.type == SarMarkerType.yourType).toList();
+   ```
+
+### Adding a New Map Layer
+
+1. **Add to model** in `lib/models/map_layer.dart`:
+   ```dart
+   static const yourLayer = MapLayer(
+     type: MapLayerType.yourLayer,
+     name: 'Your Layer',
+     urlTemplate: 'https://your-tile-server/{z}/{x}/{y}.png',
+     attribution: '© Your Attribution',
+     maxZoom: 19,
+   );
+   ```
+
+2. **Add to list**:
+   ```dart
+   static const List<MapLayer> allLayers = [
+     openStreetMap,
+     openTopoMap,
+     esriWorldImagery,
+     yourLayer, // Add here
+   ];
+   ```
+
+3. Layer automatically appears in layer selector UI
+
+## Testing
+
+### Unit Tests
+
+```bash
+# Run all tests
+flutter test
+
+# Run specific test file
+flutter test test/widget_test.dart
+
+# Run with coverage
+flutter test --coverage
+```
+
+### Integration Tests
+
+```bash
+# Run integration tests
+flutter drive --target=test_driver/app.dart
+```
+
+### Manual Testing Checklist
+
+**BLE Connection**:
+- [ ] Scan discovers MeshCore devices
+- [ ] Connection successful
+- [ ] Device info displayed in status bar
+- [ ] Disconnect works properly
+
+**Contacts**:
+- [ ] Contacts load after connection
+- [ ] Contacts grouped by type
+- [ ] Telemetry request works
+- [ ] Battery/GPS displayed correctly
+
+**Messages**:
+- [ ] Messages received and displayed
+- [ ] SAR markers highlighted
+- [ ] Tap SAR marker navigates to map
+- [ ] Message timestamps correct
+
+**Map**:
+- [ ] Map loads and displays tiles
+- [ ] Team member markers appear
+- [ ] SAR markers appear with correct colors
+- [ ] Layer switching works
+- [ ] Zoom/pan gestures work
+- [ ] Marker tap shows details
+- [ ] Offline tiles load
+
+## Troubleshooting
+
+### BLE Issues
+
+**"Bluetooth adapter not available"**:
+- Check device Bluetooth is on
+- Verify permissions granted
+- iOS: Check Info.plist has usage descriptions
+- Android: Check AndroidManifest.xml has permissions
+
+**"Connection failed"**:
+- Device must support BLE
+- Check service UUID matches
+- Verify device is in range (<10m typically)
+- Try scanning again
+
+### Runtime Issues
+
+**MissingPluginException for geolocator or other plugins**:
+
+Example error:
+```
+MissingPluginException(No implementation found for method isLocationServiceEnabled
+on channel flutter.baseflow.com/geolocator_apple)
+```
+
+This occurs when native plugin implementations aren't properly installed. Common after adding new dependencies.
+
+**Solution**:
+```bash
+# For iOS
+cd ios
+pod install
+cd ..
+
+# Clean and rebuild
+flutter clean
+flutter pub get
+flutter run
+```
+
+**If still failing on iOS**:
+```bash
+cd ios
+rm Podfile.lock
+rm -rf Pods/
+pod install
+cd ..
+flutter clean
+flutter pub get
+```
+
+### Build Issues
+
+**iOS Pod Install Fails**:
+```bash
+cd ios
+rm Podfile.lock
+rm -rf Pods/
+pod install --repo-update
+cd ..
+```
+
+**CocoaPods ObjectBox Version Conflict**:
+
+This error occurs when flutter_map_tile_caching updates its ObjectBox dependency but the cached Podfile.lock has an older version:
+
+```
+[!] CocoaPods could not find compatible versions for pod "ObjectBox":
+  In snapshot (Podfile.lock): ObjectBox (= 1.9.2)
+  In Podfile: objectbox_flutter_libs depends on ObjectBox (= 4.4.1)
+```
+
+**Solution**:
+```bash
+# Navigate to iOS directory
+cd ios
+
+# Remove cached dependency lock file
+rm Podfile.lock
+
+# Remove all installed pods
+rm -rf Pods/
+
+# Update CocoaPods repository (this may take a few minutes)
+pod repo update
+
+# Reinstall all pods with updated versions
+pod install
+
+# Return to project root
+cd ..
+
+# Clean Flutter build cache
+flutter clean
+
+# Reinstall Flutter dependencies
+flutter pub get
+
+# Run the app
+flutter run
+```
+
+**Alternative solution** (if the above doesn't work):
+```bash
+cd ios
+rm Podfile.lock
+rm -rf Pods/
+pod deintegrate
+pod cache clean --all
+pod setup
+pod install
+cd ..
+flutter clean
+flutter pub get
+```
+
+**Note**: The `pod repo update` command can take 5-10 minutes as it downloads the entire CocoaPods specifications repository. This is normal.
+
+**Android Gradle Timeout**:
+```gradle
+// android/gradle.properties
+org.gradle.daemon=true
+org.gradle.parallel=true
+org.gradle.jvmargs=-Xmx4096m
+```
+
+**Flutter Version Conflicts**:
+```bash
+flutter channel stable
+flutter upgrade
+flutter pub upgrade
+```
+
+## Performance Optimization
+
+### BLE Communication
+- Buffer incoming data to handle partial packets
+- Throttle telemetry requests (max 1 per second per contact)
+- Use `notifyListeners()` sparingly in providers
+
+### Map Performance
+- Limit visible markers (cluster if >100 markers)
+- Use `repaint boundary` for marker widgets
+- Implement marker virtualization for large datasets
+
+### Memory Management
+- Dispose controllers in `dispose()` methods
+- Clear message history after 1000 messages
+- Implement tile cache size limits
+
+## Security Considerations
+
+- **BLE**: No authentication in current protocol - add encryption for production
+- **Permissions**: Request minimum required permissions
+- **Data**: No sensitive data should be logged
+- **Network**: Use HTTPS for all tile sources
+
+## Future Enhancements
+
+Potential features to add:
+
+1. **Message Sending**: UI to compose and send messages
+2. **Route Recording**: Track team member paths over time
+3. **Geofencing**: Alerts when team members enter/exit areas
+4. **Voice Notes**: Attach audio to SAR markers
+5. **Team Chat**: Real-time chat between team members
+6. **Mission Plans**: Pre-loaded search patterns
+7. **Statistics**: Coverage analysis, search time tracking
+
+## References
+
+- [Flutter Documentation](https://docs.flutter.dev/)
+- [flutter_blue_plus API](https://pub.dev/documentation/flutter_blue_plus/)
+- [flutter_map Documentation](https://docs.fleaflet.dev/)
+- [MeshCore Protocol](https://github.com/meshcore-dev/meshcore.js)
+- [Cayenne LPP Specification](https://developers.mydevices.com/cayenne/docs/lora/#lora-cayenne-low-power-payload)
+- [Provider Package](https://pub.dev/packages/provider)
+
+## Contact
+
+For questions or contributions, please refer to the project repository or contact the development team.

README.md

@@ -0,0 +1,343 @@
+# MeshCore SAR App
+
+A Flutter-based Search and Rescue (SAR) application that communicates with MeshCore mesh network devices via Bluetooth Low Energy (BLE).
+
+## Features
+
+- **Real-time Messaging**: Receive and display messages from MeshCore mesh network
+- **Contact Management**: Track team members, repeaters, and communication channels
+- **SAR Markers**: Special location markers for found persons, fires, and staging areas
+- **Interactive Map**: View team locations and SAR markers on an interactive map with multiple layer options:
+  - OpenStreetMap (default)
+  - OpenTopoMap (topographic)
+  - ESRI World Imagery (satellite)
+- **Offline Support**: Map tiles cached for offline operation
+- **Telemetry Tracking**: Monitor battery levels, GPS locations, and temperature for all contacts
+- **BLE Communication**: Direct connection to MeshCore devices via Bluetooth
+
+## Prerequisites
+
+Before building the app, ensure you have:
+
+- Flutter SDK 3.19.0 or higher
+- Dart SDK 3.3.0 or higher
+- Xcode 15+ (for iOS builds)
+- Android Studio with Android SDK (for Android builds)
+- CocoaPods (for iOS dependencies)
+
+### Install Flutter
+
+If you haven't installed Flutter yet:
+
+```bash
+# macOS/Linux
+git clone https://github.com/flutter/flutter.git -b stable
+export PATH="$PATH:`pwd`/flutter/bin"
+
+# Verify installation
+flutter doctor
+```
+
+## Setup
+
+1. **Clone the repository**:
+   ```bash
+   cd /path/to/meshcore-sar/meshcore_sar_app
+   ```
+
+2. **Install dependencies**:
+   ```bash
+   flutter pub get
+   ```
+
+3. **Verify setup**:
+   ```bash
+   flutter doctor
+   ```
+   Fix any issues reported by Flutter Doctor before proceeding.
+
+## Building and Running
+
+### iOS
+
+#### Requirements
+- macOS computer
+- Xcode 15 or higher
+- Apple Developer account (for physical device deployment)
+- iOS device with iOS 13.0 or higher
+
+#### Steps
+
+1. **Open iOS folder in Xcode**:
+   ```bash
+   open ios/Runner.xcworkspace
+   ```
+
+2. **Configure signing**:
+   - In Xcode, select the Runner project
+   - Go to "Signing & Capabilities"
+   - Select your development team
+   - Xcode will automatically handle provisioning
+
+3. **Connect your iOS device** via USB
+
+4. **Enable Developer Mode** on your iOS device:
+   - Settings → Privacy & Security → Developer Mode → Enable
+
+5. **Trust your Mac** on the iOS device when prompted
+
+6. **Run the app**:
+   ```bash
+   # Run in debug mode
+   flutter run
+
+   # Or build release
+   flutter build ios --release
+   ```
+
+7. **Install on device from Xcode**:
+   - Select your device in Xcode
+   - Click the "Run" button (▶️)
+
+#### Common iOS Issues
+
+**Problem**: "Runner has conflicting provisioning settings"
+```bash
+# Solution: Clean and rebuild
+cd ios
+pod deintegrate
+pod install
+cd ..
+flutter clean
+flutter pub get
+```
+
+**Problem**: Bluetooth permissions not working
+- Ensure `Info.plist` contains all required permission keys
+- Check that permissions are requested at runtime
+
+### Android
+
+#### Requirements
+- Android Studio installed
+- Android SDK 21 (Android 5.0) or higher
+- Physical Android device or emulator
+
+#### Steps
+
+1. **Enable Developer Options** on your Android device:
+   - Settings → About Phone → Tap "Build Number" 7 times
+   - Go back → Developer Options → Enable "USB Debugging"
+
+2. **Connect your Android device** via USB and authorize the computer
+
+3. **Verify device connection**:
+   ```bash
+   flutter devices
+   ```
+
+4. **Run the app**:
+   ```bash
+   # Run in debug mode
+   flutter run
+
+   # Or specify device
+   flutter run -d <device-id>
+   ```
+
+5. **Build APK**:
+   ```bash
+   # Debug APK
+   flutter build apk --debug
+
+   # Release APK
+   flutter build apk --release
+
+   # App Bundle (for Play Store)
+   flutter build appbundle --release
+   ```
+
+   The APK will be located at:
+   - Debug: `build/app/outputs/flutter-apk/app-debug.apk`
+   - Release: `build/app/outputs/flutter-apk/app-release.apk`
+
+6. **Install APK manually**:
+   ```bash
+   # Install on connected device
+   flutter install
+
+   # Or use adb
+   adb install build/app/outputs/flutter-apk/app-release.apk
+   ```
+
+#### Common Android Issues
+
+**Problem**: Gradle build fails
+```bash
+# Solution: Clean and rebuild
+flutter clean
+cd android
+./gradlew clean
+cd ..
+flutter pub get
+flutter build apk
+```
+
+**Problem**: Bluetooth permissions denied
+- Ensure all Bluetooth permissions are in `AndroidManifest.xml`
+- For Android 12+, request `BLUETOOTH_SCAN` and `BLUETOOTH_CONNECT` at runtime
+
+**Problem**: "Execution failed for task ':app:minifyReleaseWithR8'"
+```bash
+# Add to android/app/build.gradle
+android {
+    buildTypes {
+        release {
+            minifyEnabled false
+        }
+    }
+}
+```
+
+## Running on Emulator/Simulator
+
+### iOS Simulator
+
+```bash
+# List available simulators
+flutter emulators
+
+# Launch a simulator
+flutter emulators --launch <simulator-id>
+
+# Run app
+flutter run
+```
+
+**Note**: BLE functionality will not work on iOS Simulator. Use a physical device for testing.
+
+### Android Emulator
+
+```bash
+# List available emulators
+flutter emulators
+
+# Create new emulator in Android Studio:
+# Tools → Device Manager → Create Virtual Device
+
+# Launch emulator
+flutter emulators --launch <emulator-id>
+
+# Run app
+flutter run
+```
+
+**Note**: BLE functionality requires specific emulator setup or physical device.
+
+## Permissions
+
+The app requires the following permissions:
+
+### iOS (ios/Runner/Info.plist)
+- `NSBluetoothAlwaysUsageDescription`: Bluetooth access for MeshCore devices
+- `NSLocationWhenInUseUsageDescription`: Location access for map features
+
+### Android (android/app/src/main/AndroidManifest.xml)
+- `BLUETOOTH_SCAN`: Scan for BLE devices
+- `BLUETOOTH_CONNECT`: Connect to BLE devices
+- `ACCESS_FINE_LOCATION`: Required for BLE scanning
+- `INTERNET`: Download map tiles
+
+## Usage
+
+1. **Connect to MeshCore Device**:
+   - Tap "Connect" in the status bar
+   - Select your MeshCore device from the scan results
+   - Wait for connection confirmation
+
+2. **View Messages**:
+   - Messages tab shows all received messages
+   - SAR marker messages are highlighted
+   - Tap SAR marker to view on map
+
+3. **Manage Contacts**:
+   - Contacts tab shows team members, repeaters, and channels
+   - Tap contact to view details
+   - Use refresh button to request telemetry updates
+
+4. **View Map**:
+   - Map tab displays team locations and SAR markers
+   - Tap layer selector to switch between map styles
+   - Use zoom controls or pinch gestures
+   - Tap markers for details
+   - Tap items in bottom list to navigate
+
+## SAR Marker Format
+
+Messages can contain SAR markers using this format:
+```
+S:<emoji>:<latitude>,<longitude>
+```
+
+Examples:
+- `S:🧑:46.0569,14.5058` - Found person
+- `S:🔥:46.0570,14.5060` - Fire location
+- `S:🏕️:46.0571,14.5062` - Staging area
+
+## Architecture
+
+- **Models**: Data structures for contacts, messages, markers, telemetry
+- **Services**: BLE communication, tile caching, protocol parsing
+- **Providers**: State management using Provider pattern
+- **Screens**: UI components for messages, contacts, map
+- **Widgets**: Reusable UI elements like map markers
+
+## Dependencies
+
+Key packages used:
+- `flutter_blue_plus`: BLE communication
+- `flutter_map`: Interactive mapping
+- `flutter_map_tile_caching`: Offline map tiles
+- `provider`: State management
+- `latlong2`: GPS coordinate handling
+- `permission_handler`: Runtime permissions
+
+## Troubleshooting
+
+### App crashes on launch
+```bash
+flutter clean
+flutter pub get
+flutter run
+```
+
+### BLE not working
+- Ensure Bluetooth is enabled on device
+- Check that all permissions are granted
+- Verify MeshCore device is powered on and in range
+
+### Map tiles not loading
+- Check internet connection
+- Verify tile URLs are accessible
+- Clear tile cache and reload
+
+### Build errors
+```bash
+# Complete clean rebuild
+flutter clean
+cd ios && pod deintegrate && pod install && cd ..
+cd android && ./gradlew clean && cd ..
+flutter pub get
+flutter run
+```
+
+## License
+
+This project is for Search and Rescue operations using MeshCore mesh network devices.
+
+## Support
+
+For issues related to:
+- **Flutter**: https://flutter.dev/community
+- **MeshCore Protocol**: https://github.com/meshcore-dev/meshcore.js
+- **App Issues**: Open an issue in this repository

analysis_options.yaml

@@ -0,0 +1,28 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at https://dart.dev/lints.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

android/.gitignore

@@ -0,0 +1,14 @@
+gradle-wrapper.jar
+/.gradle
+/captures/
+/gradlew
+/gradlew.bat
+/local.properties
+GeneratedPluginRegistrant.java
+.cxx/
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/to/reference-keystore
+key.properties
+**/*.keystore
+**/*.jks

android/app/build.gradle.kts

@@ -0,0 +1,44 @@
+plugins {
+    id("com.android.application")
+    id("kotlin-android")
+    // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
+    id("dev.flutter.flutter-gradle-plugin")
+}
+
+android {
+    namespace = "com.meshcore.sar.meshcore_sar_app"
+    compileSdk = flutter.compileSdkVersion
+    ndkVersion = flutter.ndkVersion
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_11
+        targetCompatibility = JavaVersion.VERSION_11
+    }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_11.toString()
+    }
+
+    defaultConfig {
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId = "com.meshcore.sar.meshcore_sar_app"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://flutter.dev/to/review-gradle-config.
+        minSdk = flutter.minSdkVersion
+        targetSdk = flutter.targetSdkVersion
+        versionCode = flutter.versionCode
+        versionName = flutter.versionName
+    }
+
+    buildTypes {
+        release {
+            // TODO: Add your own signing config for the release build.
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig = signingConfigs.getByName("debug")
+        }
+    }
+}
+
+flutter {
+    source = "../.."
+}

android/app/src/debug/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,59 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- Bluetooth permissions -->
+    <uses-permission android:name="android.permission.BLUETOOTH" android:maxSdkVersion="30" />
+    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" android:maxSdkVersion="30" />
+    <uses-permission android:name="android.permission.BLUETOOTH_SCAN" android:usesPermissionFlags="neverForLocation" />
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
+
+    <!-- Location permissions -->
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
+
+    <!-- Internet for map tiles -->
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+
+    <application
+        android:label="meshcore_sar_app"
+        android:name="${applicationName}"
+        android:icon="@mipmap/ic_launcher">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:launchMode="singleTop"
+            android:taskAffinity=""
+            android:theme="@style/LaunchTheme"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:hardwareAccelerated="true"
+            android:windowSoftInputMode="adjustResize">
+            <!-- Specifies an Android theme to apply to this Activity as soon as
+                 the Android process has started. This theme is visible to the user
+                 while the Flutter UI initializes. After that, this theme continues
+                 to determine the Window background behind the Flutter UI. -->
+            <meta-data
+              android:name="io.flutter.embedding.android.NormalTheme"
+              android:resource="@style/NormalTheme"
+              />
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+        <!-- Don't delete the meta-data below.
+             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
+        <meta-data
+            android:name="flutterEmbedding"
+            android:value="2" />
+    </application>
+    <!-- Required to query activities that can process text, see:
+         https://developer.android.com/training/package-visibility and
+         https://developer.android.com/reference/android/content/Intent#ACTION_PROCESS_TEXT.
+
+         In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
+    <queries>
+        <intent>
+            <action android:name="android.intent.action.PROCESS_TEXT"/>
+            <data android:mimeType="text/plain"/>
+        </intent>
+    </queries>
+</manifest>

android/app/src/main/kotlin/com/meshcore/sar/meshcore_sar_app/MainActivity.kt

@@ -0,0 +1,5 @@
+package com.meshcore.sar.meshcore_sar_app
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity : FlutterActivity()

android/app/src/main/res/drawable-v21/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="?android:colorBackground" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

android/app/src/main/res/drawable/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@android:color/white" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

android/app/src/main/res/values-night/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

android/app/src/main/res/values/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

android/app/src/profile/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

android/build.gradle.kts

@@ -0,0 +1,24 @@
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+val newBuildDir: Directory =
+    rootProject.layout.buildDirectory
+        .dir("../../build")
+        .get()
+rootProject.layout.buildDirectory.value(newBuildDir)
+
+subprojects {
+    val newSubprojectBuildDir: Directory = newBuildDir.dir(project.name)
+    project.layout.buildDirectory.value(newSubprojectBuildDir)
+}
+subprojects {
+    project.evaluationDependsOn(":app")
+}
+
+tasks.register<Delete>("clean") {
+    delete(rootProject.layout.buildDirectory)
+}

android/gradle.properties

@@ -0,0 +1,3 @@
+org.gradle.jvmargs=-Xmx8G -XX:MaxMetaspaceSize=4G -XX:ReservedCodeCacheSize=512m -XX:+HeapDumpOnOutOfMemoryError
+android.useAndroidX=true
+android.enableJetifier=true

android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-all.zip

android/settings.gradle.kts

@@ -0,0 +1,26 @@
+pluginManagement {
+    val flutterSdkPath =
+        run {
+            val properties = java.util.Properties()
+            file("local.properties").inputStream().use { properties.load(it) }
+            val flutterSdkPath = properties.getProperty("flutter.sdk")
+            require(flutterSdkPath != null) { "flutter.sdk not set in local.properties" }
+            flutterSdkPath
+        }
+
+    includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")
+
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+plugins {
+    id("dev.flutter.flutter-plugin-loader") version "1.0.0"
+    id("com.android.application") version "8.9.1" apply false
+    id("org.jetbrains.kotlin.android") version "2.1.0" apply false
+}
+
+include(":app")

ios/.gitignore

@@ -0,0 +1,34 @@
+**/dgph
+*.mode1v3
+*.mode2v3
+*.moved-aside
+*.pbxuser
+*.perspectivev3
+**/*sync/
+.sconsign.dblite
+.tags*
+**/.vagrant/
+**/DerivedData/
+Icon?
+**/Pods/
+**/.symlinks/
+profile
+xcuserdata
+**/.generated/
+Flutter/App.framework
+Flutter/Flutter.framework
+Flutter/Flutter.podspec
+Flutter/Generated.xcconfig
+Flutter/ephemeral/
+Flutter/app.flx
+Flutter/app.zip
+Flutter/flutter_assets/
+Flutter/flutter_export_environment.sh
+ServiceDefinitions.json
+Runner/GeneratedPluginRegistrant.*
+
+# Exceptions to above rules.
+!default.mode1v3
+!default.mode2v3
+!default.pbxuser
+!default.perspectivev3

ios/Flutter/AppFrameworkInfo.plist

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>App</string>
+  <key>CFBundleIdentifier</key>
+  <string>io.flutter.flutter.app</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>App</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>1.0</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>1.0</string>
+  <key>MinimumOSVersion</key>
+  <string>13.0</string>
+</dict>
+</plist>

ios/Flutter/Debug.xcconfig

@@ -0,0 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include "Generated.xcconfig"

ios/Flutter/Release.xcconfig

@@ -0,0 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include "Generated.xcconfig"

ios/Podfile

@@ -0,0 +1,43 @@
+# Uncomment this line to define a global platform for your project
+# platform :ios, '13.0'
+
+# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
+ENV['COCOAPODS_DISABLE_STATS'] = 'true'
+
+project 'Runner', {
+  'Debug' => :debug,
+  'Profile' => :release,
+  'Release' => :release,
+}
+
+def flutter_root
+  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
+  unless File.exist?(generated_xcode_build_settings_path)
+    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
+  end
+
+  File.foreach(generated_xcode_build_settings_path) do |line|
+    matches = line.match(/FLUTTER_ROOT\=(.*)/)
+    return matches[1].strip if matches
+  end
+  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
+end
+
+require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
+
+flutter_ios_podfile_setup
+
+target 'Runner' do
+  use_frameworks!
+
+  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
+  target 'RunnerTests' do
+    inherit! :search_paths
+  end
+end
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    flutter_additional_ios_build_settings(target)
+  end
+end

ios/Podfile.lock

@@ -0,0 +1,118 @@
+PODS:
+  - DKImagePickerController/Core (4.3.9):
+    - DKImagePickerController/ImageDataManager
+    - DKImagePickerController/Resource
+  - DKImagePickerController/ImageDataManager (4.3.9)
+  - DKImagePickerController/PhotoGallery (4.3.9):
+    - DKImagePickerController/Core
+    - DKPhotoGallery
+  - DKImagePickerController/Resource (4.3.9)
+  - DKPhotoGallery (0.0.19):
+    - DKPhotoGallery/Core (= 0.0.19)
+    - DKPhotoGallery/Model (= 0.0.19)
+    - DKPhotoGallery/Preview (= 0.0.19)
+    - DKPhotoGallery/Resource (= 0.0.19)
+    - SDWebImage
+    - SwiftyGif
+  - DKPhotoGallery/Core (0.0.19):
+    - DKPhotoGallery/Model
+    - DKPhotoGallery/Preview
+    - SDWebImage
+    - SwiftyGif
+  - DKPhotoGallery/Model (0.0.19):
+    - SDWebImage
+    - SwiftyGif
+  - DKPhotoGallery/Preview (0.0.19):
+    - DKPhotoGallery/Model
+    - DKPhotoGallery/Resource
+    - SDWebImage
+    - SwiftyGif
+  - DKPhotoGallery/Resource (0.0.19):
+    - SDWebImage
+    - SwiftyGif
+  - file_picker (0.0.1):
+    - DKImagePickerController/PhotoGallery
+    - Flutter
+  - Flutter (1.0.0)
+  - flutter_blue_plus_darwin (0.0.2):
+    - Flutter
+    - FlutterMacOS
+  - geolocator_apple (1.2.0):
+    - Flutter
+    - FlutterMacOS
+  - ObjectBox (4.4.1)
+  - objectbox_flutter_libs (0.0.1):
+    - Flutter
+    - ObjectBox (= 4.4.1)
+  - package_info_plus (0.4.5):
+    - Flutter
+  - path_provider_foundation (0.0.1):
+    - Flutter
+    - FlutterMacOS
+  - permission_handler_apple (9.3.0):
+    - Flutter
+  - SDWebImage (5.21.3):
+    - SDWebImage/Core (= 5.21.3)
+  - SDWebImage/Core (5.21.3)
+  - share_plus (0.0.1):
+    - Flutter
+  - SwiftyGif (5.4.5)
+
+DEPENDENCIES:
+  - file_picker (from `.symlinks/plugins/file_picker/ios`)
+  - Flutter (from `Flutter`)
+  - flutter_blue_plus_darwin (from `.symlinks/plugins/flutter_blue_plus_darwin/darwin`)
+  - geolocator_apple (from `.symlinks/plugins/geolocator_apple/darwin`)
+  - objectbox_flutter_libs (from `.symlinks/plugins/objectbox_flutter_libs/ios`)
+  - package_info_plus (from `.symlinks/plugins/package_info_plus/ios`)
+  - path_provider_foundation (from `.symlinks/plugins/path_provider_foundation/darwin`)
+  - permission_handler_apple (from `.symlinks/plugins/permission_handler_apple/ios`)
+  - share_plus (from `.symlinks/plugins/share_plus/ios`)
+
+SPEC REPOS:
+  trunk:
+    - DKImagePickerController
+    - DKPhotoGallery
+    - ObjectBox
+    - SDWebImage
+    - SwiftyGif
+
+EXTERNAL SOURCES:
+  file_picker:
+    :path: ".symlinks/plugins/file_picker/ios"
+  Flutter:
+    :path: Flutter
+  flutter_blue_plus_darwin:
+    :path: ".symlinks/plugins/flutter_blue_plus_darwin/darwin"
+  geolocator_apple:
+    :path: ".symlinks/plugins/geolocator_apple/darwin"
+  objectbox_flutter_libs:
+    :path: ".symlinks/plugins/objectbox_flutter_libs/ios"
+  package_info_plus:
+    :path: ".symlinks/plugins/package_info_plus/ios"
+  path_provider_foundation:
+    :path: ".symlinks/plugins/path_provider_foundation/darwin"
+  permission_handler_apple:
+    :path: ".symlinks/plugins/permission_handler_apple/ios"
+  share_plus:
+    :path: ".symlinks/plugins/share_plus/ios"
+
+SPEC CHECKSUMS:
+  DKImagePickerController: 946cec48c7873164274ecc4624d19e3da4c1ef3c
+  DKPhotoGallery: b3834fecb755ee09a593d7c9e389d8b5d6deed60
+  file_picker: a0560bc09d61de87f12d246fc47d2119e6ef37be
+  Flutter: cabc95a1d2626b1b06e7179b784ebcf0c0cde467
+  flutter_blue_plus_darwin: 20a08bfeaa0f7804d524858d3d8744bcc1b6dbc3
+  geolocator_apple: ab36aa0e8b7d7a2d7639b3b4e48308394e8cef5e
+  ObjectBox: 7da4aceb5013d041bfafdbc6d744a26918b09757
+  objectbox_flutter_libs: 09b1dec1b4cd27bf1a5f9bae7ccaa7e43588bf31
+  package_info_plus: af8e2ca6888548050f16fa2f1938db7b5a5df499
+  path_provider_foundation: 080d55be775b7414fd5a5ef3ac137b97b097e564
+  permission_handler_apple: 4ed2196e43d0651e8ff7ca3483a069d469701f2d
+  SDWebImage: 16309af6d214ba3f77a7c6f6fdda888cb313a50a
+  share_plus: 50da8cb520a8f0f65671c6c6a99b3617ed10a58a
+  SwiftyGif: 706c60cf65fa2bc5ee0313beece843c8eb8194d4
+
+PODFILE CHECKSUM: 3c63482e143d1b91d2d2560aee9fb04ecc74ac7e
+
+COCOAPODS: 1.16.2

ios/Runner.xcodeproj/project.pbxproj

@@ -0,0 +1,749 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 54;
+	objects = {
+
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+/* End PBXBuildFile section */
+
+/* Begin PBXContainerItemProxy section */
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+			proxyType = 1;
+			remoteGlobalIDString = 97C146ED1CF9000F007C117D;
+			remoteInfo = Runner;
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+/* End PBXContainerItemProxy section */
+
+/* Begin PBXCopyFilesBuildPhase section */
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+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
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+			dstSubfolderSpec = 10;
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+			name = "Embed Frameworks";
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+		};
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+		};
+/* End PBXFrameworksBuildPhase section */
+
+/* Begin PBXGroup section */
+		331C8082294A63A400263BE5 /* RunnerTests */ = {
+			isa = PBXGroup;
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+			);
+			path = RunnerTests;
+			sourceTree = "<group>";
+		};
+		3C28992F8CC08CA6C1F157CE /* Pods */ = {
+			isa = PBXGroup;
+			children = (
+				0A6847CB76DAC5A39547F092 /* Pods-Runner.debug.xcconfig */,
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+				3B8CF791ABE83A2374700CB3 /* Pods-Runner.profile.xcconfig */,
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+				2FF0A626EBAC324A9D2CD7C8 /* Pods-RunnerTests.release.xcconfig */,
+				11010AF1B9B58058CB45D836 /* Pods-RunnerTests.profile.xcconfig */,
+			);
+			name = Pods;
+			path = Pods;
+			sourceTree = "<group>";
+		};
+		9740EEB11CF90186004384FC /* Flutter */ = {
+			isa = PBXGroup;
+			children = (
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+				9740EEB31CF90195004384FC /* Generated.xcconfig */,
+			);
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+			sourceTree = "<group>";
+		};
+		97C146E51CF9000F007C117D = {
+			isa = PBXGroup;
+			children = (
+				9740EEB11CF90186004384FC /* Flutter */,
+				97C146F01CF9000F007C117D /* Runner */,
+				97C146EF1CF9000F007C117D /* Products */,
+				331C8082294A63A400263BE5 /* RunnerTests */,
+				3C28992F8CC08CA6C1F157CE /* Pods */,
+				9C44871016BF8D8E5F823EE9 /* Frameworks */,
+			);
+			sourceTree = "<group>";
+		};
+		97C146EF1CF9000F007C117D /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				97C146EE1CF9000F007C117D /* Runner.app */,
+				331C8081294A63A400263BE5 /* RunnerTests.xctest */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
+		97C146F01CF9000F007C117D /* Runner */ = {
+			isa = PBXGroup;
+			children = (
+				97C146FA1CF9000F007C117D /* Main.storyboard */,
+				97C146FD1CF9000F007C117D /* Assets.xcassets */,
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+				97C147021CF9000F007C117D /* Info.plist */,
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+				1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */,
+				74858FAE1ED2DC5600515810 /* AppDelegate.swift */,
+				74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */,
+			);
+			path = Runner;
+			sourceTree = "<group>";
+		};
+		9C44871016BF8D8E5F823EE9 /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				95A961E69DFB3804DF041D16 /* Pods_Runner.framework */,
+				5E125ECD1538D6FD469DAD40 /* Pods_RunnerTests.framework */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
+/* End PBXGroup section */
+
+/* Begin PBXNativeTarget section */
+		331C8080294A63A400263BE5 /* RunnerTests */ = {
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+				63128E4122D07543FBC5706D /* Frameworks */,
+			);
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+			);
+			dependencies = (
+				331C8086294A63A400263BE5 /* PBXTargetDependency */,
+			);
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+			productName = RunnerTests;
+			productReference = 331C8081294A63A400263BE5 /* RunnerTests.xctest */;
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+		};
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+			buildConfigurationList = 97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */;
+			buildPhases = (
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+				97C146EC1CF9000F007C117D /* Resources */,
+				9705A1C41CF9048500538489 /* Embed Frameworks */,
+				3B06AD1E1E4923F5004D2608 /* Thin Binary */,
+				0F5356670725D838348C6698 /* [CP] Embed Pods Frameworks */,
+				86AE9F22272E851DF6253AA1 /* [CP] Copy Pods Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = Runner;
+			productName = Runner;
+			productReference = 97C146EE1CF9000F007C117D /* Runner.app */;
+			productType = "com.apple.product-type.application";
+		};
+/* End PBXNativeTarget section */
+
+/* Begin PBXProject section */
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+			isa = PBXProject;
+			attributes = {
+				BuildIndependentTargetsInParallel = YES;
+				LastUpgradeCheck = 1510;
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+					331C8080294A63A400263BE5 = {
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+			buildConfigurationList = 97C146E91CF9000F007C117D /* Build configuration list for PBXProject "Runner" */;
+			compatibilityVersion = "Xcode 9.3";
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+			hasScannedForEncodings = 0;
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+			buildActionMask = 2147483647;
+			files = (
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+			);
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+		};
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+}

ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>

ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>

ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

@@ -0,0 +1,101 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1510"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+               BuildableName = "Runner.app"
+               BlueprintName = "Runner"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      customLLDBInitFile = "$(SRCROOT)/Flutter/ephemeral/flutter_lldbinit"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <Testables>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "331C8080294A63A400263BE5"
+               BuildableName = "RunnerTests.xctest"
+               BlueprintName = "RunnerTests"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      customLLDBInitFile = "$(SRCROOT)/Flutter/ephemeral/flutter_lldbinit"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      enableGPUValidationMode = "1"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Profile"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

ios/Runner.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:Runner.xcodeproj">
+   </FileRef>
+   <FileRef
+      location = "group:Pods/Pods.xcodeproj">
+   </FileRef>
+</Workspace>

ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>

ios/Runner/AppDelegate.swift

@@ -0,0 +1,13 @@
+import Flutter
+import UIKit
+
+@main
+@objc class AppDelegate: FlutterAppDelegate {
+  override func application(
+    _ application: UIApplication,
+    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
+  ) -> Bool {
+    GeneratedPluginRegistrant.register(with: self)
+    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
+  }
+}

ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,122 @@
+{
+  "images" : [
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-20x20@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-20x20@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-40x40@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-40x40@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-60x60@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-60x60@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-20x20@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-20x20@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-29x29@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-29x29@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-40x40@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-40x40@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-76x76@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-76x76@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "83.5x83.5",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-83.5x83.5@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "1024x1024",
+      "idiom" : "ios-marketing",
+      "filename" : "Icon-App-1024x1024@1x.png",
+      "scale" : "1x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md

@@ -0,0 +1,5 @@
+# Launch Screen Assets
+
+You can customize the launch screen with your own desired assets by replacing the image files in this directory.
+
+You can also do it by opening your Flutter project's Xcode project with `open ios/Runner.xcworkspace`, selecting `Runner/Assets.xcassets` in the Project Navigator and dropping in the desired images.

ios/Runner/Base.lproj/LaunchScreen.storyboard

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12121" systemVersion="16G29" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12089"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="Ydg-fD-yQy"/>
+                        <viewControllerLayoutGuide type="bottom" id="xbc-2k-c8Z"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <imageView opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" image="LaunchImage" translatesAutoresizingMaskIntoConstraints="NO" id="YRO-k0-Ey4">
+                            </imageView>
+                        </subviews>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="1a2-6s-vTC"/>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="centerY" secondItem="Ze5-6b-2t3" secondAttribute="centerY" id="4X2-HB-R7a"/>
+                        </constraints>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53" y="375"/>
+        </scene>
+    </scenes>
+    <resources>
+        <image name="LaunchImage" width="168" height="185"/>
+    </resources>
+</document>

ios/Runner/Base.lproj/Main.storyboard

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10117" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
+    </dependencies>
+    <scenes>
+        <!--Flutter View Controller-->
+        <scene sceneID="tne-QT-ifu">
+            <objects>
+                <viewController id="BYZ-38-t0r" customClass="FlutterViewController" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
+                        <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
+                        <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+            </objects>
+        </scene>
+    </scenes>
+</document>

ios/Runner/Info.plist

@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleDisplayName</key>
+	<string>Meshcore Sar App</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>meshcore_sar_app</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>$(FLUTTER_BUILD_NAME)</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>$(FLUTTER_BUILD_NUMBER)</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>UIMainStoryboardFile</key>
+	<string>Main</string>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>CADisableMinimumFrameDurationOnPhone</key>
+	<true/>
+	<key>UIApplicationSupportsIndirectInputEvents</key>
+	<true/>
+	<key>NSBluetoothAlwaysUsageDescription</key>
+	<string>MeshCore SAR needs Bluetooth to communicate with MeshCore devices for Search &amp; Rescue operations</string>
+	<key>NSBluetoothPeripheralUsageDescription</key>
+	<string>MeshCore SAR needs Bluetooth to communicate with MeshCore devices</string>
+	<key>NSLocationWhenInUseUsageDescription</key>
+	<string>MeshCore SAR needs location access to display team members and SAR markers on the map</string>
+	<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
+	<string>MeshCore SAR needs location access for offline map functionality during field operations</string>
+	<key>NSLocationTemporaryPreciseUsageDescription</key>
+	<string>MeshCore SAR needs precise location for accurate positioning in SAR operations</string>
+	<key>NSLocationDefaultAccuracyReduced</key>
+	<false/>
+</dict>
+</plist>

ios/Runner/Runner-Bridging-Header.h

@@ -0,0 +1 @@
+#import "GeneratedPluginRegistrant.h"

ios/RunnerTests/RunnerTests.swift

@@ -0,0 +1,12 @@
+import Flutter
+import UIKit
+import XCTest
+
+class RunnerTests: XCTestCase {
+
+  func testExample() {
+    // If you add code to the Runner application, consider adding tests here.
+    // See https://developer.apple.com/documentation/xctest for more information about using XCTest.
+  }
+
+}

ios/build/ios/XCBuildData/PIFCache/target/TARGET@v11_hash=05bac65c1874bef27c6481ddee5e5db7-json

@@ -0,0 +1 @@
+{"buildConfigurations":[{"baseConfigurationFileReference":"bfdfe7dc352907fc980b868725387e98db4168bc813778add322f796c1886948","buildSettings":{"CODE_SIGNING_ALLOWED":"NO","CODE_SIGNING_IDENTITY":"-","CODE_SIGNING_REQUIRED":"NO","CONFIGURATION_BUILD_DIR":"$(BUILD_DIR)/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)/geolocator_apple","EXPANDED_CODE_SIGN_IDENTITY":"-","IBSC_MODULE":"geolocator_apple","INFOPLIST_FILE":"Target Support Files/geolocator_apple/ResourceBundle-geolocator_apple_privacy-geolocator_apple-Info.plist","IPHONEOS_DEPLOYMENT_TARGET":"11.0","ONLY_ACTIVE_ARCH":"NO","PRODUCT_NAME":"geolocator_apple_privacy","SDKROOT":"iphoneos","SKIP_INSTALL":"YES","TARGETED_DEVICE_FAMILY":"1,2","WRAPPER_EXTENSION":"bundle"},"guid":"bfdfe7dc352907fc980b868725387e984f90d418214f372cb5652188b6c03ab7","name":"Debug"},{"baseConfigurationFileReference":"bfdfe7dc352907fc980b868725387e98eaf9cc3cd0e4bd5b5081a977e6dd395a","buildSettings":{"CLANG_ENABLE_OBJC_WEAK":"NO","CODE_SIGNING_ALLOWED":"NO","CODE_SIGNING_IDENTITY":"-","CODE_SIGNING_REQUIRED":"NO","CONFIGURATION_BUILD_DIR":"$(BUILD_DIR)/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)/geolocator_apple","EXPANDED_CODE_SIGN_IDENTITY":"-","IBSC_MODULE":"geolocator_apple","INFOPLIST_FILE":"Target Support Files/geolocator_apple/ResourceBundle-geolocator_apple_privacy-geolocator_apple-Info.plist","IPHONEOS_DEPLOYMENT_TARGET":"11.0","PRODUCT_NAME":"geolocator_apple_privacy","SDKROOT":"iphoneos","SKIP_INSTALL":"YES","TARGETED_DEVICE_FAMILY":"1,2","VALIDATE_PRODUCT":"YES","WRAPPER_EXTENSION":"bundle"},"guid":"bfdfe7dc352907fc980b868725387e98ef1f6c2c0471787bb8c754d246f4e6f8","name":"Profile"},{"baseConfigurationFileReference":"bfdfe7dc352907fc980b868725387e98eaf9cc3cd0e4bd5b5081a977e6dd395a","buildSettings":{"CODE_SIGNING_ALLOWED":"NO","CODE_SIGNING_IDENTITY":"-","CODE_SIGNING_REQUIRED":"NO","CONFIGURATION_BUILD_DIR":"$(BUILD_DIR)/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)/geolocator_apple","EXPANDED_CODE_SIGN_IDENTITY":"-","IBSC_MODULE":"geolocator_apple","INFOPLIST_FILE":"Target Support Files/geolocator_apple/ResourceBundle-geolocator_apple_privacy-geolocator_apple-Info.plist","IPHONEOS_DEPLOYMENT_TARGET":"11.0","PRODUCT_NAME":"geolocator_apple_privacy","SDKROOT":"iphoneos","SKIP_INSTALL":"YES","TARGETED_DEVICE_FAMILY":"1,2","WRAPPER_EXTENSION":"bundle"},"guid":"bfdfe7dc352907fc980b868725387e98e7e407f8bb5172b2db2019bb528593a9","name":"Release"}],"buildPhases":[{"buildFiles":[],"guid":"bfdfe7dc352907fc980b868725387e9884f731f5ac95fb5b060ee50b794122f2","type":"com.apple.buildphase.sources"},{"buildFiles":[],"guid":"bfdfe7dc352907fc980b868725387e982ce1691e61b20960a2ea685395560596","type":"com.apple.buildphase.frameworks"},{"buildFiles":[{"fileReference":"bfdfe7dc352907fc980b868725387e982d53e45b4eb2667e94d388d54e1ed196","guid":"bfdfe7dc352907fc980b868725387e98276a88038657a871d360f4cbfebc876d"}],"guid":"bfdfe7dc352907fc980b868725387e98cd4b69f26505cfa442ef066f8d043cc4","type":"com.apple.buildphase.resources"}],"buildRules":[],"dependencies":[],"guid":"bfdfe7dc352907fc980b868725387e98e1aba8ff8dc833f2269ce0a7182533b3","name":"geolocator_apple-geolocator_apple_privacy","productReference":{"guid":"bfdfe7dc352907fc980b868725387e980ae07e1806c3af2f5550d2e89780c766","name":"geolocator_apple_privacy.bundle","type":"product"},"productTypeIdentifier":"com.apple.product-type.bundle","provisioningSourceData":[{"bundleIdentifierFromInfoPlist":"${PRODUCT_BUNDLE_IDENTIFIER}","configurationName":"Debug","provisioningStyle":0},{"bundleIdentifierFromInfoPlist":"${PRODUCT_BUNDLE_IDENTIFIER}","configurationName":"Profile","provisioningStyle":0},{"bundleIdentifierFromInfoPlist":"${PRODUCT_BUNDLE_IDENTIFIER}","configurationName":"Release","provisioningStyle":0}],"type":"standard"}

ios/build/ios/XCBuildData/PIFCache/target/TARGET@v11_hash=3567e32d075e7ae442ecbd6e7e1204e9-json

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lib/main.dart

@@ -0,0 +1,104 @@
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'providers/connection_provider.dart';
+import 'providers/contacts_provider.dart';
+import 'providers/messages_provider.dart';
+import 'providers/map_provider.dart';
+import 'providers/app_provider.dart';
+import 'services/tile_cache_service.dart';
+import 'screens/home_screen.dart';
+
+void main() {
+  runApp(const MeshCoreSarApp());
+}
+
+class MeshCoreSarApp extends StatelessWidget {
+  const MeshCoreSarApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MultiProvider(
+      providers: [
+        // Core providers
+        ChangeNotifierProvider(create: (_) => ConnectionProvider()),
+        ChangeNotifierProvider(create: (_) => ContactsProvider()),
+        ChangeNotifierProvider(create: (_) => MessagesProvider()),
+        ChangeNotifierProvider(create: (_) => MapProvider()),
+
+        // Tile cache service
+        Provider(create: (_) => TileCacheService()),
+
+        // App provider that coordinates everything
+        ChangeNotifierProxyProvider4<ConnectionProvider, ContactsProvider,
+            MessagesProvider, TileCacheService, AppProvider>(
+          create: (context) => AppProvider(
+            connectionProvider: context.read<ConnectionProvider>(),
+            contactsProvider: context.read<ContactsProvider>(),
+            messagesProvider: context.read<MessagesProvider>(),
+            tileCacheService: context.read<TileCacheService>(),
+          ),
+          update: (context, conn, contacts, messages, tileCache, previous) =>
+              previous ??
+              AppProvider(
+                connectionProvider: conn,
+                contactsProvider: contacts,
+                messagesProvider: messages,
+                tileCacheService: tileCache,
+              ),
+        ),
+      ],
+      child: MaterialApp(
+        title: 'MeshCore SAR',
+        debugShowCheckedModeBanner: false,
+        theme: ThemeData(
+          useMaterial3: true,
+          colorScheme: ColorScheme.fromSeed(
+            seedColor: Colors.orange,
+            brightness: Brightness.light,
+          ),
+          appBarTheme: const AppBarTheme(
+            centerTitle: true,
+            elevation: 0,
+          ),
+          cardTheme: CardThemeData(
+            elevation: 2,
+            shape: RoundedRectangleBorder(
+              borderRadius: BorderRadius.circular(12),
+            ),
+          ),
+          inputDecorationTheme: InputDecorationTheme(
+            border: OutlineInputBorder(
+              borderRadius: BorderRadius.circular(12),
+            ),
+            filled: true,
+          ),
+        ),
+        darkTheme: ThemeData(
+          useMaterial3: true,
+          colorScheme: ColorScheme.fromSeed(
+            seedColor: Colors.orange,
+            brightness: Brightness.dark,
+          ),
+          appBarTheme: const AppBarTheme(
+            centerTitle: true,
+            elevation: 0,
+          ),
+          cardTheme: CardThemeData(
+            elevation: 2,
+            shape: RoundedRectangleBorder(
+              borderRadius: BorderRadius.circular(12),
+            ),
+          ),
+          inputDecorationTheme: InputDecorationTheme(
+            border: OutlineInputBorder(
+              borderRadius: BorderRadius.circular(12),
+            ),
+            filled: true,
+          ),
+        ),
+        themeMode: ThemeMode.system,
+        home: const HomeScreen(),
+      ),
+    );
+  }
+}

lib/models/contact.dart

@@ -0,0 +1,174 @@
+import 'dart:typed_data';
+import 'package:latlong2/latlong.dart';
+import 'contact_telemetry.dart';
+
+/// MeshCore contact types
+enum ContactType {
+  none(0),
+  chat(1),
+  repeater(2),
+  room(3);
+
+  const ContactType(this.value);
+  final int value;
+
+  static ContactType fromValue(int value) {
+    return ContactType.values.firstWhere(
+      (e) => e.value == value,
+      orElse: () => ContactType.none,
+    );
+  }
+
+  String get displayName {
+    switch (this) {
+      case ContactType.chat:
+        return 'Chat';
+      case ContactType.repeater:
+        return 'Repeater';
+      case ContactType.room:
+        return 'Room';
+      default:
+        return 'Unknown';
+    }
+  }
+}
+
+/// MeshCore contact model
+class Contact {
+  final Uint8List publicKey;
+  final ContactType type;
+  final int flags;
+  final int outPathLen;
+  final Uint8List outPath;
+  final String advName;
+  final int lastAdvert; // Unix timestamp
+  final int advLat; // Latitude as int32
+  final int advLon; // Longitude as int32
+  final int lastMod; // Unix timestamp
+
+  // Telemetry data (updated separately)
+  ContactTelemetry? telemetry;
+
+  Contact({
+    required this.publicKey,
+    required this.type,
+    required this.flags,
+    required this.outPathLen,
+    required this.outPath,
+    required this.advName,
+    required this.lastAdvert,
+    required this.advLat,
+    required this.advLon,
+    required this.lastMod,
+    this.telemetry,
+  });
+
+  /// Get public key as hex string (first 8 bytes)
+  String get publicKeyShort {
+    if (publicKey.length < 8) return '';
+    return publicKey.sublist(0, 8).map((b) => b.toRadixString(16).padLeft(2, '0')).join('');
+  }
+
+  /// Get full public key as hex string
+  String get publicKeyHex {
+    return publicKey.map((b) => b.toRadixString(16).padLeft(2, '0')).join('');
+  }
+
+  /// Convert advLat/advLon to LatLng
+  LatLng? get advertLocation {
+    if (advLat == 0 && advLon == 0) return null;
+    // Convert from int32 to double (degrees)
+    final lat = advLat / 1e7;
+    final lon = advLon / 1e7;
+    return LatLng(lat, lon);
+  }
+
+  /// Get display location (prefer telemetry over advert)
+  LatLng? get displayLocation {
+    if (telemetry?.gpsLocation != null && telemetry!.isRecent) {
+      return telemetry!.gpsLocation;
+    }
+    return advertLocation;
+  }
+
+  /// Get display battery (from telemetry or null)
+  double? get displayBattery {
+    return telemetry?.batteryPercentage;
+  }
+
+  /// Check if contact is a chat type (team member)
+  bool get isChat => type == ContactType.chat;
+
+  /// Check if contact is a repeater
+  bool get isRepeater => type == ContactType.repeater;
+
+  /// Check if contact is a room/channel
+  bool get isRoom => type == ContactType.room;
+
+  /// Get last seen time
+  DateTime get lastSeenTime {
+    return DateTime.fromMillisecondsSinceEpoch(lastAdvert * 1000);
+  }
+
+  /// Get last modified time
+  DateTime get lastModifiedTime {
+    return DateTime.fromMillisecondsSinceEpoch(lastMod * 1000);
+  }
+
+  /// Check if contact was seen recently (within last 10 minutes)
+  bool get isRecentlySeen {
+    return DateTime.now().difference(lastSeenTime).inMinutes < 10;
+  }
+
+  /// Get friendly time since last seen
+  String get timeSinceLastSeen {
+    final diff = DateTime.now().difference(lastSeenTime);
+    if (diff.inMinutes < 1) return 'Just now';
+    if (diff.inMinutes < 60) return '${diff.inMinutes}m ago';
+    if (diff.inHours < 24) return '${diff.inHours}h ago';
+    return '${diff.inDays}d ago';
+  }
+
+  Contact copyWith({
+    Uint8List? publicKey,
+    ContactType? type,
+    int? flags,
+    int? outPathLen,
+    Uint8List? outPath,
+    String? advName,
+    int? lastAdvert,
+    int? advLat,
+    int? advLon,
+    int? lastMod,
+    ContactTelemetry? telemetry,
+  }) {
+    return Contact(
+      publicKey: publicKey ?? this.publicKey,
+      type: type ?? this.type,
+      flags: flags ?? this.flags,
+      outPathLen: outPathLen ?? this.outPathLen,
+      outPath: outPath ?? this.outPath,
+      advName: advName ?? this.advName,
+      lastAdvert: lastAdvert ?? this.lastAdvert,
+      advLat: advLat ?? this.advLat,
+      advLon: advLon ?? this.advLon,
+      lastMod: lastMod ?? this.lastMod,
+      telemetry: telemetry ?? this.telemetry,
+    );
+  }
+
+  @override
+  String toString() {
+    return 'Contact(name: $advName, type: ${type.displayName}, key: $publicKeyShort)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+    return other is Contact &&
+           publicKeyHex == other.publicKeyHex;
+  }
+
+  @override
+  int get hashCode => publicKeyHex.hashCode;
+}

lib/models/contact_telemetry.dart

@@ -0,0 +1,76 @@
+import 'package:latlong2/latlong.dart';
+
+/// Contact telemetry data from MeshCore device
+class ContactTelemetry {
+  final LatLng? gpsLocation;
+  final double? batteryPercentage;
+  final double? batteryMilliVolts;
+  final double? temperature;
+  final DateTime timestamp;
+
+  // Additional sensor data
+  final double? humidity;
+  final double? pressure;
+  final Map<String, dynamic>? extraSensorData;
+
+  ContactTelemetry({
+    this.gpsLocation,
+    this.batteryPercentage,
+    this.batteryMilliVolts,
+    this.temperature,
+    required this.timestamp,
+    this.humidity,
+    this.pressure,
+    this.extraSensorData,
+  });
+
+  /// Check if telemetry data is recent (within last 5 minutes)
+  bool get isRecent {
+    return DateTime.now().difference(timestamp).inMinutes < 5;
+  }
+
+  /// Check if battery level is low (< 20%)
+  bool get isLowBattery {
+    return batteryPercentage != null && batteryPercentage! < 20.0;
+  }
+
+  /// Check if battery level is critical (< 10%)
+  bool get isCriticalBattery {
+    return batteryPercentage != null && batteryPercentage! < 10.0;
+  }
+
+  /// Get battery status color indicator
+  String get batteryStatus {
+    if (batteryPercentage == null) return 'unknown';
+    if (batteryPercentage! > 50) return 'good';
+    if (batteryPercentage! > 20) return 'medium';
+    return 'low';
+  }
+
+  ContactTelemetry copyWith({
+    LatLng? gpsLocation,
+    double? batteryPercentage,
+    double? batteryMilliVolts,
+    double? temperature,
+    DateTime? timestamp,
+    double? humidity,
+    double? pressure,
+    Map<String, dynamic>? extraSensorData,
+  }) {
+    return ContactTelemetry(
+      gpsLocation: gpsLocation ?? this.gpsLocation,
+      batteryPercentage: batteryPercentage ?? this.batteryPercentage,
+      batteryMilliVolts: batteryMilliVolts ?? this.batteryMilliVolts,
+      temperature: temperature ?? this.temperature,
+      timestamp: timestamp ?? this.timestamp,
+      humidity: humidity ?? this.humidity,
+      pressure: pressure ?? this.pressure,
+      extraSensorData: extraSensorData ?? this.extraSensorData,
+    );
+  }
+
+  @override
+  String toString() {
+    return 'ContactTelemetry(gps: $gpsLocation, battery: $batteryPercentage%, temp: $temperature°C, time: $timestamp)';
+  }
+}

lib/models/device_info.dart

@@ -0,0 +1,173 @@
+import 'dart:typed_data';
+
+/// BLE connection state
+enum ConnectionState {
+  disconnected,
+  connecting,
+  connected,
+  disconnecting,
+  error,
+}
+
+/// MeshCore device information
+class DeviceInfo {
+  final String? deviceId;
+  final String? deviceName;
+  final ConnectionState connectionState;
+  final int? batteryMilliVolts;
+  final double? batteryPercentage;
+  final int? signalRssi;
+  final double? signalSnr;
+  final DateTime? lastUpdate;
+
+  // Self info from MeshCore device
+  final int? deviceType;
+  final int? txPower;
+  final int? maxTxPower;
+  final Uint8List? publicKey;
+  final int? advLat;
+  final int? advLon;
+  final bool? manualAddContacts;
+  final int? radioFreq;
+  final int? radioBw;
+  final int? radioSf;
+  final int? radioCr;
+  final String? selfName;
+
+  // Firmware info
+  final int? firmwareVersion;
+  final String? firmwareBuildDate;
+  final String? manufacturerModel;
+
+  DeviceInfo({
+    this.deviceId,
+    this.deviceName,
+    this.connectionState = ConnectionState.disconnected,
+    this.batteryMilliVolts,
+    this.batteryPercentage,
+    this.signalRssi,
+    this.signalSnr,
+    this.lastUpdate,
+    this.deviceType,
+    this.txPower,
+    this.maxTxPower,
+    this.publicKey,
+    this.advLat,
+    this.advLon,
+    this.manualAddContacts,
+    this.radioFreq,
+    this.radioBw,
+    this.radioSf,
+    this.radioCr,
+    this.selfName,
+    this.firmwareVersion,
+    this.firmwareBuildDate,
+    this.manufacturerModel,
+  });
+
+  /// Check if device is connected
+  bool get isConnected => connectionState == ConnectionState.connected;
+
+  /// Check if device is connecting
+  bool get isConnecting => connectionState == ConnectionState.connecting;
+
+  /// Check if device has error
+  bool get hasError => connectionState == ConnectionState.error;
+
+  /// Get battery percentage (calculated or provided)
+  double? get batteryPercent {
+    if (batteryPercentage != null) return batteryPercentage!;
+    if (batteryMilliVolts == null) return null;
+
+    // Rough conversion from mV to percentage (3.0V = 0%, 4.2V = 100%)
+    final voltage = batteryMilliVolts! / 1000.0;
+    if (voltage <= 3.0) return 0.0;
+    if (voltage >= 4.2) return 100.0;
+    return ((voltage - 3.0) / 1.2) * 100.0;
+  }
+
+  /// Get battery status
+  String get batteryStatus {
+    final percent = batteryPercent;
+    if (percent == null) return 'Unknown';
+    if (percent > 80) return 'Excellent';
+    if (percent > 50) return 'Good';
+    if (percent > 20) return 'Low';
+    return 'Critical';
+  }
+
+  /// Get signal strength category
+  String get signalStrength {
+    if (signalRssi == null) return 'Unknown';
+    if (signalRssi! > -60) return 'Excellent';
+    if (signalRssi! > -70) return 'Good';
+    if (signalRssi! > -80) return 'Fair';
+    return 'Poor';
+  }
+
+  /// Get public key as hex string (short)
+  String? get publicKeyShort {
+    if (publicKey == null || publicKey!.length < 8) return null;
+    return publicKey!
+        .sublist(0, 8)
+        .map((b) => b.toRadixString(16).padLeft(2, '0'))
+        .join('');
+  }
+
+  DeviceInfo copyWith({
+    String? deviceId,
+    String? deviceName,
+    ConnectionState? connectionState,
+    int? batteryMilliVolts,
+    double? batteryPercentage,
+    int? signalRssi,
+    double? signalSnr,
+    DateTime? lastUpdate,
+    int? deviceType,
+    int? txPower,
+    int? maxTxPower,
+    Uint8List? publicKey,
+    int? advLat,
+    int? advLon,
+    bool? manualAddContacts,
+    int? radioFreq,
+    int? radioBw,
+    int? radioSf,
+    int? radioCr,
+    String? selfName,
+    int? firmwareVersion,
+    String? firmwareBuildDate,
+    String? manufacturerModel,
+  }) {
+    return DeviceInfo(
+      deviceId: deviceId ?? this.deviceId,
+      deviceName: deviceName ?? this.deviceName,
+      connectionState: connectionState ?? this.connectionState,
+      batteryMilliVolts: batteryMilliVolts ?? this.batteryMilliVolts,
+      batteryPercentage: batteryPercentage ?? this.batteryPercentage,
+      signalRssi: signalRssi ?? this.signalRssi,
+      signalSnr: signalSnr ?? this.signalSnr,
+      lastUpdate: lastUpdate ?? this.lastUpdate,
+      deviceType: deviceType ?? this.deviceType,
+      txPower: txPower ?? this.txPower,
+      maxTxPower: maxTxPower ?? this.maxTxPower,
+      publicKey: publicKey ?? this.publicKey,
+      advLat: advLat ?? this.advLat,
+      advLon: advLon ?? this.advLon,
+      manualAddContacts: manualAddContacts ?? this.manualAddContacts,
+      radioFreq: radioFreq ?? this.radioFreq,
+      radioBw: radioBw ?? this.radioBw,
+      radioSf: radioSf ?? this.radioSf,
+      radioCr: radioCr ?? this.radioCr,
+      selfName: selfName ?? this.selfName,
+      firmwareVersion: firmwareVersion ?? this.firmwareVersion,
+      firmwareBuildDate: firmwareBuildDate ?? this.firmwareBuildDate,
+      manufacturerModel: manufacturerModel ?? this.manufacturerModel,
+    );
+  }
+
+  @override
+  String toString() {
+    return 'DeviceInfo(name: $deviceName, state: $connectionState, battery: ${batteryPercent?.toStringAsFixed(0)}%, signal: $signalRssi dBm)';
+  }
+}

lib/models/map_layer.dart

@@ -0,0 +1,56 @@
+enum MapLayerType {
+  openStreetMap,
+  openTopoMap,
+  esriWorldImagery,
+}
+
+class MapLayer {
+  final MapLayerType type;
+  final String name;
+  final String urlTemplate;
+  final String attribution;
+  final int maxZoom;
+
+  const MapLayer({
+    required this.type,
+    required this.name,
+    required this.urlTemplate,
+    required this.attribution,
+    required this.maxZoom,
+  });
+
+  static const openStreetMap = MapLayer(
+    type: MapLayerType.openStreetMap,
+    name: 'OpenStreetMap',
+    urlTemplate: 'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
+    attribution: '© OpenStreetMap contributors',
+    maxZoom: 19,
+  );
+
+  static const openTopoMap = MapLayer(
+    type: MapLayerType.openTopoMap,
+    name: 'OpenTopoMap',
+    urlTemplate: 'https://a.tile.opentopomap.org/{z}/{x}/{y}.png',
+    attribution: '© OpenTopoMap (CC-BY-SA)',
+    maxZoom: 17,
+  );
+
+  static const esriWorldImagery = MapLayer(
+    type: MapLayerType.esriWorldImagery,
+    name: 'ESRI Satellite',
+    urlTemplate:
+        'https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}',
+    attribution: '© Esri',
+    maxZoom: 19,
+  );
+
+  static const List<MapLayer> allLayers = [
+    openStreetMap,
+    openTopoMap,
+    esriWorldImagery,
+  ];
+
+  static MapLayer fromType(MapLayerType type) {
+    return allLayers.firstWhere((layer) => layer.type == type);
+  }
+}

lib/models/message.dart

@@ -0,0 +1,171 @@
+import 'dart:typed_data';
+import 'package:latlong2/latlong.dart';
+import 'sar_marker.dart';
+
+/// Message text types from MeshCore protocol
+enum MessageTextType {
+  plain(0),
+  cliData(1),
+  signedPlain(2);
+
+  const MessageTextType(this.value);
+  final int value;
+
+  static MessageTextType fromValue(int value) {
+    return MessageTextType.values.firstWhere(
+      (e) => e.value == value,
+      orElse: () => MessageTextType.plain,
+    );
+  }
+}
+
+/// Message type (contact or channel)
+enum MessageType {
+  contact,
+  channel,
+}
+
+/// MeshCore message model
+class Message {
+  final String id;
+  final MessageType messageType;
+  final Uint8List? senderPublicKeyPrefix; // 6 bytes for contact messages
+  final int? channelIdx; // For channel messages
+  final int pathLen;
+  final MessageTextType textType;
+  final int senderTimestamp; // Unix timestamp
+  final String text;
+
+  // SAR marker data (if this is a SAR message)
+  final bool isSarMarker;
+  final SarMarkerType? sarMarkerType;
+  final LatLng? sarGpsCoordinates;
+
+  // Display metadata
+  final DateTime receivedAt;
+  final String? senderName;
+
+  Message({
+    required this.id,
+    required this.messageType,
+    this.senderPublicKeyPrefix,
+    this.channelIdx,
+    required this.pathLen,
+    required this.textType,
+    required this.senderTimestamp,
+    required this.text,
+    this.isSarMarker = false,
+    this.sarMarkerType,
+    this.sarGpsCoordinates,
+    required this.receivedAt,
+    this.senderName,
+  });
+
+  /// Get sender public key as hex string
+  String? get senderKeyShort {
+    if (senderPublicKeyPrefix == null) return null;
+    return senderPublicKeyPrefix!
+        .map((b) => b.toRadixString(16).padLeft(2, '0'))
+        .join('');
+  }
+
+  /// Get sender timestamp as DateTime
+  DateTime get sentAt {
+    return DateTime.fromMillisecondsSinceEpoch(senderTimestamp * 1000);
+  }
+
+  /// Check if message is from a channel
+  bool get isChannelMessage => messageType == MessageType.channel;
+
+  /// Check if message is from a contact
+  bool get isContactMessage => messageType == MessageType.contact;
+
+  /// Get friendly time since message was sent
+  String get timeAgo {
+    final diff = DateTime.now().difference(sentAt);
+    if (diff.inMinutes < 1) return 'Just now';
+    if (diff.inMinutes < 60) return '${diff.inMinutes}m ago';
+    if (diff.inHours < 24) return '${diff.inHours}h ago';
+    return '${diff.inDays}d ago';
+  }
+
+  /// Get display name for sender
+  String get displaySender {
+    if (senderName != null && senderName!.isNotEmpty) {
+      return senderName!;
+    }
+    if (senderKeyShort != null) {
+      return senderKeyShort!.substring(0, 8);
+    }
+    if (isChannelMessage && channelIdx != null) {
+      return 'Channel $channelIdx';
+    }
+    return 'Unknown';
+  }
+
+  /// Convert to SAR marker if applicable
+  SarMarker? toSarMarker() {
+    if (!isSarMarker || sarMarkerType == null || sarGpsCoordinates == null) {
+      return null;
+    }
+
+    return SarMarker(
+      id: id,
+      type: sarMarkerType!,
+      location: sarGpsCoordinates!,
+      timestamp: sentAt,
+      senderPublicKey: senderPublicKeyPrefix,
+      senderName: senderName,
+      notes: text,
+    );
+  }
+
+  Message copyWith({
+    String? id,
+    MessageType? messageType,
+    Uint8List? senderPublicKeyPrefix,
+    int? channelIdx,
+    int? pathLen,
+    MessageTextType? textType,
+    int? senderTimestamp,
+    String? text,
+    bool? isSarMarker,
+    SarMarkerType? sarMarkerType,
+    LatLng? sarGpsCoordinates,
+    DateTime? receivedAt,
+    String? senderName,
+  }) {
+    return Message(
+      id: id ?? this.id,
+      messageType: messageType ?? this.messageType,
+      senderPublicKeyPrefix: senderPublicKeyPrefix ?? this.senderPublicKeyPrefix,
+      channelIdx: channelIdx ?? this.channelIdx,
+      pathLen: pathLen ?? this.pathLen,
+      textType: textType ?? this.textType,
+      senderTimestamp: senderTimestamp ?? this.senderTimestamp,
+      text: text ?? this.text,
+      isSarMarker: isSarMarker ?? this.isSarMarker,
+      sarMarkerType: sarMarkerType ?? this.sarMarkerType,
+      sarGpsCoordinates: sarGpsCoordinates ?? this.sarGpsCoordinates,
+      receivedAt: receivedAt ?? this.receivedAt,
+      senderName: senderName ?? this.senderName,
+    );
+  }
+
+  @override
+  String toString() {
+    if (isSarMarker) {
+      return 'Message(SAR: ${sarMarkerType?.displayName}, from: $displaySender)';
+    }
+    return 'Message(from: $displaySender, text: ${text.length > 30 ? '${text.substring(0, 30)}...' : text})';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+    return other is Message && id == other.id;
+  }
+
+  @override
+  int get hashCode => id.hashCode;
+}

lib/models/sar_marker.dart

@@ -0,0 +1,126 @@
+import 'dart:typed_data';
+import 'package:latlong2/latlong.dart';
+
+/// SAR (Search & Rescue) marker types
+enum SarMarkerType {
+  foundPerson('🧑', 'Found Person'),
+  fire('🔥', 'Fire'),
+  stagingArea('🏕️', 'Staging Area'),
+  unknown('❓', 'Unknown');
+
+  const SarMarkerType(this.emoji, this.displayName);
+  final String emoji;
+  final String displayName;
+
+  static SarMarkerType fromEmoji(String emoji) {
+    switch (emoji) {
+      case '🧑':
+      case '👤':
+        return SarMarkerType.foundPerson;
+      case '🔥':
+        return SarMarkerType.fire;
+      case '🏕️':
+      case '⛺':
+        return SarMarkerType.stagingArea;
+      default:
+        return SarMarkerType.unknown;
+    }
+  }
+
+  /// Get map marker color
+  String get markerColor {
+    switch (this) {
+      case SarMarkerType.foundPerson:
+        return '#4CAF50'; // Green
+      case SarMarkerType.fire:
+        return '#F44336'; // Red
+      case SarMarkerType.stagingArea:
+        return '#2196F3'; // Blue
+      default:
+        return '#9E9E9E'; // Gray
+    }
+  }
+}
+
+/// SAR marker from special messages
+class SarMarker {
+  final String id;
+  final SarMarkerType type;
+  final LatLng location;
+  final DateTime timestamp;
+  final Uint8List? senderPublicKey;
+  final String? senderName;
+  final String? notes;
+
+  SarMarker({
+    required this.id,
+    required this.type,
+    required this.location,
+    required this.timestamp,
+    this.senderPublicKey,
+    this.senderName,
+    this.notes,
+  });
+
+  /// Get sender public key as hex string (short)
+  String? get senderKeyShort {
+    if (senderPublicKey == null || senderPublicKey!.length < 8) return null;
+    return senderPublicKey!
+        .sublist(0, 8)
+        .map((b) => b.toRadixString(16).padLeft(2, '0'))
+        .join('');
+  }
+
+  /// Get friendly time since marker was created
+  String get timeAgo {
+    final diff = DateTime.now().difference(timestamp);
+    if (diff.inMinutes < 1) return 'Just now';
+    if (diff.inMinutes < 60) return '${diff.inMinutes}m ago';
+    if (diff.inHours < 24) return '${diff.inHours}h ago';
+    return '${diff.inDays}d ago';
+  }
+
+  /// Check if marker is recent (within last hour)
+  bool get isRecent {
+    return DateTime.now().difference(timestamp).inHours < 1;
+  }
+
+  /// Get display name
+  String get displayName {
+    return '${type.emoji} ${type.displayName}';
+  }
+
+  SarMarker copyWith({
+    String? id,
+    SarMarkerType? type,
+    LatLng? location,
+    DateTime? timestamp,
+    Uint8List? senderPublicKey,
+    String? senderName,
+    String? notes,
+  }) {
+    return SarMarker(
+      id: id ?? this.id,
+      type: type ?? this.type,
+      location: location ?? this.location,
+      timestamp: timestamp ?? this.timestamp,
+      senderPublicKey: senderPublicKey ?? this.senderPublicKey,
+      senderName: senderName ?? this.senderName,
+      notes: notes ?? this.notes,
+    );
+  }
+
+  @override
+  String toString() {
+    return 'SarMarker(type: ${type.displayName}, location: $location, sender: $senderName, time: $timeAgo)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+    return other is SarMarker && id == other.id;
+  }
+
+  @override
+  int get hashCode => id.hashCode;
+}

lib/providers/app_provider.dart

@@ -0,0 +1,121 @@
+import 'package:flutter/foundation.dart';
+import 'connection_provider.dart';
+import 'contacts_provider.dart';
+import 'messages_provider.dart';
+import '../services/tile_cache_service.dart';
+
+/// Main App Provider - coordinates all other providers
+class AppProvider with ChangeNotifier {
+  final ConnectionProvider connectionProvider;
+  final ContactsProvider contactsProvider;
+  final MessagesProvider messagesProvider;
+  final TileCacheService tileCacheService;
+
+  bool _isInitialized = false;
+  bool get isInitialized => _isInitialized;
+
+  AppProvider({
+    required this.connectionProvider,
+    required this.contactsProvider,
+    required this.messagesProvider,
+    required this.tileCacheService,
+  }) {
+    _setupCallbacks();
+    _initializeTileCache();
+    _isInitialized = true;
+  }
+
+  /// Initialize tile cache service
+  Future<void> _initializeTileCache() async {
+    try {
+      await tileCacheService.initialize();
+      debugPrint('Tile cache initialized');
+    } catch (e) {
+      debugPrint('Error initializing tile cache: $e');
+    }
+  }
+
+  /// Setup callbacks between providers
+  void _setupCallbacks() {
+    // When a contact is received from BLE
+    connectionProvider.onContactReceived = (contact) {
+      contactsProvider.addOrUpdateContact(contact);
+    };
+
+    // When all contacts are received
+    connectionProvider.onContactsComplete = (contacts) {
+      contactsProvider.addContacts(contacts);
+      debugPrint('Received ${contacts.length} contacts');
+    };
+
+    // When a message is received
+    connectionProvider.onMessageReceived = (message) {
+      messagesProvider.addMessage(message);
+
+      // Optionally update sender name from contacts
+      if (message.senderPublicKeyPrefix != null) {
+        final contact = contactsProvider
+            .findContactByKey(message.senderPublicKeyPrefix!);
+        if (contact != null) {
+          final updatedMessage = message.copyWith(senderName: contact.advName);
+          // Note: You might want to update the message in the list
+        }
+      }
+    };
+
+    // When telemetry is received
+    connectionProvider.onTelemetryReceived = (publicKey, lppData) {
+      contactsProvider.updateTelemetry(publicKey, lppData);
+    };
+  }
+
+  /// Initialize the app (load contacts, sync time, etc.)
+  Future<void> initialize() async {
+    if (!connectionProvider.deviceInfo.isConnected) return;
+
+    try {
+      // Sync device time
+      await connectionProvider.syncDeviceTime();
+
+      // Load contacts
+      await connectionProvider.getContacts();
+
+      notifyListeners();
+    } catch (e) {
+      debugPrint('Initialization error: $e');
+    }
+  }
+
+  /// Refresh data (contacts, messages)
+  Future<void> refresh() async {
+    if (!connectionProvider.deviceInfo.isConnected) return;
+
+    try {
+      await connectionProvider.getContacts();
+      notifyListeners();
+    } catch (e) {
+      debugPrint('Refresh error: $e');
+    }
+  }
+
+  /// Clear all data
+  void clearAllData() {
+    contactsProvider.clearContacts();
+    messagesProvider.clearAll();
+    notifyListeners();
+  }
+
+  /// Get app statistics
+  Map<String, dynamic> get statistics {
+    return {
+      'connection': {
+        'isConnected': connectionProvider.deviceInfo.isConnected,
+        'deviceName': connectionProvider.deviceInfo.deviceName,
+        'battery': connectionProvider.deviceInfo.batteryPercent,
+      },
+      'contacts': contactsProvider.contactCounts,
+      'messages': messagesProvider.messageStats,
+      'sarMarkers': messagesProvider.sarMarkerStats,
+    };
+  }
+}

lib/providers/connection_provider.dart

@@ -0,0 +1,240 @@
+import 'dart:async';
+import 'dart:typed_data';
+import 'package:flutter/foundation.dart';
+import 'package:flutter_blue_plus/flutter_blue_plus.dart';
+import '../models/device_info.dart';
+import '../models/contact.dart';
+import '../models/message.dart';
+import '../services/meshcore_ble_service.dart';
+import '../services/cayenne_lpp_parser.dart';
+import '../utils/sar_message_parser.dart';
+
+/// Connection Provider - manages MeshCore BLE connection
+class ConnectionProvider with ChangeNotifier {
+  final MeshCoreBleService _bleService = MeshCoreBleService();
+
+  DeviceInfo _deviceInfo = DeviceInfo();
+  DeviceInfo get deviceInfo => _deviceInfo;
+
+  List<BluetoothDevice> _scannedDevices = [];
+  List<BluetoothDevice> get scannedDevices => _scannedDevices;
+
+  bool _isScanning = false;
+  bool get isScanning => _isScanning;
+
+  String? _error;
+  String? get error => _error;
+
+  // Callbacks for other providers
+  Function(Contact)? onContactReceived;
+  Function(List<Contact>)? onContactsComplete;
+  Function(Message)? onMessageReceived;
+  Function(Uint8List publicKey, Uint8List lppData)? onTelemetryReceived;
+
+  ConnectionProvider() {
+    _initializeBleService();
+  }
+
+  void _initializeBleService() {
+    _bleService.onConnectionStateChanged = (isConnected) {
+      _deviceInfo = _deviceInfo.copyWith(
+        connectionState: isConnected
+            ? ConnectionState.connected
+            : ConnectionState.disconnected,
+        lastUpdate: DateTime.now(),
+      );
+      notifyListeners();
+    };
+
+    _bleService.onError = (error) {
+      _error = error;
+      _deviceInfo = _deviceInfo.copyWith(
+        connectionState: ConnectionState.error,
+      );
+      notifyListeners();
+    };
+
+    _bleService.onContactReceived = (contact) {
+      onContactReceived?.call(contact);
+    };
+
+    _bleService.onContactsComplete = (contacts) {
+      onContactsComplete?.call(contacts);
+    };
+
+    _bleService.onMessageReceived = (message) {
+      // Parse SAR markers
+      final enhancedMessage = SarMessageParser.enhanceMessage(message);
+      onMessageReceived?.call(enhancedMessage);
+    };
+
+    _bleService.onTelemetryReceived = (publicKey, lppData) {
+      onTelemetryReceived?.call(publicKey, lppData);
+    };
+  }
+
+  /// Start scanning for MeshCore devices
+  Future<void> startScan() async {
+    _isScanning = true;
+    _scannedDevices.clear();
+    _error = null;
+    notifyListeners();
+
+    try {
+      await for (final device
+          in _bleService.scanForDevices(timeout: const Duration(seconds: 10))) {
+        if (!_scannedDevices.any((d) => d.remoteId == device.remoteId)) {
+          _scannedDevices.add(device);
+          notifyListeners();
+        }
+      }
+    } catch (e) {
+      _error = 'Scan error: $e';
+    } finally {
+      _isScanning = false;
+      notifyListeners();
+    }
+  }
+
+  /// Stop scanning
+  Future<void> stopScan() async {
+    await FlutterBluePlus.stopScan();
+    _isScanning = false;
+    notifyListeners();
+  }
+
+  /// Connect to a device
+  Future<bool> connect(BluetoothDevice device) async {
+    _deviceInfo = _deviceInfo.copyWith(
+      deviceId: device.remoteId.toString(),
+      deviceName: device.platformName.isNotEmpty ? device.platformName : 'Unknown',
+      connectionState: ConnectionState.connecting,
+    );
+    _error = null;
+    notifyListeners();
+
+    final success = await _bleService.connect(device);
+    if (!success) {
+      _deviceInfo = _deviceInfo.copyWith(
+        connectionState: ConnectionState.error,
+      );
+      notifyListeners();
+    }
+    return success;
+  }
+
+  /// Disconnect from device
+  Future<void> disconnect() async {
+    _deviceInfo = _deviceInfo.copyWith(
+      connectionState: ConnectionState.disconnecting,
+    );
+    notifyListeners();
+
+    await _bleService.disconnect();
+
+    _deviceInfo = DeviceInfo(
+      connectionState: ConnectionState.disconnected,
+    );
+    notifyListeners();
+  }
+
+  /// Get contacts from device
+  Future<void> getContacts() async {
+    if (!_bleService.isConnected) {
+      _error = 'Not connected to device';
+      notifyListeners();
+      return;
+    }
+
+    try {
+      await _bleService.getContacts();
+    } catch (e) {
+      _error = 'Failed to get contacts: $e';
+      notifyListeners();
+    }
+  }
+
+  /// Send text message to contact
+  Future<void> sendTextMessage({
+    required Uint8List contactPublicKey,
+    required String text,
+  }) async {
+    if (!_bleService.isConnected) {
+      _error = 'Not connected to device';
+      notifyListeners();
+      return;
+    }
+
+    try {
+      await _bleService.sendTextMessage(
+        contactPublicKey: contactPublicKey,
+        text: text,
+      );
+    } catch (e) {
+      _error = 'Failed to send message: $e';
+      notifyListeners();
+    }
+  }
+
+  /// Send channel message
+  Future<void> sendChannelMessage({
+    required int channelIdx,
+    required String text,
+  }) async {
+    if (!_bleService.isConnected) {
+      _error = 'Not connected to device';
+      notifyListeners();
+      return;
+    }
+
+    try {
+      await _bleService.sendChannelMessage(
+        channelIdx: channelIdx,
+        text: text,
+      );
+    } catch (e) {
+      _error = 'Failed to send channel message: $e';
+      notifyListeners();
+    }
+  }
+
+  /// Request telemetry from contact
+  Future<void> requestTelemetry(Uint8List contactPublicKey) async {
+    if (!_bleService.isConnected) {
+      _error = 'Not connected to device';
+      notifyListeners();
+      return;
+    }
+
+    try {
+      await _bleService.requestTelemetry(contactPublicKey);
+    } catch (e) {
+      _error = 'Failed to request telemetry: $e';
+      notifyListeners();
+    }
+  }
+
+  /// Set device time to current time
+  Future<void> syncDeviceTime() async {
+    if (!_bleService.isConnected) return;
+
+    try {
+      await _bleService.setDeviceTime();
+    } catch (e) {
+      _error = 'Failed to sync time: $e';
+      notifyListeners();
+    }
+  }
+
+  /// Clear error message
+  void clearError() {
+    _error = null;
+    notifyListeners();
+  }
+
+  @override
+  void dispose() {
+    _bleService.dispose();
+    super.dispose();
+  }
+}

lib/providers/contacts_provider.dart

@@ -0,0 +1,135 @@
+import 'dart:async';
+import 'dart:typed_data';
+import 'package:flutter/foundation.dart';
+import '../models/contact.dart';
+import '../models/contact_telemetry.dart';
+import '../services/cayenne_lpp_parser.dart';
+
+/// Contacts Provider - manages contact list and telemetry
+class ContactsProvider with ChangeNotifier {
+  final Map<String, Contact> _contacts = {};
+
+  List<Contact> get contacts => _contacts.values.toList();
+
+  List<Contact> get chatContacts =>
+      contacts.where((c) => c.isChat).toList()..sort(_sortByLastSeen);
+
+  List<Contact> get repeaters =>
+      contacts.where((c) => c.isRepeater).toList()..sort(_sortByLastSeen);
+
+  List<Contact> get rooms =>
+      contacts.where((c) => c.isRoom).toList()..sort(_sortByLastSeen);
+
+  /// Get contacts with location (for map display)
+  List<Contact> get contactsWithLocation =>
+      contacts.where((c) => c.displayLocation != null).toList();
+
+  /// Get chat contacts with location (team members on map)
+  List<Contact> get chatContactsWithLocation =>
+      chatContacts.where((c) => c.displayLocation != null).toList();
+
+  /// Sort contacts by last seen (most recent first)
+  int _sortByLastSeen(Contact a, Contact b) {
+    return b.lastSeenTime.compareTo(a.lastSeenTime);
+  }
+
+  /// Add or update a contact
+  void addOrUpdateContact(Contact contact) {
+    _contacts[contact.publicKeyHex] = contact;
+    notifyListeners();
+  }
+
+  /// Add multiple contacts
+  void addContacts(List<Contact> contacts) {
+    for (final contact in contacts) {
+      _contacts[contact.publicKeyHex] = contact;
+    }
+    notifyListeners();
+  }
+
+  /// Update contact telemetry
+  void updateTelemetry(Uint8List publicKeyPrefix, Uint8List lppData) {
+    // Find contact by public key prefix
+    final contact = _findContactByPrefix(publicKeyPrefix);
+    if (contact == null) return;
+
+    try {
+      // Parse Cayenne LPP data
+      final telemetry = CayenneLppParser.parse(lppData);
+
+      // Update contact with new telemetry
+      final updatedContact = contact.copyWith(telemetry: telemetry);
+      _contacts[contact.publicKeyHex] = updatedContact;
+      notifyListeners();
+    } catch (e) {
+      debugPrint('Failed to parse telemetry: $e');
+    }
+  }
+
+  /// Find contact by public key prefix (6 bytes)
+  Contact? _findContactByPrefix(Uint8List prefix) {
+    if (prefix.length < 6) return null;
+
+    final prefixHex = prefix
+        .sublist(0, 6)
+        .map((b) => b.toRadixString(16).padLeft(2, '0'))
+        .join('');
+
+    for (final contact in contacts) {
+      if (contact.publicKeyHex.startsWith(prefixHex)) {
+        return contact;
+      }
+    }
+    return null;
+  }
+
+  /// Find contact by public key
+  Contact? findContactByKey(Uint8List publicKey) {
+    final keyHex =
+        publicKey.map((b) => b.toRadixString(16).padLeft(2, '0')).join('');
+    return _contacts[keyHex];
+  }
+
+  /// Find contact by name
+  Contact? findContactByName(String name) {
+    return contacts.firstWhere(
+      (c) => c.advName == name,
+      orElse: () => contacts.first,
+    );
+  }
+
+  /// Get contacts with low battery
+  List<Contact> get lowBatteryContacts {
+    return contacts.where((c) {
+      final battery = c.displayBattery;
+      return battery != null && battery < 20.0;
+    }).toList();
+  }
+
+  /// Get recently seen contacts (within last 10 minutes)
+  List<Contact> get recentlySeenContacts {
+    return contacts.where((c) => c.isRecentlySeen).toList();
+  }
+
+  /// Clear all contacts
+  void clearContacts() {
+    _contacts.clear();
+    notifyListeners();
+  }
+
+  /// Remove a contact
+  void removeContact(String publicKeyHex) {
+    _contacts.remove(publicKeyHex);
+    notifyListeners();
+  }
+
+  /// Get contact count by type
+  Map<String, int> get contactCounts {
+    return {
+      'chat': chatContacts.length,
+      'repeater': repeaters.length,
+      'room': rooms.length,
+      'total': contacts.length,
+    };
+  }
+}

lib/providers/map_provider.dart

@@ -0,0 +1,35 @@
+import 'package:flutter/foundation.dart';
+import 'package:latlong2/latlong.dart';
+
+class MapProvider with ChangeNotifier {
+  LatLng? _targetLocation;
+  double? _targetZoom;
+  bool _shouldAnimate = false;
+
+  LatLng? get targetLocation => _targetLocation;
+  double? get targetZoom => _targetZoom;
+  bool get shouldAnimate => _shouldAnimate;
+
+  void navigateToLocation({
+    required LatLng location,
+    double zoom = 15.0,
+    bool animate = true,
+  }) {
+    _targetLocation = location;
+    _targetZoom = zoom;
+    _shouldAnimate = animate;
+    notifyListeners();
+  }
+
+  void clearNavigation() {
+    _targetLocation = null;
+    _targetZoom = null;
+    _shouldAnimate = false;
+    // Don't notify listeners to avoid rebuilds
+  }
+
+  void updateZoom(double zoom) {
+    _targetZoom = zoom;
+    notifyListeners();
+  }
+}

lib/providers/messages_provider.dart

@@ -0,0 +1,156 @@
+import 'package:flutter/foundation.dart';
+import '../models/message.dart';
+import '../models/sar_marker.dart';
+
+/// Messages Provider - manages message history and SAR markers
+class MessagesProvider with ChangeNotifier {
+  final List<Message> _messages = [];
+  final Map<String, SarMarker> _sarMarkers = {};
+
+  List<Message> get messages => List.unmodifiable(_messages);
+
+  List<Message> get contactMessages =>
+      _messages.where((m) => m.isContactMessage).toList();
+
+  List<Message> get channelMessages =>
+      _messages.where((m) => m.isChannelMessage).toList();
+
+  List<Message> get sarMarkerMessages =>
+      _messages.where((m) => m.isSarMarker).toList();
+
+  List<SarMarker> get sarMarkers => _sarMarkers.values.toList();
+
+  List<SarMarker> get foundPersonMarkers =>
+      sarMarkers.where((m) => m.type == SarMarkerType.foundPerson).toList();
+
+  List<SarMarker> get fireMarkers =>
+      sarMarkers.where((m) => m.type == SarMarkerType.fire).toList();
+
+  List<SarMarker> get stagingAreaMarkers =>
+      sarMarkers.where((m) => m.type == SarMarkerType.stagingArea).toList();
+
+  /// Add a message
+  void addMessage(Message message) {
+    _messages.add(message);
+
+    // If it's a SAR marker message, extract and store the marker
+    if (message.isSarMarker) {
+      final marker = message.toSarMarker();
+      if (marker != null) {
+        _sarMarkers[marker.id] = marker;
+      }
+    }
+
+    notifyListeners();
+  }
+
+  /// Add multiple messages
+  void addMessages(List<Message> messages) {
+    for (final message in messages) {
+      _messages.add(message);
+
+      if (message.isSarMarker) {
+        final marker = message.toSarMarker();
+        if (marker != null) {
+          _sarMarkers[marker.id] = marker;
+        }
+      }
+    }
+    notifyListeners();
+  }
+
+  /// Get messages for a specific contact
+  List<Message> getMessagesForContact(String senderKeyShort) {
+    return _messages
+        .where((m) =>
+            m.isContactMessage &&
+            m.senderKeyShort != null &&
+            m.senderKeyShort!.startsWith(senderKeyShort))
+        .toList();
+  }
+
+  /// Get messages for a specific channel
+  List<Message> getMessagesForChannel(int channelIdx) {
+    return _messages
+        .where((m) => m.isChannelMessage && m.channelIdx == channelIdx)
+        .toList();
+  }
+
+  /// Get recent messages (last N messages)
+  List<Message> getRecentMessages({int count = 50}) {
+    final sorted = List<Message>.from(_messages)
+      ..sort((a, b) => b.sentAt.compareTo(a.sentAt));
+    return sorted.take(count).toList();
+  }
+
+  /// Get messages from last N hours
+  List<Message> getMessagesSince(Duration duration) {
+    final cutoff = DateTime.now().subtract(duration);
+    return _messages.where((m) => m.sentAt.isAfter(cutoff)).toList();
+  }
+
+  /// Search messages by text
+  List<Message> searchMessages(String query) {
+    if (query.isEmpty) return [];
+    final lowerQuery = query.toLowerCase();
+    return _messages
+        .where((m) => m.text.toLowerCase().contains(lowerQuery))
+        .toList();
+  }
+
+  /// Get SAR marker by ID
+  SarMarker? getSarMarker(String id) {
+    return _sarMarkers[id];
+  }
+
+  /// Get recent SAR markers (within last hour)
+  List<SarMarker> getRecentSarMarkers() {
+    return sarMarkers.where((m) => m.isRecent).toList();
+  }
+
+  /// Remove a SAR marker
+  void removeSarMarker(String id) {
+    _sarMarkers.remove(id);
+    notifyListeners();
+  }
+
+  /// Clear all messages
+  void clearMessages() {
+    _messages.clear();
+    notifyListeners();
+  }
+
+  /// Clear all SAR markers
+  void clearSarMarkers() {
+    _sarMarkers.clear();
+    notifyListeners();
+  }
+
+  /// Clear all data
+  void clearAll() {
+    _messages.clear();
+    _sarMarkers.clear();
+    notifyListeners();
+  }
+
+  /// Get message statistics
+  Map<String, int> get messageStats {
+    return {
+      'total': _messages.length,
+      'contact': contactMessages.length,
+      'channel': channelMessages.length,
+      'sar': sarMarkerMessages.length,
+      'sarMarkers': sarMarkers.length,
+    };
+  }
+
+  /// Get SAR marker statistics
+  Map<String, int> get sarMarkerStats {
+    return {
+      'total': sarMarkers.length,
+      'foundPerson': foundPersonMarkers.length,
+      'fire': fireMarkers.length,
+      'stagingArea': stagingAreaMarkers.length,
+    };
+  }
+}

lib/screens/contacts_tab.dart

@@ -0,0 +1,351 @@
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import '../providers/contacts_provider.dart';
+import '../providers/connection_provider.dart';
+import '../models/contact.dart';
+
+class ContactsTab extends StatelessWidget {
+  const ContactsTab({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Consumer<ContactsProvider>(
+      builder: (context, contactsProvider, child) {
+        final chatContacts = contactsProvider.chatContacts;
+        final repeaters = contactsProvider.repeaters;
+        final rooms = contactsProvider.rooms;
+
+        if (contactsProvider.contacts.isEmpty) {
+          return Center(
+            child: Column(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [
+                Icon(
+                  Icons.contacts_outlined,
+                  size: 64,
+                  color: Theme.of(context).disabledColor,
+                ),
+                const SizedBox(height: 16),
+                Text(
+                  'No contacts yet',
+                  style: Theme.of(context).textTheme.titleLarge,
+                ),
+                const SizedBox(height: 8),
+                Text(
+                  'Connect to a device and refresh to load contacts',
+                  style: Theme.of(context).textTheme.bodyMedium,
+                  textAlign: TextAlign.center,
+                ),
+              ],
+            ),
+          );
+        }
+
+        return ListView(
+          padding: const EdgeInsets.all(8),
+          children: [
+            // Team Members (Chat contacts)
+            if (chatContacts.isNotEmpty) ...[
+              _SectionHeader(
+                title: 'Team Members',
+                count: chatContacts.length,
+                icon: Icons.people,
+              ),
+              ...chatContacts.map((contact) => _ContactTile(contact: contact)),
+              const Divider(height: 32),
+            ],
+
+            // Repeaters
+            if (repeaters.isNotEmpty) ...[
+              _SectionHeader(
+                title: 'Repeaters',
+                count: repeaters.length,
+                icon: Icons.router,
+              ),
+              ...repeaters.map((contact) => _ContactTile(contact: contact)),
+              const Divider(height: 32),
+            ],
+
+            // Rooms/Channels
+            if (rooms.isNotEmpty) ...[
+              _SectionHeader(
+                title: 'Rooms/Channels',
+                count: rooms.length,
+                icon: Icons.tag,
+              ),
+              ...rooms.map((contact) => _ContactTile(contact: contact)),
+            ],
+          ],
+        );
+      },
+    );
+  }
+}
+
+class _SectionHeader extends StatelessWidget {
+  final String title;
+  final int count;
+  final IconData icon;
+
+  const _SectionHeader({
+    required this.title,
+    required this.count,
+    required this.icon,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.symmetric(vertical: 8),
+      child: Row(
+        children: [
+          Icon(icon, size: 20),
+          const SizedBox(width: 8),
+          Text(
+            title,
+            style: Theme.of(context).textTheme.titleMedium?.copyWith(
+                  fontWeight: FontWeight.bold,
+                ),
+          ),
+          const SizedBox(width: 8),
+          Container(
+            padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 2),
+            decoration: BoxDecoration(
+              color: Theme.of(context).colorScheme.primaryContainer,
+              borderRadius: BorderRadius.circular(12),
+            ),
+            child: Text(
+              count.toString(),
+              style: Theme.of(context).textTheme.labelSmall,
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+class _ContactTile extends StatelessWidget {
+  final Contact contact;
+
+  const _ContactTile({required this.contact});
+
+  @override
+  Widget build(BuildContext context) {
+    final hasTelemetry = contact.telemetry != null && contact.telemetry!.isRecent;
+    final battery = contact.displayBattery;
+    final location = contact.displayLocation;
+
+    return Card(
+      margin: const EdgeInsets.only(bottom: 8),
+      child: ListTile(
+        leading: CircleAvatar(
+          backgroundColor: _getTypeColor(contact.type),
+          child: Icon(
+            _getTypeIcon(contact.type),
+            color: Colors.white,
+          ),
+        ),
+        title: Row(
+          children: [
+            Expanded(
+              child: Text(
+                contact.advName,
+                style: const TextStyle(fontWeight: FontWeight.bold),
+              ),
+            ),
+            // Battery indicator
+            if (battery != null) ...[
+              Icon(
+                _getBatteryIcon(battery),
+                size: 16,
+                color: _getBatteryColor(battery),
+              ),
+              const SizedBox(width: 4),
+              Text(
+                '${battery.round()}%',
+                style: Theme.of(context).textTheme.labelSmall,
+              ),
+            ],
+          ],
+        ),
+        subtitle: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            const SizedBox(height: 4),
+            // Type and last seen
+            Row(
+              children: [
+                Container(
+                  padding: const EdgeInsets.symmetric(
+                    horizontal: 6,
+                    vertical: 2,
+                  ),
+                  decoration: BoxDecoration(
+                    color: _getTypeColor(contact.type).withOpacity(0.2),
+                    borderRadius: BorderRadius.circular(4),
+                  ),
+                  child: Text(
+                    contact.type.displayName,
+                    style: Theme.of(context).textTheme.labelSmall,
+                  ),
+                ),
+                const SizedBox(width: 8),
+                Icon(
+                  Icons.access_time,
+                  size: 12,
+                  color: contact.isRecentlySeen ? Colors.green : Colors.grey,
+                ),
+                const SizedBox(width: 4),
+                Text(
+                  contact.timeSinceLastSeen,
+                  style: Theme.of(context).textTheme.labelSmall,
+                ),
+              ],
+            ),
+            const SizedBox(height: 4),
+            // Telemetry info
+            Row(
+              children: [
+                if (hasTelemetry)
+                  const Icon(Icons.sensors, size: 12, color: Colors.green)
+                else
+                  const Icon(Icons.sensors_off, size: 12, color: Colors.grey),
+                const SizedBox(width: 4),
+                if (location != null)
+                  Expanded(
+                    child: Text(
+                      'GPS: ${location.latitude.toStringAsFixed(4)}, ${location.longitude.toStringAsFixed(4)}',
+                      style: Theme.of(context).textTheme.labelSmall,
+                      overflow: TextOverflow.ellipsis,
+                    ),
+                  )
+                else
+                  Text(
+                    'No GPS data',
+                    style: Theme.of(context).textTheme.labelSmall,
+                  ),
+              ],
+            ),
+          ],
+        ),
+        trailing: IconButton(
+          icon: const Icon(Icons.refresh, size: 20),
+          onPressed: () {
+            final connectionProvider = context.read<ConnectionProvider>();
+            connectionProvider.requestTelemetry(contact.publicKey);
+            ScaffoldMessenger.of(context).showSnackBar(
+              SnackBar(
+                content: Text('Requesting telemetry from ${contact.advName}'),
+                duration: const Duration(seconds: 2),
+              ),
+            );
+          },
+          tooltip: 'Request telemetry',
+        ),
+        onTap: () => _showContactDetails(context, contact),
+      ),
+    );
+  }
+
+  void _showContactDetails(BuildContext context, Contact contact) {
+    showDialog(
+      context: context,
+      builder: (context) => AlertDialog(
+        title: Text(contact.advName),
+        content: SingleChildScrollView(
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              _DetailRow('Type', contact.type.displayName),
+              _DetailRow('Public Key', contact.publicKeyShort),
+              _DetailRow('Last Seen', contact.timeSinceLastSeen),
+              const Divider(),
+              if (contact.displayLocation != null) ...[
+                const Text('Location:', style: TextStyle(fontWeight: FontWeight.bold)),
+                _DetailRow('Latitude', contact.displayLocation!.latitude.toStringAsFixed(6)),
+                _DetailRow('Longitude', contact.displayLocation!.longitude.toStringAsFixed(6)),
+                const Divider(),
+              ],
+              if (contact.telemetry != null) ...[
+                const Text('Telemetry:', style: TextStyle(fontWeight: FontWeight.bold)),
+                if (contact.telemetry!.batteryPercentage != null)
+                  _DetailRow('Battery', '${contact.telemetry!.batteryPercentage!.toStringAsFixed(1)}%'),
+                if (contact.telemetry!.temperature != null)
+                  _DetailRow('Temperature', '${contact.telemetry!.temperature!.toStringAsFixed(1)}°C'),
+                _DetailRow('Updated', contact.telemetry!.isRecent ? 'Recently' : 'Stale'),
+              ],
+            ],
+          ),
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(context),
+            child: const Text('Close'),
+          ),
+        ],
+      ),
+    );
+  }
+
+  Widget _DetailRow(String label, String value) {
+    return Padding(
+      padding: const EdgeInsets.symmetric(vertical: 4),
+      child: Row(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          SizedBox(
+            width: 100,
+            child: Text(
+              '$label:',
+              style: const TextStyle(fontWeight: FontWeight.w500),
+            ),
+          ),
+          Expanded(
+            child: Text(value),
+          ),
+        ],
+      ),
+    );
+  }
+
+  IconData _getTypeIcon(ContactType type) {
+    switch (type) {
+      case ContactType.chat:
+        return Icons.person;
+      case ContactType.repeater:
+        return Icons.router;
+      case ContactType.room:
+        return Icons.tag;
+      default:
+        return Icons.help;
+    }
+  }
+
+  Color _getTypeColor(ContactType type) {
+    switch (type) {
+      case ContactType.chat:
+        return Colors.blue;
+      case ContactType.repeater:
+        return Colors.green;
+      case ContactType.room:
+        return Colors.orange;
+      default:
+        return Colors.grey;
+    }
+  }
+
+  IconData _getBatteryIcon(double percentage) {
+    if (percentage > 80) return Icons.battery_full;
+    if (percentage > 50) return Icons.battery_5_bar;
+    if (percentage > 20) return Icons.battery_3_bar;
+    return Icons.battery_1_bar;
+  }
+
+  Color _getBatteryColor(double percentage) {
+    if (percentage > 50) return Colors.green;
+    if (percentage > 20) return Colors.orange;
+    return Colors.red;
+  }
+}

lib/screens/home_screen.dart

@@ -0,0 +1,514 @@
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import '../providers/connection_provider.dart';
+import '../providers/app_provider.dart';
+import '../models/device_info.dart' as models;
+import '../services/tile_cache_service.dart';
+import 'messages_tab.dart';
+import 'contacts_tab.dart';
+import 'map_tab.dart';
+import 'map_management_screen.dart';
+
+class HomeScreen extends StatefulWidget {
+  const HomeScreen({super.key});
+
+  @override
+  State<HomeScreen> createState() => _HomeScreenState();
+}
+
+class _HomeScreenState extends State<HomeScreen> with SingleTickerProviderStateMixin {
+  late TabController _tabController;
+  int _currentIndex = 0;
+
+  @override
+  void initState() {
+    super.initState();
+    _tabController = TabController(length: 3, vsync: this);
+    _tabController.addListener(() {
+      setState(() {
+        _currentIndex = _tabController.index;
+      });
+    });
+  }
+
+  @override
+  void dispose() {
+    _tabController.dispose();
+    super.dispose();
+  }
+
+  void _showConnectionDialog(BuildContext context) {
+    final connectionProvider = context.read<ConnectionProvider>();
+
+    // Start scanning immediately
+    connectionProvider.startScan();
+
+    showModalBottomSheet(
+      context: context,
+      isScrollControlled: true,
+      backgroundColor: Colors.transparent,
+      builder: (context) => Container(
+        height: MediaQuery.of(context).size.height * 0.9,
+        decoration: const BoxDecoration(
+          color: Color(0xFF1E1E1E),
+          borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
+        ),
+        child: Column(
+          children: [
+            // Header
+            Container(
+              padding: const EdgeInsets.all(16),
+              child: Row(
+                children: [
+                  IconButton(
+                    icon: const Icon(Icons.arrow_back, color: Colors.white),
+                    onPressed: () {
+                      connectionProvider.stopScan();
+                      Navigator.pop(context);
+                    },
+                  ),
+                  const Expanded(
+                    child: Column(
+                      children: [
+                        Text(
+                          'MeshCore',
+                          style: TextStyle(
+                            color: Colors.white,
+                            fontSize: 18,
+                            fontWeight: FontWeight.bold,
+                          ),
+                        ),
+                        Text(
+                          'Scanning for devices...',
+                          style: TextStyle(
+                            color: Colors.grey,
+                            fontSize: 14,
+                          ),
+                        ),
+                      ],
+                    ),
+                  ),
+                  IconButton(
+                    icon: const Icon(Icons.more_vert, color: Colors.white),
+                    onPressed: () {},
+                  ),
+                ],
+              ),
+            ),
+
+            // Info banner
+            Container(
+              margin: const EdgeInsets.symmetric(horizontal: 16),
+              padding: const EdgeInsets.all(16),
+              decoration: BoxDecoration(
+                color: Colors.blue,
+                borderRadius: BorderRadius.circular(8),
+              ),
+              child: const Row(
+                children: [
+                  Icon(Icons.info_outline, color: Colors.white),
+                  SizedBox(width: 12),
+                  Expanded(
+                    child: Text(
+                      'The default pin for devices without a screen is 123456. Trouble pairing? Forget the bluetooth device in system settings.',
+                      style: TextStyle(color: Colors.white, fontSize: 13),
+                    ),
+                  ),
+                ],
+              ),
+            ),
+
+            const SizedBox(height: 16),
+
+            // Device list
+            Expanded(
+              child: Consumer<ConnectionProvider>(
+                builder: (context, provider, child) {
+                  if (provider.isScanning && provider.scannedDevices.isEmpty) {
+                    return const Center(
+                      child: CircularProgressIndicator(),
+                    );
+                  }
+
+                  if (provider.scannedDevices.isEmpty) {
+                    return const Center(
+                      child: Text(
+                        'No devices found',
+                        style: TextStyle(color: Colors.grey, fontSize: 16),
+                      ),
+                    );
+                  }
+
+                  return ListView.builder(
+                    itemCount: provider.scannedDevices.length,
+                    itemBuilder: (context, index) {
+                      final device = provider.scannedDevices[index];
+                      return Container(
+                        margin: const EdgeInsets.symmetric(
+                          horizontal: 16,
+                          vertical: 4,
+                        ),
+                        decoration: BoxDecoration(
+                          color: const Color(0xFF2D2D2D),
+                          borderRadius: BorderRadius.circular(8),
+                        ),
+                        child: ListTile(
+                          leading: const Icon(
+                            Icons.bluetooth,
+                            color: Colors.white,
+                            size: 32,
+                          ),
+                          title: Text(
+                            device.platformName.isNotEmpty
+                                ? device.platformName
+                                : 'Unknown Device',
+                            style: const TextStyle(
+                              color: Colors.white,
+                              fontSize: 16,
+                              fontWeight: FontWeight.w500,
+                            ),
+                          ),
+                          subtitle: const Text(
+                            'Tap to connect',
+                            style: TextStyle(color: Colors.grey, fontSize: 14),
+                          ),
+                          trailing: const Icon(
+                            Icons.chevron_right,
+                            color: Colors.white,
+                          ),
+                          onTap: () async {
+                            Navigator.pop(context);
+                            await provider.connect(device);
+                            if (context.mounted &&
+                                provider.deviceInfo.isConnected) {
+                              final appProvider = context.read<AppProvider>();
+                              await appProvider.initialize();
+                            }
+                          },
+                        ),
+                      );
+                    },
+                  );
+                },
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: _buildCompactStatusBar(),
+        actions: [
+          PopupMenuButton(
+            icon: const Icon(Icons.more_vert),
+            itemBuilder: (context) => [
+              PopupMenuItem(
+                child: const Row(
+                  children: [
+                    Icon(Icons.refresh),
+                    SizedBox(width: 8),
+                    Text('Refresh Contacts'),
+                  ],
+                ),
+                onTap: () async {
+                  final appProvider = context.read<AppProvider>();
+                  await appProvider.refresh();
+                  if (context.mounted) {
+                    ScaffoldMessenger.of(context).showSnackBar(
+                      const SnackBar(content: Text('Refreshed contacts')),
+                    );
+                  }
+                },
+              ),
+              PopupMenuItem(
+                child: const Row(
+                  children: [
+                    Icon(Icons.map),
+                    SizedBox(width: 8),
+                    Text('Map Management'),
+                  ],
+                ),
+                onTap: () {
+                  Future.delayed(Duration.zero, () {
+                    final appProvider = context.read<AppProvider>();
+                    Navigator.push(
+                      context,
+                      MaterialPageRoute(
+                        builder: (context) => MapManagementScreen(
+                          tileCacheService: appProvider.tileCacheService,
+                        ),
+                      ),
+                    );
+                  });
+                },
+              ),
+            ],
+          ),
+        ],
+      ),
+      body: TabBarView(
+        controller: _tabController,
+        children: [
+          MessagesTab(onNavigateToMap: () => _tabController.animateTo(2)),
+          const ContactsTab(),
+          const MapTab(),
+        ],
+      ),
+      bottomNavigationBar: Container(
+        decoration: BoxDecoration(
+          boxShadow: [
+            BoxShadow(
+              color: Colors.black.withOpacity(0.1),
+              blurRadius: 4,
+              offset: const Offset(0, -2),
+            ),
+          ],
+        ),
+        child: TabBar(
+          controller: _tabController,
+          tabs: const [
+            Tab(icon: Icon(Icons.message), text: 'Messages'),
+            Tab(icon: Icon(Icons.contacts), text: 'Contacts'),
+            Tab(icon: Icon(Icons.map), text: 'Map'),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _buildCompactStatusBar() {
+    return Consumer<ConnectionProvider>(
+      builder: (context, provider, child) {
+        final deviceInfo = provider.deviceInfo;
+        final isConnected = deviceInfo.isConnected;
+
+        return Row(
+          children: [
+            Expanded(
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                mainAxisSize: MainAxisSize.min,
+                children: [
+                  const Text(
+                    'MeshCore',
+                    style: TextStyle(
+                      fontSize: 20,
+                      fontWeight: FontWeight.bold,
+                    ),
+                  ),
+                  Text(
+                    isConnected
+                        ? deviceInfo.deviceName ?? 'Connected'
+                        : 'Disconnected',
+                    style: TextStyle(
+                      fontSize: 14,
+                      color: Colors.grey[600],
+                    ),
+                  ),
+                ],
+              ),
+            ),
+            if (!isConnected)
+              ElevatedButton.icon(
+                onPressed: () => _showConnectionDialog(context),
+                icon: const Icon(Icons.bluetooth, size: 18),
+                label: const Text('Connect'),
+                style: ElevatedButton.styleFrom(
+                  backgroundColor: Colors.white,
+                  foregroundColor: Colors.black87,
+                  elevation: 0,
+                  shape: RoundedRectangleBorder(
+                    borderRadius: BorderRadius.circular(20),
+                  ),
+                ),
+              )
+            else
+              OutlinedButton(
+                onPressed: () async {
+                  await provider.disconnect();
+                  if (context.mounted) {
+                    context.read<AppProvider>().clearAllData();
+                  }
+                },
+                style: OutlinedButton.styleFrom(
+                  foregroundColor: Colors.white,
+                  side: const BorderSide(color: Colors.white),
+                  shape: RoundedRectangleBorder(
+                    borderRadius: BorderRadius.circular(20),
+                  ),
+                ),
+                child: const Text('Disconnect'),
+              ),
+          ],
+        );
+      },
+    );
+  }
+
+  Widget _buildStatusBar() {
+    return Consumer<ConnectionProvider>(
+      builder: (context, provider, child) {
+        final deviceInfo = provider.deviceInfo;
+        final isConnected = deviceInfo.isConnected;
+
+        return Container(
+          padding: const EdgeInsets.all(12),
+          color: Theme.of(context).colorScheme.surface,
+          child: Column(
+            children: [
+              Row(
+                children: [
+                  // Connection status
+                  Icon(
+                    isConnected ? Icons.bluetooth_connected : Icons.bluetooth_disabled,
+                    color: isConnected ? Colors.green : Colors.grey,
+                  ),
+                  const SizedBox(width: 8),
+                  Expanded(
+                    child: Text(
+                      isConnected
+                          ? deviceInfo.deviceName ?? 'Connected'
+                          : 'Not Connected',
+                      style: Theme.of(context).textTheme.bodyMedium,
+                    ),
+                  ),
+                  // Battery indicator
+                  if (deviceInfo.batteryPercent != null) ...[
+                    Icon(
+                      _getBatteryIcon(deviceInfo.batteryPercent!),
+                      color: _getBatteryColor(deviceInfo.batteryPercent!),
+                    ),
+                    const SizedBox(width: 4),
+                    Text(
+                      '${deviceInfo.batteryPercent!.round()}%',
+                      style: Theme.of(context).textTheme.bodySmall,
+                    ),
+                  ],
+                  // Signal strength
+                  if (deviceInfo.signalRssi != null) ...[
+                    const SizedBox(width: 12),
+                    Icon(
+                      Icons.signal_cellular_alt,
+                      color: _getSignalColor(deviceInfo.signalRssi!),
+                      size: 20,
+                    ),
+                    const SizedBox(width: 4),
+                    Text(
+                      '${deviceInfo.signalRssi} dBm',
+                      style: Theme.of(context).textTheme.bodySmall,
+                    ),
+                  ],
+                ],
+              ),
+              const SizedBox(height: 8),
+              // Connection buttons
+              Row(
+                children: [
+                  Expanded(
+                    child: ElevatedButton.icon(
+                      onPressed: isConnected
+                          ? null
+                          : () => _showConnectionDialog(context),
+                      icon: const Icon(Icons.bluetooth_searching, size: 18),
+                      label: const Text('Connect'),
+                      style: ElevatedButton.styleFrom(
+                        padding: const EdgeInsets.symmetric(vertical: 8),
+                      ),
+                    ),
+                  ),
+                  const SizedBox(width: 8),
+                  Expanded(
+                    child: OutlinedButton.icon(
+                      onPressed: !isConnected
+                          ? null
+                          : () async {
+                              await provider.disconnect();
+                              if (context.mounted) {
+                                context.read<AppProvider>().clearAllData();
+                              }
+                            },
+                      icon: const Icon(Icons.bluetooth_disabled, size: 18),
+                      label: const Text('Disconnect'),
+                      style: OutlinedButton.styleFrom(
+                        padding: const EdgeInsets.symmetric(vertical: 8),
+                      ),
+                    ),
+                  ),
+                  if (isConnected) ...[
+                    const SizedBox(width: 8),
+                    IconButton(
+                      onPressed: () async {
+                        final appProvider = context.read<AppProvider>();
+                        await appProvider.refresh();
+                        if (context.mounted) {
+                          ScaffoldMessenger.of(context).showSnackBar(
+                            const SnackBar(content: Text('Refreshed contacts')),
+                          );
+                        }
+                      },
+                      icon: const Icon(Icons.refresh),
+                      tooltip: 'Refresh',
+                    ),
+                  ],
+                ],
+              ),
+              // Error message
+              if (provider.error != null) ...[
+                const SizedBox(height: 8),
+                Container(
+                  padding: const EdgeInsets.all(8),
+                  decoration: BoxDecoration(
+                    color: Colors.red.withOpacity(0.1),
+                    borderRadius: BorderRadius.circular(8),
+                  ),
+                  child: Row(
+                    children: [
+                      const Icon(Icons.error, color: Colors.red, size: 16),
+                      const SizedBox(width: 8),
+                      Expanded(
+                        child: Text(
+                          provider.error!,
+                          style: const TextStyle(color: Colors.red, fontSize: 12),
+                        ),
+                      ),
+                      IconButton(
+                        icon: const Icon(Icons.close, size: 16),
+                        onPressed: provider.clearError,
+                        padding: EdgeInsets.zero,
+                        constraints: const BoxConstraints(),
+                      ),
+                    ],
+                  ),
+                ),
+              ],
+            ],
+          ),
+        );
+      },
+    );
+  }
+
+  IconData _getBatteryIcon(double percentage) {
+    if (percentage > 80) return Icons.battery_full;
+    if (percentage > 50) return Icons.battery_5_bar;
+    if (percentage > 20) return Icons.battery_3_bar;
+    return Icons.battery_1_bar;
+  }
+
+  Color _getBatteryColor(double percentage) {
+    if (percentage > 50) return Colors.green;
+    if (percentage > 20) return Colors.orange;
+    return Colors.red;
+  }
+
+  Color _getSignalColor(int rssi) {
+    if (rssi > -60) return Colors.green;
+    if (rssi > -70) return Colors.orange;
+    return Colors.red;
+  }
+}

lib/screens/map_management_screen.dart

@@ -0,0 +1,728 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_map/flutter_map.dart';
+import 'package:latlong2/latlong.dart';
+import 'package:file_picker/file_picker.dart';
+import 'package:share_plus/share_plus.dart';
+import '../services/tile_cache_service.dart';
+import '../models/map_layer.dart';
+
+class MapManagementScreen extends StatefulWidget {
+  final TileCacheService tileCacheService;
+  final MapLayer? initialLayer;
+  final LatLngBounds? initialBounds;
+  final int? initialZoom;
+
+  const MapManagementScreen({
+    super.key,
+    required this.tileCacheService,
+    this.initialLayer,
+    this.initialBounds,
+    this.initialZoom,
+  });
+
+  @override
+  State<MapManagementScreen> createState() => _MapManagementScreenState();
+}
+
+class _MapManagementScreenState extends State<MapManagementScreen> {
+  bool _isLoading = false;
+  String? _statusMessage;
+  Map<String, dynamic>? _cacheStats;
+
+  // Download parameters
+  late MapLayer _selectedLayer;
+  late TextEditingController _northController;
+  late TextEditingController _southController;
+  late TextEditingController _eastController;
+  late TextEditingController _westController;
+  late int _minZoom;
+  late int _maxZoom;
+  double _downloadProgress = 0.0;
+  bool _isDownloading = false;
+
+  @override
+  void initState() {
+    super.initState();
+
+    // Initialize with provided values or defaults
+    _selectedLayer = widget.initialLayer ?? MapLayer.openStreetMap;
+
+    if (widget.initialBounds != null) {
+      _northController = TextEditingController(
+        text: widget.initialBounds!.north.toStringAsFixed(4),
+      );
+      _southController = TextEditingController(
+        text: widget.initialBounds!.south.toStringAsFixed(4),
+      );
+      _eastController = TextEditingController(
+        text: widget.initialBounds!.east.toStringAsFixed(4),
+      );
+      _westController = TextEditingController(
+        text: widget.initialBounds!.west.toStringAsFixed(4),
+      );
+    } else {
+      _northController = TextEditingController(text: '46.1');
+      _southController = TextEditingController(text: '46.0');
+      _eastController = TextEditingController(text: '14.6');
+      _westController = TextEditingController(text: '14.4');
+    }
+
+    // Set zoom levels
+    if (widget.initialZoom != null) {
+      _minZoom = (widget.initialZoom! - 2).clamp(1, 19);
+      _maxZoom = (widget.initialZoom! + 2).clamp(1, 19);
+    } else {
+      _minZoom = 10;
+      _maxZoom = 16;
+    }
+
+    _loadCacheStats();
+  }
+
+  @override
+  void dispose() {
+    _northController.dispose();
+    _southController.dispose();
+    _eastController.dispose();
+    _westController.dispose();
+    super.dispose();
+  }
+
+  Future<void> _loadCacheStats() async {
+    if (!mounted) return;
+    setState(() => _isLoading = true);
+    try {
+      final stats = await widget.tileCacheService.getStoreStats();
+      if (!mounted) return;
+      setState(() {
+        _cacheStats = stats;
+        _isLoading = false;
+      });
+    } catch (e) {
+      if (!mounted) return;
+      setState(() {
+        _statusMessage = 'Error loading stats: $e';
+        _isLoading = false;
+      });
+    }
+  }
+
+  Future<void> _downloadRegion() async {
+    try {
+      final north = double.tryParse(_northController.text);
+      final south = double.tryParse(_southController.text);
+      final east = double.tryParse(_eastController.text);
+      final west = double.tryParse(_westController.text);
+
+      if (north == null || south == null || east == null || west == null) {
+        _showError('Invalid coordinates. Please enter valid numbers.');
+        return;
+      }
+
+      if (north <= south || east <= west) {
+        _showError('Invalid bounds. North must be > South, East must be > West.');
+        return;
+      }
+
+      final bounds = LatLngBounds(
+        LatLng(south, west),
+        LatLng(north, east),
+      );
+
+      if (!mounted) return;
+      setState(() {
+        _isDownloading = true;
+        _downloadProgress = 0.0;
+        _statusMessage = 'Starting download...';
+      });
+
+      await widget.tileCacheService.downloadRegion(
+        layer: _selectedLayer,
+        bounds: bounds,
+        minZoom: _minZoom,
+        maxZoom: _maxZoom,
+        onProgress: (progress) {
+          print('UI received progress update: $progress%');
+          if (!mounted) return;
+          setState(() {
+            _downloadProgress = progress;
+            _statusMessage = 'Downloading map tiles...';
+          });
+        },
+      );
+
+      if (!mounted) return;
+      setState(() {
+        _isDownloading = false;
+        _statusMessage = 'Download completed successfully!';
+      });
+
+      await _loadCacheStats();
+
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          const SnackBar(
+            content: Text('Map download completed!'),
+            backgroundColor: Colors.green,
+          ),
+        );
+      }
+    } catch (e) {
+      if (!mounted) return;
+      setState(() {
+        _isDownloading = false;
+        _statusMessage = 'Download failed: $e';
+      });
+      _showError('Download failed: $e');
+    }
+  }
+
+  Future<void> _cancelDownload() async {
+    try {
+      if (!mounted) return;
+      setState(() => _statusMessage = 'Cancelling download...');
+
+      await widget.tileCacheService.cancelDownload();
+
+      if (!mounted) return;
+      setState(() {
+        _isDownloading = false;
+        _statusMessage = 'Download cancelled';
+      });
+
+      await _loadCacheStats();
+
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          const SnackBar(
+            content: Text('Download cancelled'),
+            backgroundColor: Colors.orange,
+          ),
+        );
+      }
+    } catch (e) {
+      if (!mounted) return;
+      setState(() {
+        _isDownloading = false;
+        _statusMessage = 'Cancel failed: $e';
+      });
+      _showError('Cancel failed: $e');
+    }
+  }
+
+  Future<void> _exportMaps() async {
+    if (!mounted) return;
+    setState(() => _isLoading = true);
+    try {
+      final exportPath = await widget.tileCacheService.exportCache();
+      if (!mounted) return;
+      setState(() => _isLoading = false);
+
+      if (mounted) {
+        await Share.shareXFiles(
+          [XFile(exportPath)],
+          subject: 'MeshCore SAR Maps Export',
+          text: 'Offline maps export from MeshCore SAR',
+        );
+
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(
+            content: Text('Maps exported to: $exportPath'),
+            backgroundColor: Colors.green,
+            duration: const Duration(seconds: 5),
+          ),
+        );
+      }
+    } catch (e) {
+      if (!mounted) return;
+      setState(() => _isLoading = false);
+      _showError('Export failed: $e');
+    }
+  }
+
+  Future<void> _importMaps() async {
+    try {
+      final result = await FilePicker.platform.pickFiles(
+        type: FileType.custom,
+        allowedExtensions: ['fmtc'],
+        allowMultiple: false,
+      );
+
+      if (result == null || result.files.isEmpty) {
+        return;
+      }
+
+      if (!mounted) return;
+      setState(() => _isLoading = true);
+
+      final filePath = result.files.first.path;
+      if (filePath == null) {
+        throw Exception('Invalid file path');
+      }
+
+      await widget.tileCacheService.importCache(filePath);
+
+      if (!mounted) return;
+      setState(() => _isLoading = false);
+      await _loadCacheStats();
+
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          const SnackBar(
+            content: Text('Maps imported successfully!'),
+            backgroundColor: Colors.green,
+          ),
+        );
+      }
+    } catch (e) {
+      if (!mounted) return;
+      setState(() => _isLoading = false);
+      _showError('Import failed: $e');
+    }
+  }
+
+  Future<void> _clearCache() async {
+    final confirmed = await showDialog<bool>(
+      context: context,
+      builder: (context) => AlertDialog(
+        title: const Text('Clear Cache'),
+        content: const Text(
+          'Are you sure you want to delete all downloaded maps? This action cannot be undone.',
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(context, false),
+            child: const Text('Cancel'),
+          ),
+          TextButton(
+            onPressed: () => Navigator.pop(context, true),
+            style: TextButton.styleFrom(foregroundColor: Colors.red),
+            child: const Text('Clear'),
+          ),
+        ],
+      ),
+    );
+
+    if (confirmed != true) return;
+
+    if (!mounted) return;
+    setState(() => _isLoading = true);
+    try {
+      await widget.tileCacheService.clearCache();
+      if (!mounted) return;
+      setState(() => _isLoading = false);
+      await _loadCacheStats();
+
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          const SnackBar(
+            content: Text('Cache cleared successfully!'),
+            backgroundColor: Colors.green,
+          ),
+        );
+      }
+    } catch (e) {
+      setState(() => _isLoading = false);
+      _showError('Clear cache failed: $e');
+    }
+  }
+
+  void _showError(String message) {
+    if (mounted) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(
+          content: Text(message),
+          backgroundColor: Colors.red,
+          duration: const Duration(seconds: 4),
+        ),
+      );
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('Map Management'),
+      ),
+      body: _isLoading
+          ? const Center(child: CircularProgressIndicator())
+          : SingleChildScrollView(
+              padding: const EdgeInsets.all(16),
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.stretch,
+                children: [
+                  // Cache Statistics
+                  _buildStatisticsCard(),
+                  const SizedBox(height: 16),
+
+                  // Download Region
+                  _buildDownloadCard(),
+                  const SizedBox(height: 16),
+
+                  // Import/Export/Clear
+                  _buildActionsCard(),
+                ],
+              ),
+            ),
+    );
+  }
+
+  Widget _buildStatisticsCard() {
+    return Card(
+      child: Padding(
+        padding: const EdgeInsets.all(16),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Row(
+              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+              children: [
+                Text(
+                  'Cache Statistics',
+                  style: Theme.of(context).textTheme.titleLarge,
+                ),
+                IconButton(
+                  icon: const Icon(Icons.refresh),
+                  onPressed: _loadCacheStats,
+                ),
+              ],
+            ),
+            const SizedBox(height: 16),
+            if (_cacheStats != null) ...[
+              _buildStatRow(
+                'Total Tiles',
+                '${_cacheStats!['tileCount'] ?? 0}',
+                Icons.grid_on,
+              ),
+              _buildStatRow(
+                'Cache Size',
+                '${(_cacheStats!['sizeMB'] ?? 0.0).toStringAsFixed(2)} MB',
+                Icons.storage,
+              ),
+              _buildStatRow(
+                'Store Name',
+                _cacheStats!['storeName'] ?? 'Unknown',
+                Icons.folder,
+              ),
+            ] else
+              const Text('No cache statistics available'),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _buildStatRow(String label, String value, IconData icon) {
+    return Padding(
+      padding: const EdgeInsets.symmetric(vertical: 8),
+      child: Row(
+        children: [
+          Icon(icon, size: 20, color: Colors.grey[600]),
+          const SizedBox(width: 12),
+          Expanded(
+            child: Text(label, style: const TextStyle(fontWeight: FontWeight.w500)),
+          ),
+          Text(value, style: TextStyle(color: Colors.grey[600])),
+        ],
+      ),
+    );
+  }
+
+  Widget _buildDownloadCard() {
+    return Card(
+      child: Padding(
+        padding: const EdgeInsets.all(16),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Text(
+              'Download Region',
+              style: Theme.of(context).textTheme.titleLarge,
+            ),
+            const SizedBox(height: 16),
+
+            // Map Layer Selection
+            DropdownButtonFormField<MapLayer>(
+              value: _selectedLayer,
+              decoration: const InputDecoration(
+                labelText: 'Map Layer',
+                border: OutlineInputBorder(),
+              ),
+              items: MapLayer.allLayers.map((layer) {
+                return DropdownMenuItem(
+                  value: layer,
+                  child: Text(layer.name),
+                );
+              }).toList(),
+              onChanged: _isDownloading ? null : (layer) {
+                if (layer != null) {
+                  setState(() => _selectedLayer = layer);
+                }
+              },
+            ),
+            const SizedBox(height: 16),
+
+            // Coordinates
+            Text(
+              'Region Bounds',
+              style: Theme.of(context).textTheme.titleMedium,
+            ),
+            const SizedBox(height: 8),
+            Row(
+              children: [
+                Expanded(
+                  child: TextField(
+                    controller: _northController,
+                    decoration: const InputDecoration(
+                      labelText: 'North',
+                      border: OutlineInputBorder(),
+                      hintText: '46.1',
+                    ),
+                    keyboardType: const TextInputType.numberWithOptions(decimal: true),
+                    enabled: !_isDownloading,
+                  ),
+                ),
+                const SizedBox(width: 8),
+                Expanded(
+                  child: TextField(
+                    controller: _southController,
+                    decoration: const InputDecoration(
+                      labelText: 'South',
+                      border: OutlineInputBorder(),
+                      hintText: '46.0',
+                    ),
+                    keyboardType: const TextInputType.numberWithOptions(decimal: true),
+                    enabled: !_isDownloading,
+                  ),
+                ),
+              ],
+            ),
+            const SizedBox(height: 8),
+            Row(
+              children: [
+                Expanded(
+                  child: TextField(
+                    controller: _eastController,
+                    decoration: const InputDecoration(
+                      labelText: 'East',
+                      border: OutlineInputBorder(),
+                      hintText: '14.6',
+                    ),
+                    keyboardType: const TextInputType.numberWithOptions(decimal: true),
+                    enabled: !_isDownloading,
+                  ),
+                ),
+                const SizedBox(width: 8),
+                Expanded(
+                  child: TextField(
+                    controller: _westController,
+                    decoration: const InputDecoration(
+                      labelText: 'West',
+                      border: OutlineInputBorder(),
+                      hintText: '14.4',
+                    ),
+                    keyboardType: const TextInputType.numberWithOptions(decimal: true),
+                    enabled: !_isDownloading,
+                  ),
+                ),
+              ],
+            ),
+            const SizedBox(height: 16),
+
+            // Zoom Levels
+            Text(
+              'Zoom Levels',
+              style: Theme.of(context).textTheme.titleMedium,
+            ),
+            const SizedBox(height: 8),
+            Row(
+              children: [
+                Expanded(
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: [
+                      Text('Min: $_minZoom'),
+                      Slider(
+                        value: _minZoom.toDouble(),
+                        min: 1,
+                        max: 19,
+                        divisions: 18,
+                        label: '$_minZoom',
+                        onChanged: _isDownloading ? null : (value) {
+                          setState(() {
+                            _minZoom = value.toInt();
+                            if (_minZoom > _maxZoom) {
+                              _maxZoom = _minZoom;
+                            }
+                          });
+                        },
+                      ),
+                    ],
+                  ),
+                ),
+                const SizedBox(width: 16),
+                Expanded(
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: [
+                      Text('Max: $_maxZoom'),
+                      Slider(
+                        value: _maxZoom.toDouble(),
+                        min: 1,
+                        max: 19,
+                        divisions: 18,
+                        label: '$_maxZoom',
+                        onChanged: _isDownloading ? null : (value) {
+                          setState(() {
+                            _maxZoom = value.toInt();
+                            if (_maxZoom < _minZoom) {
+                              _minZoom = _maxZoom;
+                            }
+                          });
+                        },
+                      ),
+                    ],
+                  ),
+                ),
+              ],
+            ),
+
+            // Download Progress
+            if (_isDownloading) ...[
+              const SizedBox(height: 16),
+              Container(
+                padding: const EdgeInsets.all(12),
+                decoration: BoxDecoration(
+                  color: Theme.of(context).colorScheme.primaryContainer,
+                  borderRadius: BorderRadius.circular(8),
+                  border: Border.all(
+                    color: Theme.of(context).colorScheme.primary.withOpacity(0.3),
+                  ),
+                ),
+                child: Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    Row(
+                      mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                      children: [
+                        Text(
+                          _statusMessage ?? 'Downloading...',
+                          style: TextStyle(
+                            fontWeight: FontWeight.w500,
+                            color: Theme.of(context).colorScheme.onPrimaryContainer,
+                          ),
+                        ),
+                        Text(
+                          '${_downloadProgress.toStringAsFixed(1)}%',
+                          style: TextStyle(
+                            fontWeight: FontWeight.bold,
+                            fontSize: 16,
+                            color: Theme.of(context).colorScheme.onPrimaryContainer,
+                          ),
+                        ),
+                      ],
+                    ),
+                    const SizedBox(height: 8),
+                    ClipRRect(
+                      borderRadius: BorderRadius.circular(4),
+                      child: LinearProgressIndicator(
+                        value: _downloadProgress / 100,
+                        minHeight: 8,
+                        backgroundColor: Theme.of(context).colorScheme.primary.withOpacity(0.2),
+                        valueColor: AlwaysStoppedAnimation<Color>(
+                          Theme.of(context).colorScheme.primary,
+                        ),
+                      ),
+                    ),
+                  ],
+                ),
+              ),
+            ],
+
+            const SizedBox(height: 16),
+
+            // Download/Cancel Button
+            if (_isDownloading)
+              ElevatedButton.icon(
+                onPressed: _cancelDownload,
+                icon: const Icon(Icons.cancel),
+                label: const Text('Cancel Download'),
+                style: ElevatedButton.styleFrom(
+                  minimumSize: const Size.fromHeight(48),
+                  backgroundColor: Colors.red,
+                  foregroundColor: Colors.white,
+                ),
+              )
+            else
+              ElevatedButton.icon(
+                onPressed: _downloadRegion,
+                icon: const Icon(Icons.download),
+                label: const Text('Download Region'),
+                style: ElevatedButton.styleFrom(
+                  minimumSize: const Size.fromHeight(48),
+                ),
+              ),
+
+            const SizedBox(height: 8),
+            Text(
+              'Note: Large regions or high zoom levels may take significant time and storage.',
+              style: TextStyle(fontSize: 12, color: Colors.grey[600]),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _buildActionsCard() {
+    return Card(
+      child: Padding(
+        padding: const EdgeInsets.all(16),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Text(
+              'Map Actions',
+              style: Theme.of(context).textTheme.titleLarge,
+            ),
+            const SizedBox(height: 16),
+
+            // Export Button
+            ElevatedButton.icon(
+              onPressed: _isDownloading ? null : _exportMaps,
+              icon: const Icon(Icons.upload),
+              label: const Text('Export Maps'),
+              style: ElevatedButton.styleFrom(
+                minimumSize: const Size.fromHeight(48),
+              ),
+            ),
+            const SizedBox(height: 8),
+
+            // Import Button
+            ElevatedButton.icon(
+              onPressed: _isDownloading ? null : _importMaps,
+              icon: const Icon(Icons.download),
+              label: const Text('Import Maps'),
+              style: ElevatedButton.styleFrom(
+                minimumSize: const Size.fromHeight(48),
+              ),
+            ),
+            const SizedBox(height: 8),
+
+            // Clear Cache Button
+            OutlinedButton.icon(
+              onPressed: _isDownloading ? null : _clearCache,
+              icon: const Icon(Icons.delete_forever),
+              label: const Text('Clear All Maps'),
+              style: OutlinedButton.styleFrom(
+                foregroundColor: Colors.red,
+                minimumSize: const Size.fromHeight(48),
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/screens/map_tab.dart

@@ -0,0 +1,626 @@
+import 'dart:async';
+import 'package:flutter/material.dart';
+import 'package:flutter_map/flutter_map.dart';
+import 'package:latlong2/latlong.dart';
+import 'package:provider/provider.dart';
+import 'package:geolocator/geolocator.dart';
+import '../providers/contacts_provider.dart';
+import '../providers/messages_provider.dart';
+import '../providers/map_provider.dart';
+import '../providers/app_provider.dart';
+import '../models/contact.dart';
+import '../models/sar_marker.dart';
+import '../models/map_layer.dart';
+import '../services/tile_cache_service.dart';
+import '../widgets/map_markers.dart';
+import 'map_management_screen.dart';
+
+class MapTab extends StatefulWidget {
+  const MapTab({super.key});
+
+  @override
+  State<MapTab> createState() => _MapTabState();
+}
+
+class _MapTabState extends State<MapTab> {
+  final MapController _mapController = MapController();
+  final TileCacheService _tileCache = TileCacheService();
+  bool _isInitialized = false;
+  MapLayer _currentLayer = MapLayer.openStreetMap;
+  Position? _currentPosition;
+  bool _showLegend = true;
+  double _gpsUpdateDistance = 3.0; // meters
+  StreamSubscription<Position>? _positionStreamSubscription;
+
+  // Default center point (will be updated based on markers)
+  static const LatLng _defaultCenter = LatLng(46.0569, 14.5058); // Ljubljana, Slovenia
+  static const double _defaultZoom = 13.0;
+
+  @override
+  void initState() {
+    super.initState();
+    _initializeTileCache();
+    _requestLocationPermission();
+
+    // Listen to map provider for navigation requests
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      final mapProvider = context.read<MapProvider>();
+      mapProvider.addListener(_handleMapNavigation);
+    });
+  }
+
+  Future<void> _requestLocationPermission() async {
+    bool serviceEnabled = await Geolocator.isLocationServiceEnabled();
+    if (!serviceEnabled) {
+      return;
+    }
+
+    LocationPermission permission = await Geolocator.checkPermission();
+    if (permission == LocationPermission.denied) {
+      permission = await Geolocator.requestPermission();
+      if (permission == LocationPermission.denied) {
+        return;
+      }
+    }
+
+    if (permission == LocationPermission.deniedForever) {
+      return;
+    }
+
+    // Get initial position
+    try {
+      final position = await Geolocator.getCurrentPosition(
+        locationSettings: const LocationSettings(
+          accuracy: LocationAccuracy.best,
+          distanceFilter: 0,
+        ),
+      );
+      if (mounted) {
+        setState(() {
+          _currentPosition = position;
+        });
+      }
+    } catch (e) {
+      debugPrint('Error getting location: $e');
+    }
+
+    // Start listening to location updates
+    _positionStreamSubscription = Geolocator.getPositionStream(
+      locationSettings: LocationSettings(
+        accuracy: LocationAccuracy.best,
+        distanceFilter: _gpsUpdateDistance.toInt(),
+      ),
+    ).listen((Position position) {
+      if (mounted) {
+        setState(() {
+          _currentPosition = position;
+        });
+      }
+    });
+  }
+
+  void _handleMapNavigation() {
+    final mapProvider = context.read<MapProvider>();
+    if (mapProvider.targetLocation != null && _isInitialized) {
+      _mapController.move(
+        mapProvider.targetLocation!,
+        mapProvider.targetZoom ?? _defaultZoom,
+      );
+      // Clear the navigation request after handling
+      mapProvider.clearNavigation();
+    }
+  }
+
+  Future<void> _initializeTileCache() async {
+    try {
+      await _tileCache.initialize();
+      if (mounted) {
+        setState(() {
+          _isInitialized = true;
+        });
+      }
+    } catch (e) {
+      debugPrint('Error initializing tile cache: $e');
+      if (mounted) {
+        setState(() {
+          _isInitialized = true; // Continue without caching
+        });
+      }
+    }
+  }
+
+  @override
+  void dispose() {
+    final mapProvider = context.read<MapProvider>();
+    mapProvider.removeListener(_handleMapNavigation);
+    _positionStreamSubscription?.cancel();
+    _mapController.dispose();
+    _tileCache.dispose();
+    super.dispose();
+  }
+
+  LatLng _calculateCenter(List<Contact> contacts, List<SarMarker> sarMarkers) {
+    final allPoints = <LatLng>[];
+
+    for (final contact in contacts) {
+      if (contact.displayLocation != null) {
+        allPoints.add(contact.displayLocation!);
+      }
+    }
+
+    for (final marker in sarMarkers) {
+      allPoints.add(marker.location);
+    }
+
+    if (allPoints.isEmpty) return _defaultCenter;
+
+    double lat = 0, lng = 0;
+    for (final point in allPoints) {
+      lat += point.latitude;
+      lng += point.longitude;
+    }
+
+    return LatLng(lat / allPoints.length, lng / allPoints.length);
+  }
+
+  void _showLayerSelector(BuildContext context) {
+    showModalBottomSheet(
+      context: context,
+      builder: (context) => Container(
+        padding: const EdgeInsets.symmetric(vertical: 16),
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Padding(
+              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+              child: Row(
+                children: [
+                  const Icon(Icons.layers),
+                  const SizedBox(width: 12),
+                  Expanded(
+                    child: Text(
+                      'Select Map Layer',
+                      style: Theme.of(context).textTheme.titleMedium?.copyWith(
+                            fontWeight: FontWeight.bold,
+                          ),
+                    ),
+                  ),
+                  IconButton(
+                    icon: const Icon(Icons.download),
+                    tooltip: 'Download visible area',
+                    onPressed: () {
+                      Navigator.pop(context);
+                      _navigateToDownload(context);
+                    },
+                  ),
+                ],
+              ),
+            ),
+            const Divider(),
+            ...MapLayer.allLayers.map((layer) => ListTile(
+                  leading: _currentLayer.type == layer.type
+                      ? const Icon(Icons.check_circle, color: Colors.green)
+                      : const Icon(Icons.radio_button_unchecked),
+                  title: Text(layer.name),
+                  subtitle: Text(layer.attribution),
+                  onTap: () {
+                    setState(() {
+                      _currentLayer = layer;
+                    });
+                    Navigator.pop(context);
+                  },
+                )),
+          ],
+        ),
+      ),
+    );
+  }
+
+  void _navigateToDownload(BuildContext context) {
+    // Get current map bounds
+    final bounds = _mapController.camera.visibleBounds;
+    final currentZoom = _mapController.camera.zoom.round();
+
+    // Navigate to Map Management screen with pre-populated data
+    final appProvider = context.read<AppProvider>();
+    Navigator.push(
+      context,
+      MaterialPageRoute(
+        builder: (context) => MapManagementScreen(
+          tileCacheService: appProvider.tileCacheService,
+          initialLayer: _currentLayer,
+          initialBounds: bounds,
+          initialZoom: currentZoom,
+        ),
+      ),
+    );
+  }
+
+  void _showOptionsMenu(BuildContext context) {
+    showModalBottomSheet(
+      context: context,
+      builder: (context) => StatefulBuilder(
+        builder: (context, setModalState) => Container(
+          padding: const EdgeInsets.symmetric(vertical: 16),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              Padding(
+                padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+                child: Row(
+                  children: [
+                    const Icon(Icons.settings),
+                    const SizedBox(width: 12),
+                    Text(
+                      'Map Options',
+                      style: Theme.of(context).textTheme.titleMedium?.copyWith(
+                            fontWeight: FontWeight.bold,
+                          ),
+                    ),
+                  ],
+                ),
+              ),
+              const Divider(),
+              // Legend toggle
+              SwitchListTile(
+                secondary: const Icon(Icons.info_outline),
+                title: const Text('Show Legend'),
+                subtitle: const Text('Display marker type counts'),
+                value: _showLegend,
+                onChanged: (value) {
+                  setState(() {
+                    _showLegend = value;
+                  });
+                  setModalState(() {});
+                },
+              ),
+              const Divider(),
+              // GPS Update Distance
+              ListTile(
+                leading: const Icon(Icons.gps_fixed),
+                title: const Text('GPS Update Distance'),
+                subtitle: Text('${_gpsUpdateDistance.toStringAsFixed(0)} meters'),
+              ),
+              Padding(
+                padding: const EdgeInsets.symmetric(horizontal: 16),
+                child: Column(
+                  children: [
+                    Slider(
+                      value: _gpsUpdateDistance,
+                      min: 1,
+                      max: 20,
+                      divisions: 19,
+                      label: '${_gpsUpdateDistance.toStringAsFixed(0)}m',
+                      onChanged: (value) {
+                        setModalState(() {
+                          _gpsUpdateDistance = value;
+                        });
+                      },
+                      onChangeEnd: (value) {
+                        setState(() {
+                          _gpsUpdateDistance = value;
+                        });
+                        // Restart location stream with new distance
+                        _restartLocationStream();
+                      },
+                    ),
+                    Padding(
+                      padding: const EdgeInsets.symmetric(horizontal: 8),
+                      child: Row(
+                        mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                        children: [
+                          Text(
+                            '1m',
+                            style: Theme.of(context).textTheme.bodySmall,
+                          ),
+                          Text(
+                            '20m',
+                            style: Theme.of(context).textTheme.bodySmall,
+                          ),
+                        ],
+                      ),
+                    ),
+                  ],
+                ),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+
+  void _restartLocationStream() {
+    // Cancel existing subscription
+    _positionStreamSubscription?.cancel();
+
+    // Start new stream with updated distance
+    _positionStreamSubscription = Geolocator.getPositionStream(
+      locationSettings: LocationSettings(
+        accuracy: LocationAccuracy.best,
+        distanceFilter: _gpsUpdateDistance.toInt(),
+      ),
+    ).listen((Position position) {
+      if (mounted) {
+        setState(() {
+          _currentPosition = position;
+        });
+      }
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Consumer2<ContactsProvider, MessagesProvider>(
+      builder: (context, contactsProvider, messagesProvider, child) {
+        final contactsWithLocation = contactsProvider.chatContactsWithLocation;
+        final sarMarkers = messagesProvider.sarMarkers;
+        final center = _calculateCenter(contactsWithLocation, sarMarkers);
+
+        return Stack(
+          children: [
+            // Map widget
+            _isInitialized
+                ? FlutterMap(
+                    mapController: _mapController,
+                    options: MapOptions(
+                      initialCenter: center,
+                      initialZoom: _defaultZoom,
+                      minZoom: 5,
+                      maxZoom: 18,
+                      interactionOptions: const InteractionOptions(
+                        flags: InteractiveFlag.all,
+                      ),
+                    ),
+                    children: [
+                      TileLayer(
+                        urlTemplate: _currentLayer.urlTemplate,
+                        tileProvider: _tileCache.getTileProvider(_currentLayer),
+                        userAgentPackageName: 'com.meshcore.sar',
+                        maxZoom: _currentLayer.maxZoom.toDouble(),
+                      ),
+                      MarkerLayer(
+                        markers: [
+                          ...MapMarkers.createTeamMemberMarkers(
+                            contactsWithLocation,
+                            context,
+                          ),
+                          ...MapMarkers.createSarMarkers(
+                            sarMarkers,
+                            context,
+                          ),
+                          // User location marker
+                          if (_currentPosition != null)
+                            Marker(
+                              point: LatLng(
+                                _currentPosition!.latitude,
+                                _currentPosition!.longitude,
+                              ),
+                              width: 40,
+                              height: 40,
+                              child: Container(
+                                decoration: BoxDecoration(
+                                  color: Colors.blue.withOpacity(0.3),
+                                  shape: BoxShape.circle,
+                                ),
+                                child: Container(
+                                  margin: const EdgeInsets.all(8),
+                                  decoration: const BoxDecoration(
+                                    color: Colors.blue,
+                                    shape: BoxShape.circle,
+                                    boxShadow: [
+                                      BoxShadow(
+                                        color: Colors.black26,
+                                        blurRadius: 4,
+                                      ),
+                                    ],
+                                  ),
+                                  child: const Icon(
+                                    Icons.navigation,
+                                    color: Colors.white,
+                                    size: 16,
+                                  ),
+                                ),
+                              ),
+                            ),
+                        ],
+                      ),
+                    ],
+                  )
+                : Center(
+                    child: Column(
+                      mainAxisAlignment: MainAxisAlignment.center,
+                      children: [
+                        const CircularProgressIndicator(),
+                        const SizedBox(height: 16),
+                        Text(
+                          'Initializing map...',
+                          style: Theme.of(context).textTheme.bodyMedium,
+                        ),
+                      ],
+                    ),
+                  ),
+            // Map legend overlay
+            if (_showLegend)
+              Positioned(
+                top: 16,
+                right: 16,
+                child: _MapLegend(
+                  teamMemberCount: contactsWithLocation.length,
+                  foundPersonCount: messagesProvider.foundPersonMarkers.length,
+                  fireCount: messagesProvider.fireMarkers.length,
+                  stagingAreaCount: messagesProvider.stagingAreaMarkers.length,
+                ),
+              ),
+            // Map controls - right side
+            Positioned(
+              bottom: 16,
+              right: 16,
+              child: Column(
+                children: [
+                  FloatingActionButton.small(
+                    heroTag: 'center_map',
+                    onPressed: () async {
+                      // Force update GPS location and jump to it
+                      try {
+                        final position = await Geolocator.getCurrentPosition(
+                          locationSettings: const LocationSettings(
+                            accuracy: LocationAccuracy.best,
+                            distanceFilter: 0,
+                          ),
+                        );
+                        if (mounted) {
+                          setState(() {
+                            _currentPosition = position;
+                          });
+                          _mapController.move(
+                            LatLng(position.latitude, position.longitude),
+                            16,
+                          );
+                        }
+                      } catch (e) {
+                        debugPrint('Error getting location: $e');
+                        // Fallback to cached position or default center
+                        if (_currentPosition != null) {
+                          _mapController.move(
+                            LatLng(
+                              _currentPosition!.latitude,
+                              _currentPosition!.longitude,
+                            ),
+                            16,
+                          );
+                        } else {
+                          _mapController.move(center, _defaultZoom);
+                        }
+                      }
+                    },
+                    child: const Icon(Icons.my_location),
+                  ),
+                  const SizedBox(height: 8),
+                  FloatingActionButton.small(
+                    heroTag: 'layer_selector',
+                    onPressed: () => _showLayerSelector(context),
+                    child: const Icon(Icons.layers),
+                  ),
+                  const SizedBox(height: 8),
+                  FloatingActionButton.small(
+                    heroTag: 'options_menu',
+                    onPressed: () => _showOptionsMenu(context),
+                    child: const Icon(Icons.more_vert),
+                  ),
+                ],
+              ),
+            ),
+          ],
+        );
+      },
+    );
+  }
+}
+
+class _MapLegend extends StatelessWidget {
+  final int teamMemberCount;
+  final int foundPersonCount;
+  final int fireCount;
+  final int stagingAreaCount;
+
+  const _MapLegend({
+    required this.teamMemberCount,
+    required this.foundPersonCount,
+    required this.fireCount,
+    required this.stagingAreaCount,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Card(
+      child: Padding(
+        padding: const EdgeInsets.all(12),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Text(
+              'Legend',
+              style: Theme.of(context).textTheme.titleSmall?.copyWith(
+                    fontWeight: FontWeight.bold,
+                  ),
+            ),
+            const SizedBox(height: 8),
+            _LegendItem(
+              icon: Icons.person,
+              color: Colors.blue,
+              label: 'Team',
+              count: teamMemberCount,
+            ),
+            _LegendItem(
+              icon: Icons.person_pin,
+              color: Colors.green,
+              label: 'Found',
+              count: foundPersonCount,
+            ),
+            _LegendItem(
+              icon: Icons.local_fire_department,
+              color: Colors.red,
+              label: 'Fire',
+              count: fireCount,
+            ),
+            _LegendItem(
+              icon: Icons.home_work,
+              color: Colors.orange,
+              label: 'Staging',
+              count: stagingAreaCount,
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class _LegendItem extends StatelessWidget {
+  final IconData icon;
+  final Color color;
+  final String label;
+  final int count;
+
+  const _LegendItem({
+    required this.icon,
+    required this.color,
+    required this.label,
+    required this.count,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.symmetric(vertical: 4),
+      child: Row(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Icon(icon, size: 16, color: color),
+          const SizedBox(width: 8),
+          Text(
+            label,
+            style: Theme.of(context).textTheme.bodySmall,
+          ),
+          const SizedBox(width: 4),
+          Container(
+            padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 1),
+            decoration: BoxDecoration(
+              color: color.withOpacity(0.2),
+              borderRadius: BorderRadius.circular(8),
+            ),
+            child: Text(
+              count.toString(),
+              style: Theme.of(context).textTheme.labelSmall?.copyWith(
+                    fontWeight: FontWeight.bold,
+                  ),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}
+

lib/screens/messages_tab.dart

@@ -0,0 +1,205 @@
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import '../providers/messages_provider.dart';
+import '../providers/contacts_provider.dart';
+import '../providers/map_provider.dart';
+import '../models/message.dart';
+import '../utils/sar_message_parser.dart';
+
+class MessagesTab extends StatelessWidget {
+  final VoidCallback onNavigateToMap;
+
+  const MessagesTab({super.key, required this.onNavigateToMap});
+
+  @override
+  Widget build(BuildContext context) {
+    return Consumer<MessagesProvider>(
+      builder: (context, messagesProvider, child) {
+        final messages = messagesProvider.getRecentMessages(count: 100);
+
+        if (messages.isEmpty) {
+          return Center(
+            child: Column(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [
+                Icon(
+                  Icons.message_outlined,
+                  size: 64,
+                  color: Theme.of(context).disabledColor,
+                ),
+                const SizedBox(height: 16),
+                Text(
+                  'No messages yet',
+                  style: Theme.of(context).textTheme.titleLarge,
+                ),
+                const SizedBox(height: 8),
+                Text(
+                  'Connect to a device to start receiving messages',
+                  style: Theme.of(context).textTheme.bodyMedium,
+                  textAlign: TextAlign.center,
+                ),
+              ],
+            ),
+          );
+        }
+
+        return ListView.builder(
+          reverse: true,
+          padding: const EdgeInsets.all(8),
+          itemCount: messages.length,
+          itemBuilder: (context, index) {
+            final message = messages[index];
+            return _MessageBubble(
+              message: message,
+              onTap: message.isSarMarker && message.sarGpsCoordinates != null
+                  ? () {
+                      final mapProvider = context.read<MapProvider>();
+                      mapProvider.navigateToLocation(
+                        location: message.sarGpsCoordinates!,
+                        zoom: 15.0,
+                      );
+                      onNavigateToMap();
+                    }
+                  : null,
+            );
+          },
+        );
+      },
+    );
+  }
+}
+
+class _MessageBubble extends StatelessWidget {
+  final Message message;
+  final VoidCallback? onTap;
+
+  const _MessageBubble({
+    required this.message,
+    this.onTap,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final isSarMarker = message.isSarMarker;
+
+    return GestureDetector(
+      onTap: onTap,
+      child: Container(
+        margin: const EdgeInsets.only(bottom: 8),
+        padding: const EdgeInsets.all(12),
+        decoration: BoxDecoration(
+          color: isSarMarker
+              ? _getSarMarkerColor(context)
+              : Theme.of(context).colorScheme.surfaceVariant,
+          borderRadius: BorderRadius.circular(12),
+          border: isSarMarker
+              ? Border.all(
+                  color: Theme.of(context).colorScheme.primary,
+                  width: 2,
+                )
+              : null,
+        ),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            // Header: Sender and time
+            Row(
+              children: [
+                if (message.isChannelMessage)
+                  const Icon(Icons.tag, size: 16)
+                else
+                  const Icon(Icons.person, size: 16),
+                const SizedBox(width: 4),
+                Text(
+                  message.displaySender,
+                  style: Theme.of(context).textTheme.labelMedium?.copyWith(
+                        fontWeight: FontWeight.bold,
+                      ),
+                ),
+                const Spacer(),
+                if (isSarMarker)
+                  Container(
+                    padding: const EdgeInsets.symmetric(
+                      horizontal: 6,
+                      vertical: 2,
+                    ),
+                    decoration: BoxDecoration(
+                      color: Theme.of(context).colorScheme.primary,
+                      borderRadius: BorderRadius.circular(4),
+                    ),
+                    child: Text(
+                      'SAR',
+                      style: Theme.of(context).textTheme.labelSmall?.copyWith(
+                            color: Theme.of(context).colorScheme.onPrimary,
+                            fontWeight: FontWeight.bold,
+                          ),
+                    ),
+                  ),
+                const SizedBox(width: 8),
+                Text(
+                  message.timeAgo,
+                  style: Theme.of(context).textTheme.labelSmall,
+                ),
+              ],
+            ),
+            const SizedBox(height: 8),
+
+            // SAR marker content
+            if (isSarMarker && message.sarMarkerType != null) ...[
+              Row(
+                children: [
+                  Text(
+                    message.sarMarkerType!.emoji,
+                    style: const TextStyle(fontSize: 32),
+                  ),
+                  const SizedBox(width: 12),
+                  Expanded(
+                    child: Column(
+                      crossAxisAlignment: CrossAxisAlignment.start,
+                      children: [
+                        Text(
+                          message.sarMarkerType!.displayName,
+                          style:
+                              Theme.of(context).textTheme.titleMedium?.copyWith(
+                                    fontWeight: FontWeight.bold,
+                                  ),
+                        ),
+                        if (message.sarGpsCoordinates != null)
+                          Text(
+                            '${message.sarGpsCoordinates!.latitude.toStringAsFixed(5)}, ${message.sarGpsCoordinates!.longitude.toStringAsFixed(5)}',
+                            style: Theme.of(context).textTheme.bodySmall,
+                          ),
+                      ],
+                    ),
+                  ),
+                  Icon(
+                    Icons.chevron_right,
+                    color: Theme.of(context).colorScheme.primary,
+                  ),
+                ],
+              ),
+              const SizedBox(height: 4),
+              Text(
+                'Tap to view on map',
+                style: Theme.of(context).textTheme.labelSmall?.copyWith(
+                      color: Theme.of(context).colorScheme.primary,
+                      fontStyle: FontStyle.italic,
+                    ),
+              ),
+            ]
+            // Regular message content
+            else
+              Text(
+                message.text,
+                style: Theme.of(context).textTheme.bodyMedium,
+              ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Color _getSarMarkerColor(BuildContext context) {
+    return Theme.of(context).colorScheme.primaryContainer;
+  }
+}

lib/services/buffer_reader.dart

@@ -0,0 +1,139 @@
+import 'dart:typed_data';
+import 'dart:convert';
+
+/// Buffer reader for parsing MeshCore protocol binary data
+class BufferReader {
+  final Uint8List _buffer;
+  int _offset = 0;
+
+  BufferReader(this._buffer);
+
+  /// Get remaining bytes count
+  int get remainingBytesCount => _buffer.length - _offset;
+
+  /// Check if there are bytes remaining
+  bool get hasRemaining => _offset < _buffer.length;
+
+  /// Get current offset
+  int get offset => _offset;
+
+  /// Set offset
+  set offset(int value) => _offset = value;
+
+  /// Read a single byte (uint8)
+  int readByte() {
+    if (_offset >= _buffer.length) {
+      throw Exception('Buffer overflow: attempting to read beyond buffer length');
+    }
+    return _buffer[_offset++];
+  }
+
+  /// Read a signed byte (int8)
+  int readInt8() {
+    final value = readByte();
+    return value > 127 ? value - 256 : value;
+  }
+
+  /// Read unsigned 16-bit integer (little-endian)
+  int readUInt16LE() {
+    if (_offset + 2 > _buffer.length) {
+      throw Exception('Buffer overflow: attempting to read beyond buffer length');
+    }
+    final value = _buffer[_offset] | (_buffer[_offset + 1] << 8);
+    _offset += 2;
+    return value;
+  }
+
+  /// Read signed 16-bit integer (little-endian)
+  int readInt16LE() {
+    final value = readUInt16LE();
+    return value > 32767 ? value - 65536 : value;
+  }
+
+  /// Read unsigned 32-bit integer (little-endian)
+  int readUInt32LE() {
+    if (_offset + 4 > _buffer.length) {
+      throw Exception('Buffer overflow: attempting to read beyond buffer length');
+    }
+    final value = _buffer[_offset] |
+        (_buffer[_offset + 1] << 8) |
+        (_buffer[_offset + 2] << 16) |
+        (_buffer[_offset + 3] << 24);
+    _offset += 4;
+    return value;
+  }
+
+  /// Read signed 32-bit integer (little-endian)
+  int readInt32LE() {
+    final value = readUInt32LE();
+    return value > 2147483647 ? value - 4294967296 : value;
+  }
+
+  /// Read a fixed number of bytes
+  Uint8List readBytes(int length) {
+    if (_offset + length > _buffer.length) {
+      throw Exception('Buffer overflow: attempting to read beyond buffer length');
+    }
+    final bytes = _buffer.sublist(_offset, _offset + length);
+    _offset += length;
+    return bytes;
+  }
+
+  /// Read remaining bytes
+  Uint8List readRemainingBytes() {
+    final bytes = _buffer.sublist(_offset);
+    _offset = _buffer.length;
+    return bytes;
+  }
+
+  /// Read null-terminated string (C-string) with max length
+  String readCString(int maxLength) {
+    if (_offset + maxLength > _buffer.length) {
+      throw Exception('Buffer overflow: attempting to read beyond buffer length');
+    }
+
+    final bytes = _buffer.sublist(_offset, _offset + maxLength);
+    _offset += maxLength;
+
+    // Find null terminator
+    int nullIndex = bytes.indexOf(0);
+    if (nullIndex == -1) {
+      nullIndex = maxLength;
+    }
+
+    // Decode string up to null terminator
+    return utf8.decode(bytes.sublist(0, nullIndex));
+  }
+
+  /// Read length-prefixed string (remaining bytes as UTF-8)
+  String readString() {
+    final bytes = readRemainingBytes();
+    return utf8.decode(bytes);
+  }
+
+  /// Peek at next byte without advancing offset
+  int peekByte() {
+    if (_offset >= _buffer.length) {
+      throw Exception('Buffer overflow: attempting to peek beyond buffer length');
+    }
+    return _buffer[_offset];
+  }
+
+  /// Skip bytes
+  void skip(int count) {
+    if (_offset + count > _buffer.length) {
+      throw Exception('Buffer overflow: attempting to skip beyond buffer length');
+    }
+    _offset += count;
+  }
+
+  /// Reset offset to beginning
+  void reset() {
+    _offset = 0;
+  }
+
+  @override
+  String toString() {
+    return 'BufferReader(length: ${_buffer.length}, offset: $_offset, remaining: $remainingBytesCount)';
+  }
+}

lib/services/buffer_writer.dart

@@ -0,0 +1,129 @@
+import 'dart:typed_data';
+import 'dart:convert';
+
+/// Buffer writer for creating MeshCore protocol binary data
+class BufferWriter {
+  final List<int> _buffer = [];
+
+  /// Get current buffer length
+  int get length => _buffer.length;
+
+  /// Write a single byte (uint8)
+  void writeByte(int value) {
+    if (value < 0 || value > 255) {
+      throw ArgumentError('Byte value must be between 0 and 255');
+    }
+    _buffer.add(value);
+  }
+
+  /// Write a signed byte (int8)
+  void writeInt8(int value) {
+    if (value < -128 || value > 127) {
+      throw ArgumentError('Int8 value must be between -128 and 127');
+    }
+    _buffer.add(value < 0 ? value + 256 : value);
+  }
+
+  /// Write unsigned 16-bit integer (little-endian)
+  void writeUInt16LE(int value) {
+    if (value < 0 || value > 65535) {
+      throw ArgumentError('UInt16 value must be between 0 and 65535');
+    }
+    _buffer.add(value & 0xFF);
+    _buffer.add((value >> 8) & 0xFF);
+  }
+
+  /// Write signed 16-bit integer (little-endian)
+  void writeInt16LE(int value) {
+    if (value < -32768 || value > 32767) {
+      throw ArgumentError('Int16 value must be between -32768 and 32767');
+    }
+    final unsigned = value < 0 ? value + 65536 : value;
+    writeUInt16LE(unsigned);
+  }
+
+  /// Write unsigned 32-bit integer (little-endian)
+  void writeUInt32LE(int value) {
+    if (value < 0 || value > 4294967295) {
+      throw ArgumentError('UInt32 value must be between 0 and 4294967295');
+    }
+    _buffer.add(value & 0xFF);
+    _buffer.add((value >> 8) & 0xFF);
+    _buffer.add((value >> 16) & 0xFF);
+    _buffer.add((value >> 24) & 0xFF);
+  }
+
+  /// Write signed 32-bit integer (little-endian)
+  void writeInt32LE(int value) {
+    if (value < -2147483648 || value > 2147483647) {
+      throw ArgumentError('Int32 value must be between -2147483648 and 2147483647');
+    }
+    final unsigned = value < 0 ? value + 4294967296 : value;
+    writeUInt32LE(unsigned);
+  }
+
+  /// Write bytes from Uint8List
+  void writeBytes(Uint8List bytes) {
+    _buffer.addAll(bytes);
+  }
+
+  /// Write bytes from List<int>
+  void writeBytesFromList(List<int> bytes) {
+    _buffer.addAll(bytes);
+  }
+
+  /// Write null-terminated string (C-string) with fixed length
+  /// Pads with zeros if string is shorter than maxLength
+  void writeCString(String str, int maxLength) {
+    final bytes = utf8.encode(str);
+
+    // Ensure we don't exceed max length
+    final length = bytes.length < maxLength ? bytes.length : maxLength;
+
+    // Write string bytes
+    for (int i = 0; i < length; i++) {
+      _buffer.add(bytes[i]);
+    }
+
+    // Pad with zeros
+    for (int i = length; i < maxLength; i++) {
+      _buffer.add(0);
+    }
+  }
+
+  /// Write length-prefixed string
+  void writeString(String str) {
+    final bytes = utf8.encode(str);
+    _buffer.addAll(bytes);
+  }
+
+  /// Write string with length prefix (1 byte)
+  void writeLengthPrefixedString(String str) {
+    final bytes = utf8.encode(str);
+    if (bytes.length > 255) {
+      throw ArgumentError('String too long for length-prefixed format (max 255 bytes)');
+    }
+    writeByte(bytes.length);
+    _buffer.addAll(bytes);
+  }
+
+  /// Get buffer as Uint8List
+  Uint8List toBytes() {
+    return Uint8List.fromList(_buffer);
+  }
+
+  /// Clear the buffer
+  void clear() {
+    _buffer.clear();
+  }
+
+  /// Get buffer as hex string (for debugging)
+  String toHexString() {
+    return _buffer.map((b) => b.toRadixString(16).padLeft(2, '0')).join(' ');
+  }
+
+  @override
+  String toString() {
+    return 'BufferWriter(length: $length, hex: ${toHexString()})';
+  }
+}