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83 lines
3.5 KiB
Markdown
83 lines
3.5 KiB
Markdown
<p align="center">
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<img src="./icon.png" alt="MeshCore SAR icon" width="120" />
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</p>
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<h1 align="center">MeshCore SAR</h1>
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<p align="center">
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Field-ready Search and Rescue coordination over <a href="https://github.com/meshcore-dev">MeshCore</a> + BLE
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</p>
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<p align="center">
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<img alt="Platform" src="https://img.shields.io/badge/platform-iOS%20%7C%20Android-blue" />
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<img alt="Mode" src="https://img.shields.io/badge/offline-first-success" />
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<img alt="Use case" src="https://img.shields.io/badge/use%20case-SAR-orange" />
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</p>
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MeshCore SAR helps teams coordinate in low-connectivity or no-connectivity environments with messaging, voice, images, maps, and live location context in one app.
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It uses the MeshCore protocol over LoRa for long-range, infrastructure-free communication.
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## Highlights
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- Rapid mesh chat for both 1:1 and group coordination
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- On-demand voice (Codec2) and image (AVIF) transfer tuned for low-bandwidth links
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- Offline-first mapping with tactical overlays and SAR incident markers
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- Live team location, movement trails, and shareable tactical drawings
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## Demo Video
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[<img width="1280" height="720" alt="MeshCore SAR demo preview" src="https://github.com/user-attachments/assets/13ccacee-7306-4976-a408-f31f3336828a" />](https://youtu.be/rLsKeLJBpFg)
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## Screenshots
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<p align="center">
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<img src="./screenshots/ios/IMG_2953.PNG" alt="Map view with live team context" width="19%" />
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<img src="./screenshots/ios/IMG_2954.PNG" alt="Compass and navigation view" width="19%" />
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<img src="./screenshots/ios/IMG_2955.PNG" alt="Contacts and repeaters list" width="19%" />
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<img src="./screenshots/ios/IMG_2956.PNG" alt="Messages with voice and image cards" width="19%" />
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<img src="./screenshots/ios/IMG_2957.PNG" alt="Quick actions sheet for SAR, voice, and image" width="19%" />
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</p>
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## Feature Overview
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| Area | What you get |
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|---|---|
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| Messaging | Direct and group chat over mesh, with contact/room awareness from live telemetry |
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| Voice | Push-to-talk voice clips (Codec2), fetched on demand when play is pressed, auto-play on completion |
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| Images | Camera/gallery image sending (AVIF), auto-compression, tap-to-load receiving, full-screen viewer |
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| Maps | Street/topo/satellite/terrain layers, offline tile downloads, optional MBTiles import |
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| SAR Operations | Team markers with freshness indicators, SAR markers for incidents and staging points |
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| Tracking | Continuous GPS updates, personal trails, distance/duration trail stats |
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| Trail Interop | GPX export/import for trail sharing and reuse |
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| Tactical Drawing | Line/rectangle drawing, distance measurement, drawing sharing to channel/room |
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## Voice, Image, and Maps
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### Voice
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- Built for short, urgent field communication
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- On-demand playback fetch reduces unnecessary mesh traffic
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- Ideal when typing is impractical during active operations
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### Images
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- Pre-send optimization for constrained links
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- Tap-to-load receiving keeps channels lightweight
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- Full-screen view supports rapid field verification
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### Maps
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- Works in both online and offline workflows
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- SAR context with team markers, incident markers, and orientation tools
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- Combines location, messaging, and tactical layers in one place
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## Built For
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- Search and Rescue field teams
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- Incident command and coordination roles
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- Operators working in weak/no cellular coverage
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## Permissions (App Use)
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- Bluetooth: mesh device communication
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- Location: team tracking and map position updates
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- Microphone: voice clip recording
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- Camera / Photos: image messaging
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