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feat: Enhance message sending feedback and improve reconnection logic with optimized delays

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Janez T
2025-10-15 14:59:00 +02:00
parent 829b8605eb
commit 61d0b831ab
3 changed files with 38 additions and 9 deletions
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27
lib/services/ble/ble_connection_manager.dart
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@@ -20,8 +20,19 @@ class BleConnectionManager {
int _reconnectionAttempt = 0;
Timer? _reconnectionTimer;
StreamSubscription<BluetoothConnectionState>? _connectionStateSubscription;
static const int _maxReconnectionAttempts = 5;
static const List<int> _reconnectionDelaysMs = [1000, 2000, 3000, 5000, 10000]; // Exponential backoff
// SAR-optimized reconnection: ~15 minutes total
// Pattern: Fast retries first (for temporary issues), then slower retries (for extended disconnections)
static const int _maxReconnectionAttempts = 30;
static const List<int> _reconnectionDelaysMs = [
2000, // 2s - immediate retry
3000, // 3s - quick retry
5000, // 5s - fast retry
10000, // 10s - moderate retry
15000, // 15s - longer retry
30000, // 30s - extended retry
30000, // 30s - keep trying every 30s after this
]; // Total: ~15 minutes of reconnection attempts
// Callbacks
OnConnectionStateCallback? onConnectionStateChanged;
@@ -234,17 +245,17 @@ class BleConnectionManager {
onReconnectionAttempt?.call(_reconnectionAttempt, _maxReconnectionAttempts);
if (_reconnectionAttempt > _maxReconnectionAttempts) {
print('❌ [BLE] Max reconnection attempts reached. Giving up.');
print('❌ [BLE] Max reconnection attempts reached after ~15 minutes. Giving up.');
_isReconnecting = false;
onError?.call('Connection lost. Max reconnection attempts ($_maxReconnectionAttempts) reached.');
onError?.call('Connection lost. Unable to reconnect after 15 minutes ($_maxReconnectionAttempts attempts).');
return;
}
// Calculate delay with exponential backoff
// Calculate delay with exponential backoff (uses last delay for attempts beyond array length)
final delayIndex = (_reconnectionAttempt - 1).clamp(0, _reconnectionDelaysMs.length - 1);
final delayMs = _reconnectionDelaysMs[delayIndex];
print('🔄 [BLE] Waiting ${delayMs}ms before reconnection attempt $_reconnectionAttempt...');
print('🔄 [BLE] Waiting ${(delayMs / 1000).toStringAsFixed(0)}s before reconnection attempt $_reconnectionAttempt...');
// Wait before attempting reconnection
_reconnectionTimer = Timer(Duration(milliseconds: delayMs), () async {
@@ -272,7 +283,7 @@ class BleConnectionManager {
if (_reconnectionAttempt < _maxReconnectionAttempts) {
_attemptReconnection();
} else {
onError?.call('Connection lost. Unable to reconnect after $_maxReconnectionAttempts attempts.');
onError?.call('Connection lost. Unable to reconnect after 15 minutes ($_maxReconnectionAttempts attempts).');
}
}
} catch (e) {
@@ -283,7 +294,7 @@ class BleConnectionManager {
if (_reconnectionAttempt < _maxReconnectionAttempts) {
_attemptReconnection();
} else {
onError?.call('Connection lost. Unable to reconnect: $e');
onError?.call('Connection lost. Unable to reconnect after 15 minutes: $e');
}
}
});