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Fixing the missing devices when discovering for the first time. Fixes #151 #157

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Fixing the missing devices when discovering for the first time. Fixes #151 #157

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17 changes: 12 additions & 5 deletions lib/FlutterBluetoothSerial.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -217,13 +217,20 @@ class FlutterBluetoothSerial {
},
);

await _methodChannel.invokeMethod('startDiscovery');
// If we are already discovering we cancel the discovery
// This is useful to prevent subscription to be done before we call startDiscovery
if((await isDiscovering) == true) {
await cancelDiscovery();
}

// We subscribe before calling startDiscovery to prevent loosing results
subscription = _discoveryChannel.receiveBroadcastStream().listen(
controller.add,
onError: controller.addError,
onDone: controller.close,
);
controller.add,
onError: controller.addError,
onDone: controller.close,
);

await _methodChannel.invokeMethod('startDiscovery');

yield* controller.stream
.map((map) => BluetoothDiscoveryResult.fromMap(map));
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