Reputation: 589
I am working on Android BLE using RxAndroidBle library. The BLE device has a timeout of 5 min if there is no interaction. i.e. The device will disconnect automatically if there is no read/write operations for 5 minutes. I am getting BleGattException when timeout disconnection happens.
W/System.err: BleGattException{macAddress=24:71:89:FE:A0:88, status=19 (0x13 -> https://android.googlesource.com/platform/external/bluetooth/bluedroid/+/android-5.1.0_r1/stack/include/gatt_api.h), bleGattOperationType=BleGattOperation{description='CONNECTION_STATE'}}
W/System.err: at com.polidea.rxandroidble.internal.connection.RxBleGattCallback.propagateStatusErrorIfGattErrorOccurred(RxBleGattCallback.java:233)
W/System.err: at com.polidea.rxandroidble.internal.connection.RxBleGattCallback.access$200(RxBleGattCallback.java:35)
W/System.err: at com.polidea.rxandroidble.internal.connection.RxBleGattCallback$3.onConnectionStateChange(RxBleGattCallback.java:86)
W/System.err: at android.bluetooth.BluetoothGatt$1.onClientConnectionState(BluetoothGatt.java:228)
W/System.err: at android.bluetooth.IBluetoothGattCallback$Stub.onTransact(IBluetoothGattCallback.java:70)
W/System.err: at android.os.Binder.execTransact(Binder.java:453)
W/BluetoothGatt: Unhandled exception in callback
rx.exceptions.OnErrorFailedException: Error occurred when trying to propagate error to Observer.onError
at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:194)
at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:115)
at rx.observers.Subscribers$5.onError(Subscribers.java:230)
at rx.observers.Subscribers$5.onError(Subscribers.java:230)
at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onError(OnSubscribeDoOnEach.java:87)
at rx.observers.Subscribers$5.onError(Subscribers.java:230)
at rx.observers.Subscribers$5.onError(Subscribers.java:230)
at rx.observers.Subscribers$5.onError(Subscribers.java:230)
at rx.internal.operators.OperatorMerge$MergeSubscriber.reportError(OperatorMerge.java:266)
at rx.internal.operators.OperatorMerge$MergeSubscriber.checkTerminate(OperatorMerge.java:818)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitLoop(OperatorMerge.java:579)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emit(OperatorMerge.java:568)
at rx.internal.operators.OperatorMerge$InnerSubscriber.onError(OperatorMerge.java:852)
at rx.internal.operators.OperatorMerge$MergeSubscriber.reportError(OperatorMerge.java:266)
at rx.internal.operators.OperatorMerge$MergeSubscriber.checkTerminate(OperatorMerge.java:818)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitLoop(OperatorMerge.java:579)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emit(OperatorMerge.java:568)
at rx.internal.operators.OperatorMerge$InnerSubscriber.onError(OperatorMerge.java:852)
at rx.internal.operators.OperatorMerge$MergeSubscriber.reportError(OperatorMerge.java:266)
at rx.internal.operators.OperatorMerge$MergeSubscriber.checkTerminate(OperatorMerge.java:818)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emitLoop(OperatorMerge.java:579)
at rx.internal.operators.OperatorMerge$MergeSubscriber.emit(OperatorMerge.java:568)
at rx.internal.operators.OperatorMerge$InnerSubscriber.onError(OperatorMerge.java:852)
at rx.internal.operators.NotificationLite.accept(NotificationLite.java:132)
at rx.subjects.SubjectSubscriptionManager$SubjectObserver.emitNext(SubjectSubscriptionManager.java:253)
at rx.subjects.BehaviorSubject.onError(BehaviorSubject.java:141)
at com.polidea.rxandroidble.internal.connection.RxBleGattCallback.propagateStatusError(RxBleGattCallback.java:241)
at com.polidea.rxandroidble.internal.connection.RxBleGattCallback.propagateStatusErrorIfGattErrorOccurred(RxBleGattCallback.java:233)
at com.polidea.rxandroidble.internal.connection.RxBleGattCallback.access$200(RxBleGattCallback.java:35)
at com.polidea.rxandroidble.internal.connection.RxBleGattCallback$3.onConnectionStateChange(RxBleGattCallback.java:86)
at android.bluetooth.BluetoothGatt$1.onClientConnectionState(BluetoothGatt.java:228)
at android.bluetooth.IBluetoothGattCallback$Stub.onTransact(IBluetoothGattCallback.java:70)
at android.os.Binder.execTransact(Binder.java:453)
Caused by: rx.exceptions.OnErrorFailedException: Error occurred when trying to propagate error to Observer.onError
at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:187)
at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:115)
at rx.exceptions.Exceptions.throwOrReport(Exceptions.java:216)
at rx.observers.SafeSubscriber.onNext(SafeSubscriber.java:139)
at rx.internal.operators.OperatorDistinctUntilChanged$1.onNext(OperatorDistinctUntilChanged.java:96)
at rx.internal.operators.NotificationLite.accept(NotificationLite.java:135)
at rx.subjects.SubjectSubscriptionManager$SubjectObserver.emitNext(SubjectSubscriptionManager.java:253)
at rx.subjects.BehaviorSubject.onNext(BehaviorSubject.java:160)
at com.polidea.rxandroidble.internal.RxBleDeviceImpl$1$1.call(RxBleDeviceImpl.java:77)
at rx.subscriptions.BooleanSubscription.unsubscribe(BooleanSubscription.java:71)
at rx.internal.util.SubscriptionList.unsubscribeFromAll(SubscriptionList.java:136)
at rx.internal.util.SubscriptionList.unsubscribe(SubscriptionList.java:125)
Once the device disconnects due to timeout, When I scan again I could find the device in the near by available devices as expected. But when I try to connect to the same device, it throws an exception telling device is already connected
W/System.err: BleAlreadyConnectedException{macAddress=24:71:89:FE:99:E3}
W/System.err: at com.polidea.rxandroidble.internal.RxBleDeviceImpl.lambda$establishConnection$3(RxBleDeviceImpl.java:54)
W/System.err: at com.polidea.rxandroidble.internal.RxBleDeviceImpl$$Lambda$1.call(Unknown Source)
W/System.err: at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:46)
W/System.err: at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)
W/System.err: at rx.Observable.subscribe(Observable.java:10236)
W/System.err: at rx.Observable.subscribe(Observable.java:10203)
W/System.err: at rx.Observable.subscribe(Observable.java:10043)
But I am able to connect to the device if I turn off and On bluetooth in my mobile or if I kill the app and restart.
And re-connecting is working when I manually disconnect the device and connect again. The issue is only when time-out disconnection happens.
Can any one tell me why is this happening?
Upvotes: 0
Views: 1917
Reputation: 3222
Judging from the error and the implementation of the .establishConnection()
function you do not unsubscribe from the previous Observable
that was returned.
@Override
public Observable<RxBleConnection> establishConnection(final boolean autoConnect) {
return Observable.defer(new Func0<Observable<RxBleConnection>>() {
@Override
public Observable<RxBleConnection> call() {
if (isConnected.compareAndSet(false, true)) {
return connector.prepareConnection(autoConnect)
.doOnSubscribe(new Action0() {
@Override
public void call() {
connectionStateSubject.onNext(CONNECTING);
}
})
.doOnNext(new Action1<RxBleConnection>() {
@Override
public void call(RxBleConnection rxBleConnection) {
connectionStateSubject.onNext(CONNECTED);
}
})
.doOnUnsubscribe(new Action0() {
@Override
public void call() {
connectionStateSubject.onNext(DISCONNECTED);
isConnected.set(false);
}
});
} else {
return Observable.error(new BleAlreadyConnectedException(bluetoothDevice.getAddress()));
}
}
});
}
Once you unsubscribe from the previous one you should be able to establish a new connection.
Upvotes: 1