Unable to readCharacteristic after writeCharacteristic about rxandroidble

[Unai-HP]

Hi. Thanks for replying so fast!
You are right, I didn't provide enough info, so I've rechecked to paste the logs here and found some (more descriptive) errors. I don't know how I missed them.

D  setCharacteristicNotification() - uuid: f8083535-849e-531c-c594-30f1f86a4ea5 enable: true
D  QUEUED   CharacteristicWriteOperation(125660900)
D  STARTED  CharacteristicWriteOperation(125660900)
I  RUNNING  CharacteristicWriteOperation{MAC='XX:XX:XX:XX:XX:XX', characteristic=[uuid='...', hexValue=[...]]}
I  MAC='XX:XX:XX:XX:XX:XX'    onCharacteristicWrite(), status=0, value=[uuid='...']

W  Characteristic ... supports properties: [ WRITE INDICATE ] (40) does not have any property matching [ READ ] (2) <--- The error

D  QUEUED   CharacteristicReadOperation(91684627)
D  FINISHED CharacteristicWriteOperation(125660900) in 442 ms
D  STARTED  CharacteristicReadOperation(91684627)
I  RUNNING  CharacteristicReadOperation{MAC='XX:XX:XX:XX:XX:XX', characteristic=[uuid='...']}

D  Could not read after AuthRequestTX: com.polidea.rxandroidble2.exceptions.BleGattCannotStartException: 
GATT exception from MAC address 'XX:XX:XX:XX:XX:XX', with type BleGattOperation{description='CHARACTERISTIC_READ'}

D  FINISHED CharacteristicReadOperation(91684627) in 37 ms
I  MAC='XX:XX:XX:XX:XX:XX'  onConnectionStateChange(), status=0, value=0
D  Connection operations queue to be terminated (MAC='XX:XX:XX:XX:XX:XX')
   com.polidea.rxandroidble2.exceptions.BleDisconnectedException: Disconnected from MAC='XX:XX:XX:XX:XX:XX' with status 0 (GATT_SUCCESS)
   	at com.polidea.rxandroidble2.internal.connection.RxBleGattCallback$2.onConnectionStateChange(RxBleGattCallback.java:81)
   	at android.bluetooth.BluetoothGatt$1$4.run(BluetoothGatt.java:307)
   	at android.bluetooth.BluetoothGatt.runOrQueueCallback(BluetoothGatt.java:874)
   	at android.bluetooth.BluetoothGatt.-$$Nest$mrunOrQueueCallback(Unknown Source:0)
   	at android.bluetooth.BluetoothGatt$1.onClientConnectionState(BluetoothGatt.java:302)
   	at android.bluetooth.IBluetoothGattCallback$Stub.onTransact(IBluetoothGattCallback.java:128)
   	at android.os.Binder.execTransactInternal(Binder.java:1285)
   	at android.os.Binder.execTransact(Binder.java:1244)
D  Connection Disconnected/Failed: com.polidea.rxandroidble2.exceptions.BleDisconnectedException: Disconnected from MAC='XX:XX:XX:XX:XX:XX' with status 0 (GATT_SUCCESS)
D  QUEUED   DisconnectOperation(4749679)
D  setCharacteristicNotification() - uuid: f8083535-849e-531c-c594-30f1f86a4ea5 enable: false
D  STARTED  DisconnectOperation(4749679)
I  RUNNING  DisconnectOperation{MAC='XX:XX:XX:XX:XX:XX'}
D  onConnectionStateChange newState: RxBleConnectionState{DISCONNECTING}

Looks like the "read" operation doesn't exist, I guess I'm not doing the auth correctly. I've seen some post of this already, so I'll check those to see if I can get a fix. Again, thanks for your get.

[dariuszseweryn]

Hello, thanks for using the library!

Unfortunately you didn't provide much context in the logs so I can only guess that the connection is not being kept alive. Connection should be kept alive as long as the subscribers to RxBleDevice#establishConnection are subscribed.

Is it the case?

[dariuszseweryn]

@Unai-HP Did you happen to fix the issue?

[Unai-HP]

Yes, I forgot closing the issue, sorry.

[dariuszseweryn]

I am glad that you were able to find a fix.

If you can disclose it — please post the root cause and solution for the problem — other people who would come here later could benefit from that. Thanks in advance!