Hello,
Setup: Android 4.4.2 (LG G2), nRF51822 peripherial.
I noticed that once in a while when trying to connect to my nRF51 based device it won't connect and what is worse the device gets removed from the list of bonded devices on the android phone. So I wrote an android test app that repeats the following steps (pseudo code):
BluetoothDevice.connectGatt()
wait for onConnectionSateChanged..
if BluetoothProfile.STATE_CONNECTED call BluetoothGatt.discoverServices()
wait for onServicesDiscovered()
if BluetoothGatt.GATT_SUCCESS waits for 500ms
call BluetoothGatt.disconnect()
wait for onConnectionSateChanged
if BluetoothProfile.STATE_DISCONNECTED call BluetoothGatt.close()
wait for 500ms
Usually after repeating this 10-100 times I end up getting a disconnect right after service discovery completed. In addition the device is removed from the list of bonded devices (a ACTION_BOND_STATE_CHANGED broadcast is issued by the system).
This is the corresponding log. The disconnect happens at 33.313
....
06-05 09:23:33.193 2519-2546/? D/BtGatt.btif? btif_gattc_get_descriptor
06-05 09:23:33.193 2519-2546/? D/BtGatt.btif? btgattc_handle_event: Event 1009
06-05 09:23:33.193 2519-2546/? D/BtGatt.GattService? onGetDescriptor() - address=DA:88:2C:42:63:10, status=133, descUuid=00002902-0000-1000-8000-00805f9b34fb
06-05 09:23:33.193 27932-27945/com.me.test D/BluetoothGatt? onSearchComplete() = Device=DA:88:2C:42:63:10 Status=0
06-05 09:23:33.313 2519-2744/? E/bt-btm? btm_sec_disconnected - Clearing Pending flag
06-05 09:23:33.313 2519-2744/? W/bt-btif? bta_dm_act no entry for connected service cbs
06-05 09:23:33.313 2519-2546/? D/BtGatt.btif? btif_gattc_upstreams_evt: Event 5
06-05 09:23:33.313 2519-2546/? D/BtGatt.GattService? onDisconnected() - clientIf=5, connId=261, address=DA:88:2C:42:63:10
06-05 09:23:33.313 27932-28117/com.me.test D/BluetoothGatt? onClientConnectionState() - status=0 clientIf=5 device=DA:88:2C:42:63:10
....
Any idea what the problem might be or hints how to debug this? I'm not sure if the problem is on the nRF51 device side or Android side. The nRF51 Software doesn't seem to do anything unusual (doesn't hang, no reset etc.). Capturing the event using the sniffer also doesn't reveal anything to me:
Thanks!
