Moto Low G Bluetooth (BLE) pairing issue

Question

I created a sample application for working with a glucometer. In the sample application, there are options for connecting, connecting and receiving data from the counter, etc. I am using the Google BLE API for this purpose.

Question:

• Nearly 70% of the time, the Moto G never detects the meter via BLE scanning.
• If it detects, and if the sample application tries to pair, pairing is not performed.
• Within a very short time, the sample application successfully combines with the meter. after that, if the application tries to extract data from the meter, the meter becomes unpaired from the Moto G between them.

The same problem was observed when we tried to connect the meter with the standard Bluetooth pairing procedure. We tried 4-5 different glucose counters, but the problem remains the same. The sample application works with other other devices, such as Samsung Galaxy S5, HTC ONE, Samsung Note II and III, LG G2, etc.

Is there any known BLE issue in Moto G? How to solve the above problem?

Setup:

• Moto G - version for Android 4.4.2

• Eclipse Indigo.

I give the log of my sample application for reference.

05-09 11:20:14.353: D/-GlucoseProfileHelper-9(11851): Device Connected. 05-09 11:20:14.354: I/-GlucoseProfileHelperGoogle-9(11851): Pairing Callback onDeviceConnected 05-09 11:20:14.356: I/-TimeOutThread(11851): resetTimer 05-09 11:20:14.436: I/-GoogleGatt-9(11851): IN onDescriptorWrite 05-09 11:20:14.437: I/-TimeOutThread(11851): resetTimer 05-09 11:20:14.439: I/-GoogleGatt-9(11851): characteristic=00002a18-0000-1000-8000-00805f9b34fb, status = 5 05-09 11:20:14.541: V/-BleConnectionManager-9(11851): android.bluetooth.device.action.BOND_STATE_CHANGED 05-09 11:20:14.543: E/-BleConnectionManager-9(11851): BOND STATE CHANGE00:11:22:33:44:55 05-09 11:20:14.555: I/-BtEventReceiver-9(11851): Device : 00:11:22:33:44:55 05-09 11:20:14.555: I/-BtEventReceiver-9(11851): Previous Bond State =(BOND_NONE) 05-09 11:20:14.555: I/-BtEventReceiver-9(11851): current state :(BOND_BONDING) 05-09 11:20:44.081: D/-GoogleTSGattCallback-9(11851): onConnectionStateChange 00:11:22:33:44:55 old status = 0, New state = disconnected 05-09 11:20:44.104: I/-GoogleGatt-9(11851): onConnectionStateChange - state = 0, Status = 0 05-09 11:20:44.104: D/-Profile-9(11851): Device disconnected 05-09 11:20:44.104: I/-GlucoseProfileHelperGoogle-9(11851): Pairing Callback onDeviceDisconnected 05-09 11:20:44.105: I/-GlucoseProfileHelper-9(11851): Pairing Callback - sending Constants.ACTION_BLE_PAIRING_INITIATION_FAILED broadcast 05-09 11:20:44.137: V/-BleConnectionManager-9(11851): android.bluetooth.device.action.BOND_STATE_CHANGED 05-09 11:20:44.138: E/-BleConnectionManager-9(11851): BOND STATE CHANGE00:11:22:33:44:55 05-09 11:20:44.180: I/-BleConnectionManager-9(11851): Pairing Finished 05-09 11:20:44.181: I/-BleConnectionManager-9(11851): Started - moveToNextStateToPairing - BEGIN 05-09 11:20:44.184: I/-BtEventReceiver-9(11851): Device : 00:11:22:33:44:55 05-09 11:20:44.184: I/-BtEventReceiver-9(11851): Previous Bond State =(BOND_BONDING) 05-09 11:20:44.184: I/-BtEventReceiver-9(11851): current state :(BOND_NONE) 05-09 11:20:44.184: V/-BleConnectionManager-9(11851): com.ble.action.ble_pairing_initiation_faied 05-09 11:20:44.688: I/-TimeOutThread(11851): Thread is stopped at counter =56 05-09 11:20:44.724: I/-TimeOutThread(11851): Thread is stopped at counter =4 05-09 11:20:45.181: I/-BleConnectionManager-9(11851): Moving to Scan state 05-09 11:20:45.181: I/-BleScanner-9(11851): startDeviceScan 05-09 11:20:45.182: I/-BleScanner-9(11851): Init Adapter retValue = true 05-09 11:20:45.182: I/-BleConnectionManager-state-9(11851): Device - NULL , State - Scanning 05-09 11:20:45.182: W/-BleConnectionManager-9(11851): Started - moveToNextStateToPairing - END 05-09 11:20:45.184: D/-BleBroadcastReceiver-9(11851): BleBroadcastReceiver 05-09 11:20:45.186: D/-BleBroadcastReceiver-9(11851): startBluetoothDiscovery called. 05-09 11:20:45.201: D/-BleBroadcastReceiver-9(11851): ACTION_BLE_DISCOVERY_STARTEDo.?@420a11c8 05-09 11:20:57.213: D/-BleBroadcastReceiver-9(11851): ACTION_BLE_DISCOVERY_FINISHED. 05-09 11:20:57.213: D/-BleBroadcastReceiver-9(11851): startBluetoothDiscovery called. 05-09 11:20:57.220: I/-GoogleBleAdapter-9(11851): Timer canceled 05-09 11:20:57.223: D/-BleBroadcastReceiver-9(11851): ACTION_BLE_DISCOVERY_STARTEDo.?@420a11c8 05-09 11:20:57.223: I/-BleBroadcastReceiver-ScanMonitorThread-9(11851): Monitor Thread Interrupted 05-09 11:21:02.355: I/-BleBroadcastReceiver-9(11851): device Found -> address ->00:11:22:33:44:55, Bonded state : Not bonded 05-09 11:21:09.225: I/-GoogleBleAdapter-9(11851): Timer canceled 05-09 11:21:09.226: D/-BleBroadcastReceiver-9(11851): ACTION_BLE_DISCOVERY_FINISHED. 05-09 11:21:09.226: D/-BleBroadcastReceiver-9(11851): startBluetoothDiscovery called. 05-09 11:21:09.230: I/-BleBroadcastReceiver-ScanMonitorThread-9(11851): Monitor Thread Interrupted 05-09 11:21:09.231: D/-BleBroadcastReceiver-9(11851): ACTION_BLE_DISCOVERY_STARTEDo.?@420a11c8 05-09 11:21:09.258: I/-BleBroadcastReceiver-9(11851): device Found -> address ->00:11:22:33:44:55, Bonded state : Not bonded 05-09 11:21:21.252: D/-BleBroadcastReceiver-9(11851): ACTION_BLE_DISCOVERY_FINISHED. 05-09 11:21:21.252: D/-BleBroadcastReceiver-9(11851): startBluetoothDiscovery called. 05-09 11:21:21.258: I/-GoogleBleAdapter-9(11851): Timer canceled 05-09 11:21:21.260: D/-BleBroadcastReceiver-9(11851): ACTION_BLE_DISCOVERY_STARTEDo.?@420a11c8 05-09 11:21:21.261: I/-BleBroadcastReceiver-ScanMonitorThread-9(11851): Monitor Thread Interrupted 05-09 11:21:21.296: I/-BleBroadcastReceiver-9(11851): device Found -> address ->00:11:22:33:44:55, Bonded state : Not bonded 05-09 11:21:33.269: D/-BleBroadcastReceiver-9(11851): ACTION_BLE_DISCOVERY_FINISHED.