We are making a IOT device with a BLE interface which uses the HM-11 (http://www.seeedstudio.com/wiki/Bluetooth_V4.0_HM-11_BLE_Module) breakout board hosting the chip CC2541 (http://www.ti.com/product/CC2541).
The authentication method is set to 2:Auth with PIN
Clip from the data sheet showing available authentication modes is as follows:
63. Query/Set Module Bond Mode
Send Receive Parameter
AT+TYPE? OK+Get:[para1] None
AT+TYPE[para1] OK+Set:[para1] Para1: 0~2
0:Not need PIN Code
1:Auth not need PIN
2:Auth with PIN
3:Auth and bond
Default: 0
For devices less than Android version 5.0 it works out just fine.
However
For devices with Android version 5.0 the pairing dialog appears without diaplyed-pin or pin-entering-field and when the
pairbutton is clicked it fails to pair - complaining withCouldn't pair with MyApp because of an incorrect PIN or passkey.
For devices with Android version 5.1 it does not even show the pairing dialog and fails to pair.
Notes: Tried restarting devices, forgetting devices, clearing bonding information from device.
Looking for guidance, advice, help, comments, code.
