Connection with Nordic UART device is not working on Android 7.1 about android-ble-library HOT 5 CLOSED

I have also faced the same issue

from android-ble-library.

Hi, sorry for the super long delay. Do you still face this issue? Did you try v2 of the BLE library?

from android-ble-library.

Hi,

In my case, there was some connection issue in Android 8.0, LG phone with 133 error. So I needed following change and it seemed to be fine for my case.

in BLE manager,

mBluetoothGatt = device.connectGatt(mContext, false, mGattCallback = getGattCallback());

was changed to

mBluetoothGatt = device.connectGatt(mContext, false, mGattCallback = getGattCallback(), 2);

especially for newer OS like Marshmallow or higher.

All in all, it's well designed library and I really appreciate your excellent work.

Thanks.

from android-ble-library.

The new version of the library uses TRANSPORT_LE for Marshmallow or newer: https://github.com/NordicSemiconductor/Android-BLE-Library/blob/master/ble/src/main/java/no/nordicsemi/android/ble/BleManager.java#L805. Actually, the connectGatt with transport parameter was available before (since KitKat?), but only using reflections.

from android-ble-library.

Hi,

Thank you very much for your work again. Anyway I have tried the library 2.0, but there was some connection issue again for Android 8.0, LG phone. Maybe it might have something to do with application which uses the library though. So I have gone back to 1.2 version with the above change I have commented in the above. So no connection problem in my case after that. So I would like to recommend you to test the library 2.0 with Android 8.0 (Oreo).

Thanks again.

from android-ble-library.