Android BLE GATT_ERROR(133) on connecting to device

Question

I am trying to connect to a BLE device using the MAC address.

BluetoothDevice device = bluetoothAdapter.getRemoteDevice(rememberedDeviceAddress)
bluetoothDevice.         


        

Answer 1

Certain devices require Bluetooth LE interactions to be run on the UI thread. So I would recommend trying something like this:

// Create handler for main thread where mContext is application context
mHandler = new Handler(mContext.getMainLooper());
...
// Connect to BLE device from mHandler
mHandler.post(new Runnable() {
@Override
public void run() {
    mBTGatt = mBTDevice.connectGatt(mContext, false, mGattCallback);
}
});

Of course you could use Activity.runOnUiThread as well. Source: https://stackoverflow.com/a/23478737