Android：读取特性时 GATT 137 异常

Question

I'm connecting bluetotooth device. I'm getting GATT 137 exception when I read characteristic of bluetooth device. Why I can't read characteristic? Code snippet:

if (!mBluetoothGatt.readCharacteristic(mCharacteristic)) {
     Log.e(TAG, "read characteristic task is success")
    }else{
     Log.e(TAG, "read characteristic task is fail")
    }
              

Answer 1

code 137 is AUTHORIZATION_FAILED. So you probably need to bond with your device first.