Android Bluetooth LE: Not discovering services after connection

Question

I'm trying to use Android's Bluetooth Low Energy to communicate with a BLE device. The first time I connect, everything works fine (connecting to GATT server works, all services and characteristics are discovered, etc.) But, if I disconnect and try to re-connect, it will connect to the GATT server, but will not be able to discover the services. I have to kill the app and restart it, and sometimes even that doesn't work.

This is the code I'm using to disconnect from the device:

public void close(View view) {
    if (mBluetoothGatt == null) {
        return;
    }
    mBluetoothGatt.close();
    mBluetoothGatt = null;
}

Is there anything else that I need to do when disconnecting? There seems to be some resource that is still connected that prevents discovery of services when I try and reconnect.

Prashan Dharmasena Prashan Dharmasena · Accepted Answer · 2014-06-04T18:04:51

I seem to have found the solution: you need to call both BluetoothGatt.disconnect() AND BluetoothGatt.close().

Android Bluetooth LE: Not discovering services after connection

1 Answers