code: def probe_services(self, handle, conn_id, callback):
          
  
          self._command_task.async_command(['_probe_services', handle], callback,
                                           {'connection_id': conn_id, 'handle': handle})
docs: Given a connected device, probe for its GATT services and characteristics
  
          Args:
              handle (int): a handle to the connection on the BLED112 dongle
              conn_id (int): a unique identifier for this connection on the DeviceManager
                  that owns this adapter.
              callback (callable): Callback to be called when this procedure finishes