code: def _on_connected(self, device):
          
          self._logger.debug("Device connected event: {}".format(device))
  
          self.connected = True
          self._connection_handle = device['connection_handle']
          self.device.connected = True
          self._audit('ClientConnected')
docs: Callback function called when a connected event has been received.
          It is executed in the baBLE working thread: should not be blocking.
  
          Args:
              device (dict): Information about the newly connected device