code: def disconnect(self):
          
          cmd_response = self.__send_command(const.CMD_EXIT)
          if cmd_response.get('status'):
              self.is_connect = False
              if self.__sock:
                  self.__sock.close()
              return True
          else:
              raise ZKErrorResponse("can't disconnect")
docs: diconnect from the connected device
  
          :return: bool