code: def __ack_ok(self):
          
          buf = self.__create_header(const.CMD_ACK_OK, b'', self.__session_id, const.USHRT_MAX - 1)
          try:
              if self.tcp:
                  top = self.__create_tcp_top(buf)
                  self.__sock.send(top)
              else:
                  self.__sock.sendto(buf, self.__address)
          except Exception as e:
              raise ZKNetworkError(str(e))
docs: event ack ok