code: def __send_command(self, command, command_string=b'', response_size=8):
          
          if command not in [const.CMD_CONNECT, const.CMD_AUTH] and not self.is_connect:
              raise ZKErrorConnection("instance are not connected.")
  
          buf = self.__create_header(command, command_string, self.__session_id, self.__reply_id)
          try:
              if self.tcp:
                  top = self.__create_tcp_top(buf)
                  self.__sock.send(top)
                  self.__tcp_data_recv = self.__sock.recv(response_size + 8)
                  self.__tcp_length = self.__test_tcp_top(self.__tcp_data_recv)
                  if self.__tcp_length == 0:
                      raise ZKNetworkError("TCP packet invalid")
                  self.__header = unpack('<4H', self.__tcp_data_recv[8:16])
                  self.__data_recv = self.__tcp_data_recv[8:]
              else:
                  self.__sock.sendto(buf, self.__address)
                  self.__data_recv = self.__sock.recv(response_size)
                  self.__header = unpack('<4H', self.__data_recv[:8])
          except Exception as e:
              raise ZKNetworkError(str(e))
  
          self.__response = self.__header[0]
          self.__reply_id = self.__header[3]
          self.__data = self.__data_recv[8:]
          if self.__response in [const.CMD_ACK_OK, const.CMD_PREPARE_DATA, const.CMD_DATA]:
              return {
                  'status': True,
                  'code': self.__response
              }
          return {
              'status': False,
              'code': self.__response
          }
docs: send command to the terminal