大写字母表

  if(cmd_packet.cmd ==APP_CMD && cmd_packet.subcmd == APP_SUMCMD && cmd_packet.options[0] == 0x01 &&  cmd_packet.options[1] == 1 && cmd_packet.options[2] ==0x06 &&  cmd_packet.options[3] == 50)    //C

0x04 A
0x05 B