38Connect RS-232 port to the PC or controlling device. Enable RS-232 serial portconnection and complete the following configuration.The following table lists the button controlling code and return code.E Serial Port ControlPort: COM1 (Set according to PC or controlling device’s port number)Bit rate 19200 Odd/even check NoneData bits 8 Stop bit 1Function Controlling codes Return codesPower on 7F 08 99 A2 B3 C4 02 FF 01 00CF7F 09 99 A2 B3 C4 02 FF 01 0001 CF 00Power off 7F 08 99 A2 B3 C4 02 FF 01 01CF7F 09 99 A2 B3 C4 02 FF 01 0101 CFMute 7F 08 99 A2 B3 C4 02 FF 01 02CF7F 09 99 A2 B3 C4 02 FF 01 0201 CFSignal source 7F 08 99 A2 B3 C4 02 FF 01 06CF7F 09 99 A2 B3 C4 02 FF 01 0601 CFStart thewhiteboard7F 08 99 A2 B3 C4 02 FF 01 07CF7F 09 99 A2 B3 C4 02 FF 01 0701 CFDisplay status 7F 08 99 A2 B3 C4 02 FF 01 09CF7F 09 99 A2 B3 C4 02 FF 01 0901 CFHDMI Front 7F 08 99 A2 B3 C4 02 FF 01 0ACF7F 09 99 A2 B3 C4 02 FF 01 0A01 CFHDMI Rear 7F 08 99 A2 B3 C4 02 FF 01 0BCF7F 09 99 A2 B3 C4 02 FF 01 0B01 CFInternal PC 7F 08 99 A2 B3 C4 02 FF 01 38CF7F 09 99 A2 B3 C4 02 FF 01 3801 CFVGA 7F 08 99 A2 B3 C4 02 FF 01 0DCF7F 09 99 A2 B3 C4 02 FF 01 0D01 CFPage Up 7F 08 99 A2 B3 C4 02 FF 01 13CF7F 09 99 A2 B3 C4 02 FF 01 1301 CFPage Down 7F 08 99 A2 B3 C4 02 FF 01 14CF7F 09 99 A2 B3 C4 02 FF 01 1401 CFVOL - 7F 08 99 A2 B3 C4 02 FF 01 17CF7F 09 99 A2 B3 C4 02 FF 01 1701 CF