812H HDMI switch RS232 control code
| Serial port settings | Baud rate 9600bps, 8 data, 1 stop, check digit None |
| Command | Format (3 bytes hexadecimal) |
| Enter1 | 0x30 0x30 0x30 |
| Enter2 | 0x30 0x30 0x31 |
| Enter3 | 0x30 0x30 0x32 |
| Enter4 | 0x30 0x30 0x33 |
| Enter5 | 0x30 0x30 0x34 |
| Enter6 | 0x30 0x30 0x35 |
| Enter7 | 0x30 0x30 0x36 |
| Enter8 | 0x30 0x30 0x37 |
Note: Remove all the 0x in front of the code when testing.