VitBest M-0404SE User Manual
HDMI Matrix Serial communication protocol
1 Serial communication protocol format:
Baud Rate: 9600
Data bits: 8
Parity: None
Stop bits: 1
Command head
(2 byte)
Command
index
(1 byte)
Command length
(1 byte)
Command body
(CMD_LENGTH
bytes)
Check-sum
(1 byte)
Command tail
(2 byte)
CMD_HEAD
CMD_INDEX
CMD_LENGHT
CMD_BODY
CMD_CHECKSUM
CMD_TAIL
{{
}}
0x7b 0x7b
0x7d 0x7d
Note: Check-sum is the low 8bits of the sum of CMD_HEAD,CMD_INDEX,CMD_LENGHT,CMD_BODY and CMD_TAI
The length of all the command is CMD7;
Example: 7B 7B 01 02 01 01 F5 7D 7D
7b 7b: Command head
01: Command index
（
Change routing command
）
02: Command length: the length of the command body
