Remote Control Pass-Through Mode - ViewSonic CDM4300R User Manual

10.3.3. Remote Control Pass-through mode

When the PC sets the TV/DS to Remote Control Pass through mode, the TV/DS will send a 7-byte packet
(followed by "CR") in response to RCU button activation. Note, that in this mode the RCU shall have no
effect on the TV/DS function. For example: "Volume+" will not change the volume in the LCD but only sends
"Volume+" code to PC over the RS232 port.
IR Pass Through-Function format
Reply: (Command Type="p")
Name Length
Byte Count 1 Byte
Bytes order 1
Example1: Remote Control pass-through when "VOL+" key is pressed for TV-05 Send (Hex Format)
Name Length
Hex 0x36
Command
ID
Type
2 Byte 1 Byte
2~3 4
Command
ID
Type
0x30
0x70
0x35
48
RCU Code1 RCU Code2
(MSB) (LSB)
1 Byte 1 Byte
5 6
Command Value1
0x31 0x30
CR
1 Byte
7
CR
0x0D