User`s manual

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13.4 Auto Brightness Sensor Write
Broadcast light sensor data from Host(PC or Primary Monitor) to Secondary Monitors.
1) Write Parameters from PC to Monitors.
Header Message Check code Delimiter
SOH-'0'-'*'-'0'-'A'-'1'-'2' STX-'C'-'2'-'2'-'4'–[FVAL_HH]
-[FVAL_HL]- [FVAL_LH] -[FVAL_LL] -
[BVAL_HH] -[BVAL_HL] -[BVAL_LH]
-[BVAL_LL] -[APL_HH] -[APL_HL]
-[APL_LH] -[APL_LL] –ETX
BCC CR
Header
SOH (01h): Start Of Header
'0' (30h): Reserved
'*' (2Ah): Monitor ID
(Use ‘*’ as “ALL” for Broadcasting of parameter)
'0' (30h): Message sender is the controller
'A' (41h): Message type is "Command"
'1'-'2'(31h, 32h): Message length.
Message
STX (02h): Start of Message
'C' -'2' -'2' -'4' (43h,32h,32h,34h): Auto Brightness Sensor Write command
FVAL_HH:Front Sensor Detected Data(High High byte)
FVAL_HL:Front Sensor Detected Data(High Low byte)
FVAL_LH:Front Sensor Detected Data(Low High byte)
FVAL_LL:Front Sensor Detected Data(Low Low byte)
BVAL_HH:Back Sensor Detected Data(High High byte)
BVAL_HL:Back Sensor Detected Data(High Low byte)
BVAL_LH:Back Sensor Detected Data(Low High byte)
BVAL_LL:Back Sensor Detected Data(Low Low byte)
APL_HH:APL data(High High byte)
APL_HL:APL data(High Low byte)
APL_LH:APL data(LowHigh byte)
APL_LL:APL data(Low Low byte)
ETX (03h): End of Message
Check code
BCC: Block Check Code
Refer to the section 4.5 “Check code” for a BCC calculation.
Delimiter
CR (0Dh): End of packet
2) Reply from Monitor to Host.
Basically, No need reply because it is broadcasting request.
[only for reference if the write command is done with certain destination ID]
Note: If AutoBrightness is not “Remote” then return Null Message.
Header Message Check code Delimiter
SOH-'0'-'0'-'A'-'B'-'1' -'4' STX-'C'-'3'-'2'-'4'-[RES]-[RES]- [FVAL_HH]-
[FVAL_HL]- [FVAL_LH]-[FVAL_LL]-
[BVAL_HH]-[BVAL_HL]-
[BVAL_LH]-[BVAL_LL]-[APL_HH]-[APL_HL]
-[APL_LH]-[APL_LL]-ETX
BCC CR
Header
SOH (01h): Start Of Header
'0' (30h): Reserved
'0' (30h): Message receiver is the controller
'A' (41h): Monitor ID
'B' (42h): Message type is "Command reply "
'1' -'4' (31h, 34h): Message length.
Message
STX (02h): Start of Message
'C'-'3'-'2' -'4' (41h, 33h, 32h,34h): Auto Brightness Sensor Write reply Command
RES: Result code('0'(30h)-'0'(30h):Normal,
、 '0'(30h)-'1'(31h):Abnormal)