BenQ ST4301K User manual

1
ST5501K_ST4301K RS232/LAN Control Protocol
Installation Guide

2
Table of Contents
Introduction...........................................................................................................................3
Wire arrangement.........................................................................................................................................................3
RS232 pin assignment...................................................................................................................................................3
Communicationsetting...................................................................................................................................... 4
Command message reference............................................................................................................................ 4
Connections and communication settings..............................................................................4
RS232 serial port connection .....................................................................................................................................4
RS232 via LAN...............................................................................................................................................................5
RS232 via HDBaseT......................................................................................................................................................5
Protocol Command Description .............................................................................................5
Set-function listing.........................................................................................................................................................6
Set-function description........................................................................................................................................................ 6
Set-function format ........................................................................................................................................... 6
Set-function table .............................................................................................................................................. 8
Get-function listing......................................................................................................................................................17
Get-function description ....................................................................................................................................................17
Get-function format ........................................................................................................................................ 18
PC Get-function command to LCD Monitor .................................................................................................21
Date: 2019/03/15

3
Introduction
This document describes the hardware interface spec and software protocols of RS232 interface
communication between Commercial Display and PC or other control unit with RS232 protocol.
This set protocol allow users to assign the ID in the command to control the specify ID monitor.
The set protocol contains two sections command: Set-Function and Get-Function
In this document, "PC" represents all the control units that can send or receive the RS232 protocol command.
Wire arrangement
Wire Arrangement
P1
Color
P2
1
Black
1
2
Brown
3
3
Red
2
4
Orange
4
5
Yellow
5
6
Green
6
7
Blue
7
8
Purple
8
9
Gray
9
Case
Drain wire
Case
RS232 pin assignment
Pin
Description
Pin
Description
1
NC
2
RXD
3
TXD
4
NC
5
GND
6
NC
7
RTS
8
CTS
9
NC
Use of crossover (null modem) cable requires use with PC.

4
Communication setting
Baud rate select: 9600bps (fixed)/ Data bits: 8 bits (fixed)
Parity: None (fixed)/ Stop Bits: 1(fixed)
Command message reference
PC sends to Monitor command packet followed by "CR". Every time PC sends control command to the
Monitor, the Monitor shall response as follows:
1. If the message is received correctly, it will send "+" (02Bh) followed by "CR" (00Dh).
2. If the message is received incorrectly, it will send "-" (02Dh) followed by "CR" (00Dh).
Connections and communication settings
Choose one of the connections and set up properly before RS232 control.
RS232 serial port connection
Communication cable (straight)

5
RS232 via LAN
Find the Wired LAN IP address of the connected display from the OSD menu and make sure the display and the computer
are within the same network.
IP Protocol Port: 4660
RS232 via HDBaseT
Protocol Command Description
Item
Description
Length
Total Bytes of Message excluding "CR"
Display ID
Identification for each of display
Command Type
Identify command type, "s"
(0x73h): Set Command
"g" (0x67h): Get Command
"r" (0x72h): Reply Command
"+" (0x2Bh): Valid command Reply
"-" (0x2Dh): Invalid command Reply
Command
Function command code: One byte ASCII code
Value [1~3]
Three bytes ASCII that defines the value
D-Sub 9 pin
PC or laptop
LAN cable
RJ45 port on a display
HDBaseT compatible device
D-Sub 9 pin
RJ45
RJ45 port on a display
LAN cable
PC or laptop

6
CR
0x0D
Set-function listing
The PC can control the LCD Monitor for specific actions. The Set-Function command allows you to
control the LCD monitor behavior in a remote sit through the RS232 port. The
Set-Function packet format consists of 11 bytes.
Set-function description
Item
Description
Length
Total Bytes of Message excluding "CR"
Display ID
Identification for each of display
Display ID is “01”for LAN control
Command Type
Identify command type, "s"
(0x73h): Set Command
Command
Function command code: One byte ASCII code
Value [1~3]
Three bytes ASCII that defines the value
CR
0x0D
Set-function format
Send: (Command Type="s")
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
CR
Byte count
1 Byte
2 Byte
1 Byte
1 Byte
1 Byte
1 Byte
1 Byte
1 Byte
Bytes
order
1
2~3
4
5
6
7
8
9
Reply: (Command Type="+" or "-")
Name
Length
ID
Command
type
CR
Bytecount
1 Byte
2 Byte
1 Byte
1 Byte
Bytes
order
1
2~3
4
5
Example 1: Set Brightness as 76 for Display-02 and this command is valid.
Send (Hex Format)
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
CR

7
Hex
0x38
0x30
0x32
0x73
0x24
0x30
0x37
0x36
0x0D
Reply (Hex Format)
Name
Length
ID
Command
type
CR
Hex
0x34
0x30
0x31
0x2B
0x0D
Example 2: Set Brightness as 176 for Display-02 and this command is NOT valid.
Send (Hex Format)
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
CR
Hex
0x38
0x30
0x32
0x73
0x24
0x31
0x37
0x36
0x0D
Reply (Hex Format)
Name
Length
ID
Command
type
CR
Hex
0x34
0x30
0x31
0x2D
0x0D
Example 3: Set Tint as 32 for Display -03 and this command is valid.
Send (Hex Format)
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
CR
Hex
0x38
0x30
0x33
0x73
0x27
0x30
0x33
0x32
0x0D
Reply (Hex Format)
Name
Length
ID
Command
type
CR

8
Hex
0x34
0x30
0x31
0x2B
0x0D
Example 4: Set Tint as 75 for Display -03 and this command is NOT valid.
Send (Hex Format)
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
CR
Hex
0x38
0x30
0x33
0x73
0x27
0x30
0x37
0x35
0x0D
Reply (Hex Format)
Name
Length
ID
Command
type
CR
Hex
0x34
0x30
0x31
0x2D
0x0D
Example 5: Set Brightness as 76 for all Display and this command is valid.
Send (Hex Format)
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
CR
Hex
0x38
0x39
0x39
0x73
0x24
0x30
0x37
0x36
0x0D
No Reply.
Set-function table
Set
Function
Len
Cmd
Type
Cmd Code
(Hex)
RS232 (ASCII Bytes)
LAN (ASCII Bytes)
Power
8
s
21
000 : ---- / Monitor Off
000 :Monitor Off (Blacklight off +mute)
001 : On / Monitor On
001 :Monitor On (Blacklight on + last
status)
002 : Standby (or android off)
002 : Standby (android off)
003 : Reboot System
003 : Reboot System
Video
Source
8
s
22
000 : VGA
000 : VGA
001 : HDMI1
001 : HDMI1

9
002: HDMI2
002: HDMI2
006 : DVI-D
006 : DVI-D
007 : DisplayPort
007 : DisplayPort
101 : android
101 : android
Contrast
8
S
23
000 ~ 100
000 ~ 100
Brightness
8
S
24
000 ~ 100
000 ~ 100
Sharpness
8
S
25
000 ~ 100
000 ~ 100
Aspect
Ratio
8
S
31
000 : Full
000 : Full
001 : 4:3
001 : 4:3
002 : 1:1
002 : 1:1
003 : 16:9
003 : 16:9
Language
8
S
32
000: English
000: English
001: Français
001: Français
002: Español
002: Español
003: 繁中
003: 繁中
004: 简中
004: 简中
005: Português
005: Português
006: German
006: German
007: Dutch
007: Dutch
008: Polish
008: Polish
009: Russia
009: Russia
010:Czech
010:Czech
011:Danish
011:Danish
012:Swedish
012:Swedish
013:Italian
013:Italian

10
014:Romanian
014:Romanian
015:Norwegian
015:Norwegian
016:Finnish
016:Finnish
017:Greek
017:Greek
019:Arabic
019:Arabic
020:Japanse
020:Japanse
021: Thailand
021: Thailand
022: Korean
022: Korean
023 : Hungarian
023 : Hungarian
024 : Persian
024 : Persian
025 : Vietnamese
025 : Vietnamese
Sound
Mode
8
s
33
001 : Standard
001 : Standard
002: Class
002: Class
003: Movie
003: Movie
004: Meeting
004: Meeting
005: Custom
005: Custom
Volume
8
s
35
000 ~ 100
000 ~ 100
Mute
8
s
36
000: Off
000: Off
001: On
001: On
Balance
8
s
39
000~100
000~100
Treble
8
s
37
000~100
000~100
Bass
8
s
38
000~100
000~100
Reomte
comtrol
command
8
s
40
000 : Vol +
000 : Vol +
001 : Vol -
001 : Vol -
010 : Remote Up
010 : Remote Up

11
011 : Remote Down
011 : Remote Down
012 : Remote Left
012 : Remote Left
013 : Remote Right
013 : Remote Right
014 : Remote OK
014 : Remote OK
020 : Remote Menu Key
020 : Remote Menu Key
021 : Remote Input source
021 : Remote Input source
022 : Remote Exit
022 : Remote Exit
031 : Blank
031 : Blank
032 : Freeze
032 : Freeze
040 : X-Sign
040 : X-Sign
041 : WPS
041 : WPS
042 : Mediaplayer
042 : Mediaplayer
043 : Android Setting
043 : Android Setting
IR Control
8
s
42
000: Disable
000: Disable
001: Enable
001: Enable
Button&IR
Control
8
s
43
000: Disable
000: Disable
001: Enable
001: Enable
Button
Control
8
s
45
000: Disable
000: Disable
001: Enable
001: Enable
Pixel Shift
8
s
47
000: Off
000: Off
001: On
001: On
Picture
Mode
s
81
000: Standard
000: Standard
001: Bright
001: Bright
002 : Soft
002 : Soft
003 : Custom
003 : Custom

12
Saturatuin /
Chroma
8
s
82
000 ~ 100
000 ~ 100
Hue
8
s
83
000 ~ 100
000 ~ 100
Backlight
8
s
84
000 ~ 100
000 ~ 100
DCR
8
s
85
000: Off
000: Off
001: On
001: On
Color
Temp
8
s
86
000 : Cool
000 : Cool
001 : Standard
001 : Standard
002 : Warm
002 : Warm
Auto
Adjustment
Execute
8
s
8F
<---
RTC Year
8
s
98
000 ~ 099
000 ~ 099
RTC Month
8
s
99
001 ~ 012
001 ~ 012
RTC Day
8
s
9A
001 ~ 031
001 ~ 031
RTC Hour
8
s
9B
000 ~ 023
000 ~ 023
RTC Minute
8
s
9C
000 ~ 059
000 ~ 059
Power Save
8
s
A9
000: Off
000: Off
001: Low
001: Low
002: High
002: High
Switch on
Staus
8
s
AB
000 : Power Off
000 : Power Off
001 : Force On
001 : Force On
002 : Last Status
002 : Last Status
On/Off
Timer
14
s
E0
Byte1~Byte9
(1) Byte1: Decide which Timer is selected,
and its enable/disable setting.
Byte1[3:0]=0x1~0x07. There are totally 7
Timers, this value is used to decide which
Timer is selected.
Byte1[7]: Reserved, should be 0.
Byte1~Byte9
(1) Byte1: Decide which Timer is
selected, and its enable/disable setting.
Byte1[3:0]=0x1~0x07. There are totally
7 Timers, this value is used to decide
which Timer is selected.
Byte1[7]: Reserved, should be 0.

13
Byte1[6]: The Timer is enable or not.
Byte1[6]=1 means enable.
Byte1[5]: The On Timer is enable or not.
Byte1[5]=1 means enable.
Byte1[4]: The Off Timer is enable or not.
Byte1[4]=1 means enable.
(2) Byte2: The Day of the On/Off Timer.
bit0 for Sunday, bit1 for Monday, bit2 for
Tuesday, bit3 for Wednesday, bit4 for
Thursday, bit5 for Friday, bit6 for
Saturday, bit7 for Everday.
(3) Byte3: The Hour of the On Timer.
Byte3=0x00~0x17.
(4) Byte4: The Minute of the On Timer.
Byte4=0x00~0x3B.
(5) Byte5: The Hour of the Off Timer.
Byte5=0x00~0x17.
(6) Byte6: The Minute of the Off Timer.
Byte6=0x00~0x3B.
(7) Byte7: Select the Video Source.
0x00=VGA, 0x01=HDMI1, 0x02=HDMI2,
0x03=AV, 0x04=YPbPr,
0x05=S-Video, 0x06=DVI,
0x07=DisplayPort, 0x08=SDI,
0x09=Multi-Media.
0x0A=Network, 0x0B=USB Display
(8) Byte8~9 are reserved, and should be
0x00.
Byte1[6]: The Timer is enable or not.
Byte1[6]=1 means enable.
Byte1[5]: The On Timer is enable or not.
Byte1[5]=1 means enable.
Byte1[4]: The Off Timer is enable or not.
Byte1[4]=1 means enable.
(2) Byte2: The Day of the On/Off Timer.
bit0 for Sunday, bit1 for Monday, bit2 for
Tuesday, bit3 for Wednesday, bit4 for
Thursday, bit5 for Friday, bit6 for
Saturday, bit7 for Everday.
(3) Byte3: The Hour of the On Timer.
Byte3=0x00~0x17.
(4) Byte4: The Minute of the On Timer.
Byte4=0x00~0x3B.
(5) Byte5: The Hour of the Off Timer.
Byte5=0x00~0x17.
(6) Byte6: The Minute of the Off Timer.
Byte6=0x00~0x3B.
(7) Byte7: Select the Video Source.
0x00=VGA, 0x01=HDMI1,
0x02=HDMI2, 0x03=AV, 0x04=YPbPr,
0x05=S-Video, 0x06=DVI,
0x07=DisplayPort, 0x08=SDI,
0x09=Multi-Media.
0x0A=Network, 0x0B=USB Display
(8) Byte8~9 are reserved, and should be
0x00.
WOL
8
s
F0
000: Off
000: Off
001: On
001: On
Image
Noise
Reduction
8
s
F1
000 : Off
000 : Off
001 : Low
001 : Low
002 : Middle
002 : Middle
003 : Highest
003 : Highest
EDID
8
s
F2
000 : EDID 1.4
000 : EDID 1.4

14
001 : EDID 2.0
001 : EDID 2.0
Set
Function
Len
Cmd
Type
Cmd Code
(Hex)
RS232/LAN
Remark
Video
Source
8
s
22
000 :VGA
001 : HDMI1
002 : HDMI2
006 : DVI-D
007 : DisplayPort
101: Android
Contrast
8
s
23
000 ~ 100
Brightness
8
s
24
000 ~ 100
Aspect
Ratio
8
s
31
000 : Full
001 : 4:3
002 : 1:1
003 : 16:9
Language
8
s
32
000: English
001: Français
002: Español
003: 繁中
004: 简中
005: Português
006: German
007: Dutch
008: Polish
009: Russia
010:Czech
011:Danish
012:Swedish
013:Italian
014:Romanian
015:Norwegian
016:Finnish
017:Greek
019:Arabic
020:Japanse
021:Thailand
022:Korean

15
023:Hungarian
024:Persian
025:Vietnamese
Sound
Mode
8
s
33
001 : Standard
002: Class
003: Movie
004: Meeting
005: Custom
Volume
8
s
35
000 ~ 100
Mute
8
s
36
000: Off
001: On
Balance
8
s
39
000~100
Remote
control
8
s
40
000 : Vol+ (right)
001 : Vol- (left)
010 : Remote (up)
011 : Remote (down)
012 : Remote (left)
013 : Remote (right)
014 : Remote (ok)
020 : Remote Menu Key
021 : Remote Input source
022 : Remote Exit
031 : Blank
032 : Freeze
040 : X-Sign
041 : WPS
042 : Mediaplayer
043 : Android Setting
IR Control
8
s
42
000: Disable
001: Enable
Button&IR
Control
8
s
43
000: Disable
001: Enable
Button
Control
8
s
45
000: Disable
001: Enable
Pixel Shift
8
s
47
000: Off
001: On
Picture
Mode
8
s
81
000: Standard
001: Bright

16
002: Soft
003: Custom
Backlight
8
s
84
000 ~ 100
DCR
8
s
85
000: Off
001: On
Color
Temp
8
s
86
000 : Cool
001 : Normal
002 : Warm
RTC Year
8
s
98
000 ~ 099
RTC Month
8
s
99
001 ~ 012
RTC Day
8
s
9A
001 ~ 031
RTC Hour
8
s
9B
000 ~ 023
RTC Minute
8
s
9C
000 ~ 059
Power Save
8
s
A9
000: Power Off
001: Force On
002: Last Status
On/Off
Timer
14
s
E0
Byte1~Byte9
(1) Byte1: Decide which Timer is selected,
and its enable/disable setting.
Byte1[3:0]=0x1~0x07. There are totally 7
Timers, this value is used to decide which
Timer is selected.
Byte1[7]: Reserved, should be 0.
Byte1[6]: The Timer is enable or not.
Byte1[6]=1 means enable.
Byte1[5]: The On Timer is enable or not.
Byte1[5]=1 means enable.
Byte1[4]: The Off Timer is enable or not.
Byte1[4]=1 means enable.
(2) Byte2: The Day of the On/Off Timer.
bit0 for Sunday, bit1 for Monday, bit2 for
Tuesday, bit3 for Wednesday, bit4 for
Thursday, bit5 for Friday, bit6 for
Saturday, bit7 for Everday.
(3) Byte3: The Hour of the On Timer.
Byte3=0x00~0x17.

17
(4) Byte4: The Minute of the On Timer.
Byte4=0x00~0x3B.
(5) Byte5: The Hour of the Off Timer.
Byte5=0x00~0x17.
(6) Byte6: The Minute of the Off Timer.
Byte6=0x00~0x3B.
(7) Byte7: Select the Video Source.
0x00=VGA, 0x01=HDMI1, 0x02=HDMI2,
0x03=AV, 0x04=YPbPr,
0x05=S-Video, 0x06=DVI,
0x07=DisplayPort, 0x08=SDI,
0x09=Multi-Media.
0x0A=Network, 0x0B=USB Display
(8) Byte8~9 are reserved, and should be
0x00.
Get-function listing
The PC can interrogate the LCD Monitor for specific information. The Get-Function packet format
consists of 5 bytes which are similar to the Set-Function packet structure. Note that the "Value" byte is
always = 00.
Get-function description
Item
Description
Length
Total Bytes of messages excluding "CR"
Display ID
Identification for each of display V
Command Type
Identify command type,
"g" (0x67h): Get Command
Command
Function command code: One byte ASCII code
Value [1~3]
Three bytes ASCII that defines the value
NOTE: To get backlight senor, thermal sensor, and ambient sensor,
you need four bytes ASCII that defines the value and the length is 9.
CR
0x0D

18
Get-function format
Send: (Command Type="g")
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
CR
Byte count
1 Byte
2 Byte
1 Byte
1 Byte
1 Byte
1 Byte
1 Byte
1 Byte
Bytes
order
1
2~3
4
5
6
7
8
9
Reply: (Command Type="r" or "-")
If the Command is valid, Command Type ="r"
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
CR
Byte count
1 Byte
2 Byte
1 Byte
1 Byte
1 Byte
1 Byte
1 Byte
1 Byte
Bytes
order
1
2~3
4
5
6
7
8
9
If the Command is Not valid, Command Type="-"
Name
Length
ID
Command
type
CR
Bytecount
1 Byte
2 Byte
1 Byte
1 Byte
Bytes
order
1
2~3
4
5
Example 1: Get Brightness from Display -05 and this command is valid.
The Brightness value is 67.
Send (Hex Format)
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
CR
Hex
0x38
0x30
0x35
0x67
0x62
0x30
0x30
0x30
0x0D
Reply (Hex Format)
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
CR

19
Hex
0x38
0x30
0x35
0x72
0x62
0x30
0x36
0x37
0x0D
Example 3: Get Tint from Display -0007 and this command is valid.
The Tint value is 32.
Send (Hex Format)
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
CR
Hex
0x38
0x30
0x37
0x67
0X65
0x30
0x30
0x30
0x0D
Reply (Hex Format)
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
CR
Hex
0x38
0x30
0x37
0x72
0x65
0x30
0x33
0x32
0x0D
Example 4: Get Tint from Display -07, but the Brightness command ID is error and it is NOT in the
command table.
Send (Hex Format)
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
CR
Hex
0x38
0x30
0x37
0x67
0XD7
0x30
0x30
0x30
0x0D
Reply (Hex Format)
Name
Length
ID
Command
type
CR
Hex
0x34
0x30
0x31
0x2D
0x0D
Example 5: Get backlight sensor from Display -0007 and this command is valid.
The lux value is 1786 (ASCII code).
Send (Hex Format)

20
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
Value4
CR
Hex
0x39
0x30
0x37
0x67
0X6F
0x30
0x30
0x30
0x30
0x0D
Reply (Hex Format)
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
Value4
CR
Hex
0x39
0x30
0x37
0x72
0X6F
0x31
0x37
0x38
0x36
0x0D
Example 6: Get ambient sensor from Display -0007 and this command is valid.
The lux value is 1568 (ASCII code).
Send (Hex Format)
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
Value4
CR
Hex
0x39
0x30
0x37
0x67
0X70
0x30
0x30
0x30
0x30
0x0D
Reply (Hex Format)
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
Value4
CR
Hex
0x39
0x30
0x37
0x72
0X70
0x31
0x35
0x36
0x38
0x0D
Example 7: Get thermal sensor from Display -0007 and this command is valid.
The value is +075 degree (ASCII code).
NOTE: Positive degree is "+"ASCII code and negative degree is "-"ASCII code.
Send (Hex Format)
Name
Length
ID
Command
type
Command
Value1
Value2
Value3
Value4
CR
Hex
0x39
0x30
0x37
0x67
0X71
0x30
0x30
0x30
0x30
0x0D
Reply (Hex Format)