Contents hide
1 BenQ LW855UST, LH856UST Projector RS232 Command Control
2 Product Usage Instructions
3 Introduction
4 Wire arrangement
5 RS232 pin assignment
6 Connections and communication settings
7 RS232 via LAN
8 RS232 via HDBaseT
9 Command table
10 FAQ Video
11 Documents / Resources
11.1 References
12 Related Posts

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BenQ LW855UST, LH856UST Projector RS232 Command Control

BenQ-LW855UST-LH856UST-Projector-RS232-Command-Control-PRODUCT-IMAGE

Specifications

  • Model: LW855UST/ LH856UST Projector
  • Control Method: RS232 Command Control
  • Connection Options: RS232 serial port, LAN, HDBaseT
  • Baud Rate: 115200 bps (default, changeable settings available)
  • Data Length: 8 bit
  • Parity Check: None
  • Stop Bit: 1 bit
  • Flow Control: None

Product Usage Instructions

  1. RS232 Serial Port Connection
    For connecting via RS232 serial port:
    1. Connect D-Sub 9 pin (male) on the projector to a PC or laptop using a communication cable (crossover).
    2. Set up the COM Port name in Device Manager and choose the corresponding COM port (e.g., COM6).
    3. Adjust Serial port settings including Baud rate, Data length, Parity check, Stop bit, and Flow control based on your requirements.
  2. RS232 via LAN
    For connecting via LAN:
    1. Connect the RJ45 port on the projector to a PC or laptop using a LAN cable.
    2. Ensure both the projector and computer are on the same network.
    3. In the OSD menu, find the Wired LAN IP address of the projector and input 8000 in the TCP port # field.
  3.  RS232 via HDBaseT
    For connecting via HDBaseT:
    1. Connect the HDBaseT compatible device to the RJ45 port on the projector using a LAN cable.
    2. Set up the COM Port name in Device Manager and choose the corresponding COM port.
    3. Adjust Serial port settings including Baud rate, Data length, Parity check, Stop bit, and Flow control based on your requirements.

Frequently Asked Questions (FAQ)

  1. Q: What are the available functions for RS232 control?
    A: The available functions include Power On, Power off, Power Status, Source Selection, Audio Control, Mute On/Off, Volume +/-, and more. Refer to the command table in the manual for a detailed list of functions.

Introduction

The document describes how to control your BenQ projector via RS232 from a computer. Follow the procedures to complete the connection and settings first, and refer to the command table for RS232 commands.
Available functions and commands vary by model. Check the specifications and user manual of the purchased projector for product functions.

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

BenQ-LW855UST-LH856UST-Projector-RS232-Command-Control- (1)

Pin Description Pin Description
1 NC 2 RXD
3 TXD 4 NC
5 GND 6 NC
7 RTS 8 CTS
9 NC

Connections and communication settings

Choose one of the connections and set up properly before RS232 control.
RS232 serial port with a crossover cable

BenQ-LW855UST-LH856UST-Projector-RS232-Command-Control- (2)

Settings
On-screen images in this document are for reference only. The screens may vary depending on your Operating System, I/O ports used for connection, and the specifications of the connected projector.

  1. Determine the COM Port name used for the RS232 communications in Device Manager.BenQ-LW855UST-LH856UST-Projector-RS232-Command-Control- (3)
  2. Choose Serial and the corresponding COM port as the communication port. In this given example, COM6 is selected.BenQ-LW855UST-LH856UST-Projector-RS232-Command-Control- (4)
  3. Finish Serial port setup.BenQ-LW855UST-LH856UST-Projector-RS232-Command-Control- (5)
Baud rate 115200 bps (default) Changeable settings in User OSD (9600/14400/19200/38400/57600/115200)
Data length 8 bit
Parity check None
Stop bit 1 bit
Flow control None

RS232 via LAN

BenQ-LW855UST-LH856UST-Projector-RS232-Command-Control- (6)

Settings 

  1. Find the Wired LAN IP address of the connected projector from the OSD menu and make sure the projector and the computer are within the same network.
  2.  Input 8000 in the TCP port # field.BenQ-LW855UST-LH856UST-Projector-RS232-Command-Control- (7)

RS232 via HDBaseT

BenQ-LW855UST-LH856UST-Projector-RS232-Command-Control- (8)

Settings 

  1. Determine the COM Port name used for the RS232 communications in Device Manager.
  2. Choose Serial and the corresponding COM port as the communication port. In this given example, COM6 is selected.BenQ-LW855UST-LH856UST-Projector-RS232-Command-Control- (9)
  3. Finish Serial port setup.BenQ-LW855UST-LH856UST-Projector-RS232-Command-Control- (10)
Baud rate 115200 bps (default) Changeable settings in User OSD (9600/14400/19200/38400/57600/115200)
Data length 8 bit
Parity check None
Stop bit 1 bit
Flow control None

Command table

  • Available features differ by projector specification, input sources, settings, etc..
  • Commands are working if the standby power is 0.5W or a supported baud rate of the projector is set.
  • Uppercase, lowercase, and a mixture of both types of characters are accepted for a command.
  • If a command format is illegal, it will echo Illegal format.
  • If a command with correct format is not valid for the projector model, it will echo Unsupported item.
  • If a command with correct format cannot be executed under certain condition, it will echo Block item.
  • If RS232 control is performed via LAN, a command works whether it starts and ends with <CR>. All the commands and behaviors are identical with the control through a serial port.
Function Type Operation ASCII Support
Power Write Power On <CR>*pow=on#<CR> Yes
Write Power off <CR>*pow=off#<CR> Yes
Read Power Status <CR>*pow=?#<CR> Yes
Source Selection Write COMPUTER/YPbPr <CR>*sour=RGB#<CR> Yes
Write COMPUTER 2/YPbPr2 <CR>*sour=RGB2#<CR> No
Write COMPUTER 3/YPbPr3 <CR>*sour=RGB3#<CR> No
Write Component <CR>*sour=ypbr#<CR> No
Write Component2 <CR>*sour=ypbr2#<CR> No
Write DVI-A <CR>*sour=dviA#<CR> No
Write DVI-D <CR>*sour=dvid#<CR> No
Write HDMI(MHL) <CR>*sour=hdmi#<CR> Yes
Write HDMI 2(MHL2) <CR>*sour=hdmi2#<CR> Yes
Write Composite <CR>*sour=vid#<CR> No
Write S-Video <CR>*sour=svid#<CR> No
Write Network <CR>*sour=network#<CR> No
Write USB Display <CR>*sour=usbdisplay#<CR> No
Write USB Reader <CR>*sour=usbreader#<CR> No
Write HDBaseT <CR>*sour=hdbaset#<CR> No
Write DisplayPort <CR>*sour=dp#<CR> No
Write 3G-SDI <CR>*sour=sdi#<CR> No
Write Smart System <CR>*sour=smartsystem#<CR> No
Read Current source <CR>*sour=?#<CR> Yes
Audio Control Write Mute On <CR>*mute=on#<CR> Yes
Write Mute Off <CR>*mute=off#<CR> Yes
Read Mute Status <CR>*mute=?#<CR> Yes
Write Volume + <CR>*vol=+#<CR> Yes
Write Volume – <CR>*vol=-#<CR> Yes
Write Volume level for

customer

 <CR>*vol=value#<CR> Yes
Read Volume Status <CR>*vol=?#<CR> Yes
Write Mic. Volume + <CR>*micvol=+#<CR> Yes
Write Mic. Volume – <CR>*micvol=-#<CR> Yes
Read Mic. Volume Status <CR>*micvol=?#<CR> Yes
Audio source select Write Audio pass Through

off

 <CR>*audiosour=off#<CR> Yes
Write Audio-Computer1 <CR>*audiosour=RGB#<CR> Yes
Write Audio-Computer2 <CR>*audiosour=RGB2#<CR> No
Write Audio-Video/S-Video <CR>*audiosour=vid#<CR> No
Write Audio-Component <CR>*audiosour=ypbr#<CR> No
Write Audio-HDMI <CR>*audiosour=hdmi#<CR> Yes
Write Audio-HDMI2 <CR>*audiosour=hdmi2#<CR> Yes
Write Audio-HDMI3 <CR>*audiosour=hdmi3#<CR> No
Write DisplayPort <CR>*audiosour=dp#<CR> Yes
Write HDBaseT <CR>*audiosour=hdbaset#<CR> Yes
Write Microphone <CR>*audiosour=microphone#<CR> Yes
Read Audio pass Status <CR>*audiosour=?#<CR> Yes
Picture Mode Write Dynamic <CR>*appmod=dynamic#<CR> No
Write Presentation <CR>*appmod=preset#<CR> Yes
Write sRGB <CR>*appmod=srgb#<CR> Yes
Write Bright <CR>*appmod=bright#<CR> Yes
Write Living Room <CR>*appmod=livingroom#<CR> No
Write Game <CR>*appmod=game#<CR> No
Write Cinema(Rec. 709) <CR>*appmod=cine#<CR> No
Write Standard <CR>*appmod=std#<CR> No
Write Football <CR>*appmod=football#<CR> No
Write Football Bright <CR>*appmod=footballbt#<CR> No
Write DICOM <CR>*appmod=dicom#<CR> No
Write THX <CR>*appmod=thx#<CR> No
Write Silence mode <CR>*appmod=silence#<CR> No
Write DCI-P3

mode(D.Cinema)

 <CR>*appmod=dci-p3#<CR> No
Write Vivid <CR>*appmod=vivid#<CR> No
Write Infographic <CR>*appmod=infographic#<CR> No
Write User1 <CR>*appmod=user1#<CR> Yes
Write User2 <CR>*appmod=user2#<CR> Yes
Write User3 <CR>*appmod=user3#<CR> No
Write ISF Day <CR>*appmod=isfday#<CR> No
Write ISF Night <CR>*appmod=isfnight#<CR> No
Write 3D <CR>*appmod=threed#<CR> Yes
Write Sport <CR>*appmod=sport#<CR> No
Write HDR10 <CR>*appmod=hdr10<CR> Yes
Write HLG <CR>*appmod=hlg<CR> Yes
Write Video <CR>*appmod=video<CR> Yes
Read Picture Mode <CR>*appmod=?#<CR> Yes
Picture Setting Write Contrast + <CR>*con=+#<CR> Yes
Write Contrast – <CR>*con=-#<CR> Yes
Write Set Contrast value <CR>*con=5#<CR> Yes
Read Contrast value <CR>*con=?#<CR> Yes
Write Brightness + <CR>*bri=+#<CR> Yes
Write Brightness – <CR>*bri=-#<CR> Yes
Write Set Brightness value <CR>*bri=5#<CR> Yes
Read Brightness value <CR>*bri=?#<CR> Yes
Write Color + <CR>*color=+#<CR> Yes
Write Color – <CR>*color=-#<CR> Yes
Write Set Color value <CR>*color=5#<CR> Yes
Read Color value <CR>*color=?#<CR> Yes
Write Sharpness + <CR>*sharp=+#<CR> Yes
Write Sharpness – <CR>*sharp=-#<CR> Yes
Write Set Sharpness value <CR>*sharp=5#<CR> Yes
Read Sharpness value <CR>*sharp=?#<CR> Yes
Write Flesh Tone + <CR>*fleshtone=+#<CR> No
Write Flesh Tone – <CR>*fleshtone=-#<CR> No
Write Set Flesh Tone value <CR>*fleshtone=5#<CR> No
Read Flesh Tone value <CR>*fleshtone=?#<CR> No
Write Color

Temperature-Warmer

 <CR>*ct=warmer#<CR> No
Write Color

Temperature-Warm

 <CR>*ct=warm#<CR> Yes
Write Color

Temperature-Normal

 <CR>*ct=normal#<CR> Yes
Write Color <CR>*ct=cool#<CR> Yes
Temperature-Cool
Write Color

Temperature-Cooler

 <CR>*ct=cooler#<CR> No
 

Write

 Color

Temperature-lamp

native

  

<CR>*ct=native#<CR>

  

No
Read Color Temperature

Status

 <CR>*ct=?#<CR> Yes
Write Aspect 4:3 <CR>*asp=4:3#<CR> Yes
Write Aspect 16:6 <CR>*asp=16:6#<CR> No
Write Aspect 16:9 <CR>*asp=16:9#<CR> Yes
Write Aspect 16:10 <CR>*asp=16:10#<CR> Yes
Write Aspect 2.35:1 <CR>*asp=2.35#<CR> No
Write Aspect Auto <CR>*asp=AUTO#<CR> Yes
Write Aspect Real <CR>*asp=REAL#<CR> No
Write Aspect Letterbox <CR>*asp=LBOX#<CR> No
Write Aspect Wide <CR>*asp=WIDE#<CR> No
Write Aspect Anamorphic <CR>*asp=ANAM#<CR> No
Write Aspect Anamorphic

2.35

 <CR>*asp=ANAM2.35#<CR> No
Write Aspect Anamorphic

16:9

 <CR>*asp=ANAM16:9#<CR> No
Write Aspect 2.4:1 <CR>*asp=2.4#<CR> No
Read Aspect Status <CR>*asp=?#<CR> Yes
Write Vertical Keystone + <CR>*vkeystone=+#<CR> Yes
Write Vertical Keystone – <CR>*vkeystone=-#<CR> Yes
Write Set Vertical Keystone

value

 <CR>*vkeystone=value#<CR> Yes
Read Vertical Keystone

value

 <CR>*vkeystone=?#<CR> Yes
Write Horizontal Keystone + <CR>*hkeystone=+#<CR> Yes
Write Horizontal Keystone – <CR>*hkeystone=-#<CR> Yes
Write Set Horizontal

Keystone value

 <CR>*hkeystone=value#<CR> Yes
Read Horizontal Keystone

value

 <CR>*hkeystone=?#<CR> Yes
Write Overscan Adjustment

+

 <CR>*overscan=+#<CR> No
Write Overscan Adjustment

–

 <CR>*overscan=-#<CR> No
Read Overscan Adjustment

value

 <CR>*overscan=?#<CR> No
Write 4 Corners Top-Left-X

Decrease

 <CR>*cornerfittlx=-#<CR> Yes
Write 4 Corners Top-Left-X

Increase

 <CR>*cornerfittlx=+#<CR> Yes
Read 4 Corners Top-Left-X

Status

 <CR>*cornerfittlx=?#<CR> Yes
Write 4 Corners Top-Left-Y

Decrease

 <CR>*cornerfittly=-#<CR> Yes
Write 4 Corners Top-Left-Y

Increase

 <CR>*cornerfittly=+#<CR> Yes
Read 4 Corners Top-Left-Y

Status

 <CR>*cornerfittly=?#<CR> Yes
Write 4 Corners

Top-Right-X Decrease

 <CR>*cornerfittrx=-#<CR> Yes
Write 4 Corners

Top-Right-X Increase

 <CR>*cornerfittrx=+#<CR> Yes
Read 4 Corners

Top-Right-X Status

 <CR>*cornerfittrx=?#<CR> Yes
Write 4 Corners

Top-Right-Y Decrease

 <CR>*cornerfittry=-#<CR> Yes
Write 4 Corners

Top-Right-Y Increase

 <CR>*cornerfittry=+#<CR> Yes
Read 4 Corners

Top-Right-Y Status

 <CR>*cornerfittry=?#<CR> Yes
 

Write

 4 Corners Bottom-Left-X

Decrease

  

<CR>*cornerfitblx=-#<CR>

  

Yes
 

Write

 4 Corners

Bottom-Left-X Increase

  

<CR>*cornerfitblx=+#<CR>

  

Yes
Read 4 Corners

Bottom-Left-X Status

 <CR>*cornerfitblx=?#<CR> Yes
Write 4 Corners

Bottom-Left-Y

 <CR>*cornerfitbly=-#<CR> Yes
Decrease
 

Write

 4 Corners

Bottom-Left-Y Increase

  

<CR>*cornerfitbly=+#<CR>

  

Yes
Read 4 Corners

Bottom-Left-Y Status

 <CR>*cornerfitbly=?#<CR> Yes
 

Write

 4 Corners

Bottom-Right-X Decrease

  

<CR>*cornerfitbrx=-#<CR>

  

Yes
 

Write

 4 Corners Bottom-Right-X

Increase

  

<CR>*cornerfitbrx=+#<CR>

  

Yes
 

Read

 4 Corners

Bottom-Right-X Status

  

<CR>*cornerfitbrx=?#<CR>

  

Yes
 

Write

 4 Corners Bottom-Right-Y

Decrease

  

<CR>*cornerfitbry=-#<CR>

  

Yes
 

Write

 4 Corners

Bottom-Right-Y Increase

  

<CR>*cornerfitbry=+#<CR>

  

Yes
 

Read

 4 Corners Bottom-Right-Y

Status

  

<CR>*cornerfitbry=?#<CR>

  

Yes
Write Digital Zoom In <CR>*zoomI#<CR> Yes
Write Digital Zoom out <CR>*zoomO#<CR> Yes
Write Auto <CR>*auto#<CR> Yes
Write Brilliant color + <CR>*BC=+#<CR> Yes
Write Brilliant color – <CR>*BC=-#<CR> Yes
Write Brilliant color set

value

 <CR>*BC=value#<CR> Yes
Read Brilliant color status <CR>*BC=?#<CR> Yes
Write Auto(HDR) <CR>*hdr=auto#<CR> No
Write SDR <CR>*hdr=sdr#<CR> No
Write HDR10 <CR>*hdr=hdr#<CR> No
Write HLG <CR>*hdr=hlg#<CR> No
Write HDR status <CR>*hdr=?#<CR> No
Write Reset current picture <CR>*rstcurpicsetting#<CR> No
settings
Write Reset all picture

settings

 <CR>*rstallpicsetting#<CR> No
Write Reset picture settings <CR>*rstpicsetting#<CR> Yes
 

 

 

 

 

 

 

 

 

 

 

 

 

 

Operation Settings

 Write Projector

Position-Front Table

 <CR>*pp=FT#<CR> Yes
Write Projector

Position-Rear Table

 <CR>*pp=RE#<CR> Yes
Write Projector

Position-Rear Ceiling

 <CR>*pp=RC#<CR> Yes
Write Projector

Position-Front Ceiling

 <CR>*pp=FC#<CR> Yes
Read Projector Position

Status

 <CR>*pp=?#<CR> Yes
Write Quick cooling on <CR>*qcool=on<CR> No
Write Quick cooling off <CR>*qcool=off<CR> No
Read Quick cooling status <CR>*qcool=?<CR> No
Write Quick auto search <CR>*QAS=on#<CR> Yes
Write Quick auto search <CR>*QAS=off#<CR> Yes
Read Quick auto search

status

 <CR>*QAS=?#<CR> Yes
Write Menu Position –

Center

 <CR>*menuposition=center#<CR> No
Write Menu Position –

Top-Left

 <CR>*menuposition=tl#<CR> No
Write Menu Position –

Top-Right

 <CR>*menuposition=tr#<CR> No
Write Menu Position –

Bottom-Right

 <CR>*menuposition=br#<CR> No
Write Menu Position –

Bottom-Left

 <CR>*menuposition=bl#<CR> No
Read Menu Position Status <CR>*menuposition=?#<CR> No
Write Direct Power On-on <CR>*directpower=on#<CR> Yes
Write Direct Power On-off <CR>*directpower=off#<CR> Yes
Read Direct Power

On-Status

 <CR>*directpower=?#<CR> Yes
Write Signal Power On-on <CR>*autopower=on#<CR> Yes
Write Signal Power On-off <CR>*autopower=off#<CR> Yes
Read Signal Power

On-Status

 <CR>*autopower=?#<CR> Yes
Write Standby

Settings-Network on

 <CR>*standbynet=on#<CR> No
Write Standby

Settings-Network off

 <CR>*standbynet=off#<CR> No
 

Read

 Standby

Settings-Network Status

  

<CR>*standbynet=?#<CR>

  

No
 

Write

 Standby

Settings-Microphone on

  

<CR>*standbymic=on#<CR>

  

No
 

Write

 Standby

Settings-Microphone off

  

<CR>*standbymic=off#<CR>

  

No
 

Read

 Standby

Settings-Microphone

Status

  

<CR>*standbymic=?#<CR>

  

No
 

Write

 Standby

Settings-Monitor Out on

  

<CR>*standbymnt=on#<CR>

  

No
 

Write

 Standby

Settings-Monitor Out off

  

<CR>*standbymnt=off#<CR>

  

No
 

Read

 Standby

Settings-Monitor Out

Status

  

<CR>*standbymnt=?#<CR>

  

No
 

 

 

 

Baud Rate

 Write 2400 <CR>*baud=2400#<CR> No
Write 4800 <CR>*baud=4800#<CR> No
Write 9600 <CR>*baud=9600#<CR> Yes
Write 14400 <CR>*baud=14400#<CR> Yes
Write 19200 <CR>*baud=19200#<CR> Yes
Write 38400 <CR>*baud=38400#<CR> Yes
Write 57600 <CR>*baud=57600#<CR> Yes
Write 115200 <CR>*baud=115200#<CR> Yes
Read Current Baud Rate <CR>*baud=?#<CR> Yes
Lamp Control Read Lamp Hour <CR>*ltim=?#<CR> Yes
Read Lamp2 Hour <CR>*ltim2=?#<CR> No
Write Normal mode <CR>*lampm=lnor#<CR> Yes
Write Eco mode <CR>*lampm=eco#<CR> Yes
Write SmartEco mode <CR>*lampm=seco#<CR> No
Write SmartEco mode 2 <CR>*lampm= seco2#<CR> No
Write SmartEco mode 3 <CR>*lampm= seco3#<CR> No
Write Dimming mode <CR>*lampm=dimming#<CR> No
Write Custom mode <CR>*lampm=custom#<CR> Yes
Write Light level for custom

mode

 <CR>*lampcustom=value#<CR> Yes
Read Light level status for

custom mode

 <CR>*lampcustom=?#<CR> Yes
Write (dual

lamp)

  

Dual Brightest

  

<CR>* lampm =dualbr#<CR>

  

No
Write

(dual lamp)

  

Dual Reliable

  

<CR>* lampm =dualre#<CR>

  

No
Write

(dual lamp)

  

Single Alternative

  

<CR>* lampm =single#<CR>

  

No
Write

(dual lamp)

  

Single Alternative Eco

  

<CR>* lampm =singleeco#<CR>

  

No
Read Lamp Mode Status <CR>*lampm=?#<CR> Yes
Miscellaneous Read Model Name <CR>*modelname=?#<CR> Yes
Read System F/W Version <CR>*sysfwversion=?#<CR> Yes
Read Scaler F/W Version <CR>*scalerfwversion=?#<CR> Yes
Read Format F/W Version <CR>*formatfwversion=?#<CR> No
Read Lan F/W Version <CR>*lanfwversion=?#<CR> Yes
Read MCU F/W Version <CR>*mcufwversion=?#<CR> Yes
Read Ballast F/W Version <CR>*ballastfwversion=?#<CR> No
Write Blank On <CR>*blank=on#<CR> Yes
Write Blank Off <CR>*blank=off#<CR> Yes
Read Blank Status <CR>*blank=?#<CR> Yes
Write Freeze On <CR>*freeze=on#<CR> Yes
Write Freeze Off <CR>*freeze=off#<CR> Yes
Read Freeze Status <CR>*freeze=?#<CR> Yes
Write Menu On <CR>*menu=on#<CR> Yes
Write Menu Off <CR>*menu=off#<CR> Yes
Read Menu Status <CR>*menu=?#<CR> Yes
Write Up <CR>*up#<CR> Yes
Write Down <CR>*down#<CR> Yes
Write Right <CR>*right#<CR> Yes
Write Left <CR>*left#<CR> Yes
Write Enter <CR>*enter#<CR> Yes
Write Back <CR>*back#<CR> Yes
Write Source Menu On <CR>*sourmenu=on#<CR> Yes
Write Source Menu Off <CR>*sourmenu=off#<CR> Yes
Read Source Menu Status <CR>*sourmenu=?#<CR> Yes
Write 3D Sync Off <CR>*3d=off#<CR> Yes
Write 3D Auto <CR>*3d=auto#<CR> Yes
Write 3D Sync Top Bottom <CR>*3d=tb#<CR> Yes
Write 3D Sync Frame

Sequential

 <CR>*3d=fs#<CR> Yes
Write 3D Frame packing <CR>*3d=fp#<CR> Yes
Write 3D Side by side <CR>*3d=sbs#<CR> Yes
Write 3D inverter disable <CR>*3d=da#<CR> Yes
Write 3D inverter <CR>*3d=iv#<CR> Yes
Write 2D to 3D <CR>*3d=2d3d#<CR> No
Write 3D nVIDIA <CR>*3d=nvidia#<CR> No
Read 3D Sync Status <CR>*3d=?#<CR> Yes
Write Remote Receiver On <CR>*rr=on#<CR> No
Write Remote Receiver Off <CR>*rr=off#<CR> No
Write Remote

Receiver-front+rear

 <CR>*rr=fr#<CR> No
Write Remote

Receiver-front

 <CR>*rr=f#<CR> No
Write Remote Receiver-rear <CR>*rr=r#<CR> No
Write Remote Receiver-top <CR>*rr=t#<CR> No
Write Remote

Receiver-top+front

 <CR>*rr=tf#<CR> No
Write Remote

Receiver-top+rear

 <CR>*rr=tr#<CR> No
Read Remote Receiver

Status

 <CR>*rr=?#<CR> No
Write Instant On-on <CR>*ins=on#<CR> No
Write Instant On-off <CR>*ins=off#<CR> No
Read Instant On Status <CR>*ins=?#<CR> No
Write Lamp Saver Mode-on <CR>*lpsaver=on#<CR> No
Write Lamp Saver Mode-off <CR>*lpsaver=off#<CR> No
Read Lamp Saver Mode

Status

 <CR>*lpsaver=?#<CR> No
Write Projection Log In Code

on

 <CR>*prjlogincode=on#<CR> No
Write Projection Log In Code

off

 <CR>*prjlogincode=off#<CR> No
Read Projection Log In Code

Status

 <CR>*prjlogincode=?#<CR> No
Write Broadcasting on <CR>*broadcasting=on#<CR> No
Write Broadcasting off <CR>*broadcasting=off#<CR> No
Read Broadcasting Status <CR>*broadcasting=?<CR> No
Write AMX Device

Discovery-on

 <CR>*amxdd=on#<CR> Yes
Write AMX Device

Discovery-off

 <CR>*amxdd=off#<CR> Yes
Read AMX Device Discovery

Status

 <CR>*amxdd=?#<CR> Yes
Read Mac Address <CR>*macaddr=?#<CR> Yes
Read Serial Number <CR>*serial number=?#<CR> Yes
Write High Altitude mode on <CR>*Highaltitude=on#<CR> Yes
Write High Altitude mode off <CR>*Highaltitude=off#<CR> Yes
Read High Altitude mode

status

 <CR>*Highaltitude=?#<CR> Yes
Installation Write Load Lens memory 1 <CR>*lensload=m1#<CR> No
Write Load Lens memory 2 <CR>*lensload=m2#<CR> No
Write Load Lens memory 3 <CR>*lensload=m3#<CR> No
Write Load Lens memory 4 <CR>*lensload=m4#<CR> No
Write Load Lens memory 5 <CR>*lensload=m5#<CR> No
Write Load Lens memory 6 <CR>*lensload=m6#<CR> No
Write Load Lens memory 7 <CR>*lensload=m7#<CR> No
Write Load Lens memory 8 <CR>*lensload=m8#<CR> No
Write Load Lens memory 9 <CR>*lensload=m9#<CR> No
Write Load Lens memory 10 <CR>*lensload=m10#<CR> No
Read Read Lens    memory

status

 <CR>*lensload=?#<CR> No
Write save Lens memory 1 <CR>*lenssave=m1#<CR> No
Write save Lens memory 2 <CR>*lenssave=m2#<CR> No
Write save Lens memory 3 <CR>*lenssave=m3#<CR> No
Write save Lens memory 4 <CR>*lenssave=m4#<CR> No
Write save Lens memory 5 <CR>*lenssave=m5#<CR> No
Write save Lens memory 6 <CR>*lenssave=m6#<CR> No
Write save Lens memory 7 <CR>*lenssave=m7#<CR> No
Write save Lens memory 8 <CR>*lenssave=m8#<CR> No
Write save Lens memory 9 <CR>*lenssave=m9#<CR> No
Write save Lens memory 10 <CR>*lenssave=m10#<CR> No
Write Reset Lens to center <CR>*lensreset=center#<CR> No
 

 

 

 

 

 

 

 

 

Color Calibration

 Write Tint + <CR>*tint=+#<CR> Yes
Write Tint – <CR>*tint=-#<CR> Yes
 

Write

  

Set Tint value

  

<CR>*tint=value#<CR>

  

Yes
Read Get Tint value <CR>*tint=?#<CR> Yes
 

Write

  

Set gamma value

  

<CR>*gamma=value#<CR>

  

Yes
Read Gamma value status <CR>*gamma=?#<CR> Yes
 

Write

 Set HDR Brightness

value

  

<CR>*hdrbri=value#<CR>

  

Yes
Read Get HDR Brightness

value

 <CR>*hdibri=?#<CR> Yes
Write Red Gain + <CR>*RGain=+#<CR> Yes
Write Red Gain – <CR>*RGain=-#<CR> Yes
 

Write

  

Set Red Gain value

  

<CR>*RGain=value#<CR>

  

Yes
Read Get Red Gain value <CR>*RGain=?#<CR> Yes
Write Green Gain + <CR>*GGain=+#<CR> Yes
Write Green Gain – <CR>*GGain=-#<CR> Yes
 

Write

  

Set Green Gain value

  

<CR>*GGain=value#<CR>

  

Yes
Read Get Green Gain value <CR>*GGain=?#<CR> Yes
Write Blue Gain + <CR>*BGain=+#<CR> Yes
Write Blue Gain – <CR>*BGain=-#<CR> Yes
 

Write

  

Set Blue Gain value

  

<CR>*BGain=value#<CR>

  

Yes
Read Get Blue Gain value <CR>*BGain=?#<CR> Yes
Write Red Offset + <CR>*ROffset=+#<CR> Yes
Write Red Offset – <CR>*ROffset=-#<CR> Yes
 

Write

  

Set Red Offset value

  

<CR>*ROffset=value#<CR>

  

Yes
Read Get Red Offset value <CR>*ROffset=?#<CR> Yes
Write Green Offset + <CR>*GOffset=+#<CR> Yes
Write Green Offset – <CR>*GOffset =-#<CR> Yes
 

Write

  

Set Green Offset value

  

<CR>*GOffset=value#<CR>

  

Yes
Read Get Green Offset

value

 <CR>*GOffset=?#<CR> Yes
Write Blue Offset + <CR>*BOffset=+#<CR> Yes
Write Blue Offset – <CR>*BOffset=-#<CR> Yes
 

Write

  

Set Blue Offset value

  

<CR>*BOffset=value#<CR>

  

Yes
Read Get Blue Offset value <CR>*BOffset=?#<CR> Yes
 

Write

  

Primary Color

  

<CR>*primcr=value#<CR>

  

Yes
Read Primary Color Status <CR>*primcr=?#<CR> Yes
Write Hue + <CR>*hue=+#<CR> Yes
Write Hue – <CR>*hue=-#<CR> Yes
 

Write

  

Set Hue value

  

<CR>*hue=value#<CR>

  

Yes
Read Get Hue value <CR>*hue=?#<CR> Yes
Write Saturation + <CR>*saturation=+#<CR> Yes
Write Saturation – <CR>*saturation=-#<CR> Yes
 

Write

  

Set Saturation value

  

<CR>*saturation=value#<CR>

  

Yes
Read Get Saturation value <CR>*saturation=?#<CR> Yes
Write Gain + <CR>*gain=+#<CR> Yes
Write Gain – <CR>*gain=-#<CR> Yes
 

Write

  

Set Gain value

  

<CR>*gain=value#<CR>

  

Yes
Read Get Gain value <CR>*gain=?#<CR> Yes
Write Color Gamut Auto <CR>*cgamut=auto#<CR> No
Write Color Gamut BT.709 <CR>*cgamut=bt.709#<CR> No
Write Color Gamut BT.2020 <CR>*cgamut=bt.2020#<CR> No
Write Color Gamut DCI-P3 <CR>*cgamut=dci-p3#<CR> No
Read Color Gamut Value <CR>*cgamut=?#<CR> No
Write Dynamic Iris ON <CR>*diris=on#<CR> No
Write Dynamic Iris OFF <CR>*diris=off#<CR> No
Read Dynamic Iris status <CR>*diris=?#<CR> No
Write Color Calibration

Save

 <CR>*colorsave#<CR> No
Write Color Calibration pattern display <CR>*colorpattern=value#<CR> No

Note: The above function will be varied from model to model.

FAQ Video

  1. How to use RS232 cable to do volume control and sound control on projector?
    https://youtu.be/P4F26kEv60U
  2. How to use RS232 cable connection to power on & off projector?
    https://youtu.be/faGUvcDBmJE
  3. How to set up RS232 cable connection?
    https://youtu.be/CYJRqyO6K1w
  4.  How to use RS232 command to request fan speed and temperature value?
    https://youtu.be/KBXEd-BCDKQ

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Documents / Resources

BenQ LW855UST, LH856UST Projector RS232 Command Control [pdf] Installation Guide
LW855UST, LH856UST, LW855UST LH856UST Projector RS232 Command Control, LW855UST Projector RS232 Command Control, LH856UST Projector RS232 Command Control, Projector RS232 Command Control, Projector RS232, Projector, RS232, Command Control

References

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