BenQ LW500ST User manual

LW500ST
Projector RS232 Command Control
Installation Guide

2
Table of Contents
Introduction .............................................................................................................................................................................. 3
Wire arrangement...................................................................................................................................................... 3
RS232 pin assignment.............................................................................................................................................. 3
Connections and communication settings....................................................................................................... 4
RS232 serial port with a crossover cable....................................................................................................4
Settings..................................................................................................................................................................... 4
RS232 via LAN...................................................................................................................................................................7
Settings......................................................................................................................................................................7
RS232 via HDBaseT ..................................................................................................................................................... 8
Settings..................................................................................................................................................................... 8
Command table...................................................................................................................................................................10
FAQ Video.................................................................................................................................................................................20

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

4
Connections and communication settings
Choose one of the connections and set up properly before RS232 control.
RS232 serial port with a crossover cable
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.
PC or laptop
Communication cable (crossover)
D-Sub 9 pin (female)
D-Sub 9 pin (male) on a projector

5
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.

6
3. Finish Serial port setup.
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

7
RS232 via LAN
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.
PC or laptop
RJ45 port on a projector
LAN cable

8
RS232 via HDBaseT
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.
PC or laptop
HDBaseT compatible device
D-Sub 9 pin
RJ45
RJ45 port on a projector
LAN cable
D-Sub 9 pin

9
3. Finish Serial port setup.
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

10
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>
NO
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
Write
Wireless Display
<CR>*sour=wireless#<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

11
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>
NO
Write
Mic. Volume -
<CR>*micvol=-#<CR>
NO
Read
Mic. Volume Status
<CR>*micvol=?#<CR>
NO
Audio source select
Write
Audio pass Through
off
<CR>*audiosour=off#<CR>
YES
Write
Audio-Computer1
<CR>*audiosour=RGB#<CR>
NO
Write
Audio-Computer2
<CR>*audiosour=RGB2#<CR>
NO
Write
Audio-Video/S-Vide
o
<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
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
<CR>*appmod=cine#<CR>
NO
Write
Standard/Vivid
<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
<CR>*appmod=dci-p3#<CR>
NO
Write
Vivid
<CR>*appmod=vivid#<CR>
NO
Write
Infographic
<CR>*appmod=infographic#<CR>
NO
Write
Sport
<CR>*appmod=sport#<CR>
NO
Write
Spreadsheet
<CR>*appmod= spreadsheet
#<CR>
NO
Write
Bright Room
<CR>*appmod=brightroom#<CR>
NO

12
Write
Golf
<CR>*appmod=golf#<CR>
YES
Write
Video
<CR>*appmod=video#<CR>
YES
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
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=value#<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=value#<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=value#<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=value#<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=value#<CR>
NO
Read
Flesh Tone value
<CR>*fleshtone=?#<CR>
NO
Write
Color
Temperature-Warm
er
<CR>*ct=warmer#<CR>
NO
Write
Color
Temperature-Warm
<CR>*ct=warm#<CR>
YES
Write
Color
Temperature-Norma
l
<CR>*ct=normal#<CR>
YES
Write
Color
<CR>*ct=cool#<CR>
YES

13
Temperature-Cool
Write
Color
Temperature-Cooler
<CR>*ct=cooler#<CR>
NO
Write
Color
Temperature-lamp
native
<CR>*ct=native#<CR>
YES
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 2.4:1
<CR>*asp=2.4:1#<CR>
NO
Write
Aspect Auto
<CR>*asp=AUTO#<CR>
YES
Write
Aspect Real
<CR>*asp=REAL#<CR>
YES
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
Read
Aspect Status
<CR>*asp=?#<CR>
YES
Write
Vertical Keystone +
<CR>*vkeystone=+#<CR>
YES
Write
Vertical Keystone -
<CR>*vkeystone=-#<CR>
YES
Read
Vertical Keystone
value
<CR>*vkeystone=?#<CR>
YES
Write
Horizontal Keystone
+
<CR>*hkeystone=+#<CR>
YES
Write
Horizontal Keystone -
<CR>*hkeystone=-#<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

14
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
Decrease
<CR>*cornerfitbly=-#<CR>
YES
Write
4 Corners
<CR>*cornerfitbly=+#<CR>
YES

15
Bottom-Left-Y
Increase
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 on
<CR>*BC=on#<CR>
NO
Write
Brilliant color off
<CR>*BC=off#<CR>
NO
Read
Brilliant color status
<CR>*BC=?#<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

16
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>
NO
Write
Signal Power On-off
<CR>*autopower=off#<CR>
NO
Read
Signal Power
On-Status
<CR>*autopower=?#<CR>
NO
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

17
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
<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>
YES
Write
SmartEco mode 2
<CR>*lampm= seco2#<CR>
NO
Write
SmartEco mode 3
<CR>*lampm= seco3#<CR>
NO
Write
LampSave+ mode
<CR>*lampm= lampsave+#<CR>
NO
Write
Dimming mode
<CR>*lampm=dimming#<CR>
NO
Write
Custom mode
<CR>*lampm=custom#<CR>
NO
Write
Light level for custom
mode
<CR>*lampcustom=value#<CR>
NO
Read
Light level status for
custom mode
<CR>*lampcustom=?#<CR>
NO

18
Write(雙
燈)
Dual Brightest
<CR>* lampm =dualbr#<CR>
NO
Write(雙
燈)
Dual Reliable
<CR>* lampm =dualre#<CR>
NO
Write(雙
燈)
Single Alternative
<CR>* lampm =single#<CR>
NO
Write(雙
燈)
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
Lan F/W Version
<CR>*lanfwversion=?#<CR>
NO
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

19
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

20
Write
Broadcasting off
<CR>*broadcasting=off#<CR>
NO
Read
Broadcasting Status
<CR>*broadcasting=?<CR>
NO
Write
AMX Device
Discovery-on
<CR>*amxdd=on#<CR>
NO
Write
AMX Device
Discovery-off
<CR>*amxdd=off#<CR>
NO
Read
AMX Device
Discovery Status
<CR>*amxdd=?#<CR>
NO
Read
Mac Address
<CR>*macaddr=?#<CR>
NO
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
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