BenQ LW730 User manual

LW730/ LH730
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..............................................................................................................................................................6
Settings ..............................................................................................................................................................6
RS232 via HDBaseT.....................................................................................................................................................6
Settings ..............................................................................................................................................................6
Command table............................................................................................................................... 8
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.
1. Determine the COM Port name used for the RS232 communications in Device Manager.
PC or laptop
Communication cable
(crossover)
D-Sub 9 pin
(female)
D-Sub 9 pin (male) on a
projector

5
2. Choose Serial and the corresponding COM port as the communication port. In this
given example, COM6 is selected.
3. Finish Serial port setup.
Baud rate
9600 / 14400 / 19200 / 38400 / 57600 / 115200 bps
Check the baud rate of the connected projector from its OSD
menu.
Data length
8 bit
Parity check
None
Stop bit
1 bit
Flow control
None

6
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.
RS232 via HDBaseT
Settings
1. Determine the COM Port name used for the RS232 communications in Device
Manager.
PC or laptop
RJ45 port on a projector
LAN cable
PC or laptop
HDBaseT compatible device
D-Sub 9 pin
RJ45
RJ45 port on a projector
LAN cable
D-Sub 9 pin

7
2. Choose Serial and the corresponding COM port as the communication port. In this
given example, COM6 is selected.
3. Finish Serial port setup.
Baud rate
9600 / 14400 / 19200 / 38400 / 57600 / 115200 bps
Check the baud rate of the connected projector from its OSD
menu.
Data length
8 bit
Parity check
None
Stop bit
1 bit
Flow control
None

8
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#<C
R>
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

9
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>
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#<C
R>
NO
Write
Audio-Computer2
<CR>*audiosour=RGB2#<
CR>
NO
Write
Audio-Video/S-Vid
eo
<CR>*audiosour=vid#<CR
>
NO
Write
Audio-Component
<CR>*audiosour=ypbr#<C
R>
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
>
NO
Write
Bright
<CR>*appmod=bright#<C
R>
YES
Write
Living Room
<CR>*appmod=livingroo
m#<CR>
NO
Write
Game
<CR>*appmod=game#<C
NO

10
R>
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=infographi
c#<CR>
YES
Write
Sport
<CR>*appmod=sport#<C
R>
NO
Write
User1
<CR>*appmod=user1#<CR
>
YES
Write
User2
<CR>*appmod=user2#<C
R>
YES
Write
User3
<CR>*appmod=user3#<C
R>
NO
Write
ISF Day
<CR>*appmod=isfday#<C
R>
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

11
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>
NO
Write
Color -
<CR>*color=-#<CR>
NO
Write
Set Color value
<CR>*color=value#<CR>
NO
Read
Color value
<CR>*color=?#<CR>
NO
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#<C
R>
NO
Read
Flesh Tone value
<CR>*fleshtone=?#<CR>
NO
Write
Color
Temperature-War
mer
<CR>*ct=warmer#<CR>
NO
Write
Color
Temperature-War
m
<CR>*ct=warm#<CR>
YES
Write
Color
Temperature-Norm
al
<CR>*ct=normal#<CR>
YES
Write
Color
Temperature-Cool
<CR>*ct=cool#<CR>
YES
Write
Color
Temperature-Cool
er
<CR>*ct=cooler#<CR>
NO
Write
Color
Temperature-lamp
native
<CR>*ct=native#<CR>
NO
Read
Color Temperature
Status
<CR>*ct=?#<CR>
YES

12
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>
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
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
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

13
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
Bottom-Left-Y
Increase
<CR>*cornerfitbly=+#<CR
>
YES

14
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>
NO
Write
Digital Zoom out
<CR>*zoomO#<CR>
NO
Write
Auto
<CR>*auto#<CR>
NO
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
<CR>*pp=FC#<CR>
YES

15
Ceiling
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=cent
er#<CR>
YES
Write
Menu Position -
Top-Left
<CR>*menuposition=tl#<
CR>
YES
Write
Menu Position -
Top-Right
<CR>*menuposition=tr#<
CR>
YES
Write
Menu Position -
Bottom-Right
<CR>*menuposition=br#<
CR>
YES
Write
Menu Position -
Bottom-Left
<CR>*menuposition=bl#<
CR>
YES
Read
Menu Position
Status
<CR>*menuposition=?#<C
R>
YES
Write
Direct Power On-on
<CR>*directpower=on#<C
R>
YES
Write
Direct Power On-off
<CR>*directpower=off#<C
R>
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#<C
R>
NO

16
Write
Standby
Settings-Network
off
<CR>*standbynet=off#<C
R>
NO
Read
Standby
Settings-Network
Status
<CR>*standbynet=?#<CR>
NO
Write
Standby
Settings-Microphon
e on
<CR>*standbymic=on#<C
R>
NO
Write
Standby
Settings-Microphon
e off
<CR>*standbymic=off#<C
R>
NO
Read
Standby
Settings-Microphon
e Status
<CR>*standbymic=?#<CR
>
NO
Write
Standby
Settings-Monitor
Out on
<CR>*standbymnt=on#<C
R>
NO
Write
Standby
Settings-Monitor
Out off
<CR>*standbymnt=off#<C
R>
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

17
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#<C
R>
YES
Write
Light level for
custom mode
<CR>*lampcustom=value
#<CR>
NO
Read
Light level status for
custom mode
<CR>*lampcustom=?#<C
R>
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
>
YES
Read
MCU F/W Version
<CR>*mcufwversion=?#<
CR>
YES
Read
Ballast F/W Version
<CR>*ballastfwversion=?#
<CR>
YES
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>
NO
Write
Freeze Off
<CR>*freeze=off#<CR>
NO
Read
Freeze Status
<CR>*freeze=?#<CR>
NO
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

18
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
<CR>*rr=?#<CR>
NO

19
Status
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>
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#<C
R>
YES
Write
High Altitude mode
off
<CR>*Highaltitude=off#<C
R>
YES
Read
High Altitude mode
status
<CR>*Highaltitude=?#<CR
>
YES

20
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