4.3inch DSI LCD
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Introduction
4.3inch Capacitive Touch Display for Raspberry Pi, 800 × 480, IPS Wide Angle, MIPI DSI Interface.
Features
- 4.3inch IPS screen, 800 x 480 hardware resolution.
- Capacitive touch panel, support 5-point touch.
- Supports Pi 4B/3B+/3A+/3B/2B/B+/A+, another adapter board is required for CM3/3+/4.
- Tempered glass capacitive touch panel, hardness up to 6H.
- DSI interface, refresh rate up to 60Hz.
- When used with Raspberry Pi, supports Raspberry Pi OS / Ubuntu / Kali and Retropie, driver free.
- Supports software control of backlight brightness.
Work with RPI
Hardware connection
- Connect the DSI interface of 4.3inch DSI LCD to the DSI interface of Raspberry Pi.
- For easy use, you can fix the Raspberry Pi on the backside of the 4.3inch DSI LCD by screws
Software setting
Supports Raspberry Pi OS / Ubuntu / Kali and Retropie systems for Raspberry Pi.
1) Download the image from the Raspberry Pi website.
2) Download the compressed file to the PC, and unzip it to get the .img file.
3) Connect the TF card to the PC, and use SDFormatter software to format the TF card.
4) Open the Win32DiskImager software, select the system image downloaded in step 2, and click ‘Write’ to write the system image.
5) After the programming is completed, open the config.txt file in the root directory of the TF card, add the following code at the end of config.txt, save and eject the TF card safely.
dtoverlay=vc4-kms-v3d dtoverlay=vc4-kms-dsi-7inch
6) Power on the Raspberry Pi and wait for a few seconds until the LCD displays normally. And the touch function can also work after the system starts.
Backlight Controlling
- Open a terminal and type the following command to adjust the brightness.
Note: If the command reports the 'Permission denied' error, please switch to the 'root' user mode and execute it again.
echo X > /sys/class/backlight/rpi_backlight/brightness
- X can be value in range 0~255. The backlight is darkest if you set it to 0 and the backlight is set to lightest if you set it to 255
echo 100 > /sys/class/backlight/rpi_backlight/brightness echo 0 > /sys/class/backlight/rpi_backlight/brightness echo 255 > /sys/class/backlight/rpi_backlight/brightness
- We also provide a example for brightness adjusting, you can download and install it by following commands:
wget https://www.waveshare.net/w/upload/3/39/Brightness.tar.gz tar -xzf Brightness.tar.gz cd brightness ./install.sh
- After connecting, you can choose Menu -> Accessories -> Brightness to open the adjustment software
Note: If you use the 2021-10-30-raspios-bullseye-armhf image or the laster version, please add the line dtoverlay=rpi-backlight to the config.txt file and reboot.
Sleep
Run the following commands on the Raspberry Pi terminal, and the screen will enter sleep mode:
xset dpms force off
Disable touch
At the end of the config.txt file, add the following commands corresponding to disabling touch (the config file is located in the root directory of the TF card, and can also be accessed through the command: sudo nano /boot/config.txt):
sudo apt-get install matchbox-keyboard
Note: After adding the command, it needs to be restarted to take effect.
FAQ
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- The normal working current of raspberry PI 4B alone with 5V power supply is 450mA-500mA；
- Using 5V power supply raspberry PI 4B+4.3inch DSI LCD maximum brightness normal operating current is 700mA-750mA；
- Using 5V power supply raspberry PI 4B+4.3inch DSI LCD minimum brightness normal operating current is 550mA-580mA；
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You need to remove the resistor and wire the top pad to P1 of Raspberry Pi and control it by PWM.
gpio -g pwm 18 0 gpio -g mode 18 pwm gpio pwmc 1000 gpio -g pwm 18 X（X is in range 0~1024, 0: Darkest, 1024: brightest）
PS: In order to ensure a good customer experience, the default factory minimum brightness is the visible state. If you need to completely turn off the backlight to achieve a black screen effect, please manually change the 100K resistor in the picture below to a 68K resistor.
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Use xset dpms force off and xset dpms force on commands to control screen sleep and wake up
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Anti-Piracy
Since the first-generation Raspberry Pi released, Waveshare has been working on designing, developing, and producing various fantastic touch LCDs for the Pi. Unfortunately, there are quite a few pirated/knock-off products in the market. They're usually some poor copies of our early hardware revisions, and comes with none support service.
To avoid becoming a victim of pirated products, please pay attention to the following features when purchasing:
Beware of knock-offs
Please note that we've found some poor copies of this item in the market. They are usually made of inferior materials and shipped without any testing.
You might be wondering if the one you're watching or you've purchased in other non-official stores is original, feel free to contact us.