WSAL12030 – 4inch HDMI LCD/en

Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

The 4-inch display with a 480×800 IPS panel and resistive touch connects directly to a Raspberry Pi via the GPIO header. It supports Raspberry Pi OS, Ubuntu, Kali, and Retropie and can also be used as a simple monitor.

Related products at JW Tech

WSAL12030 – 4inch Resistive Touch Screen LCD, 480×800, HDMI, IPS, Low Power

Technical overview

IPS panel with a resolution of 480 × 800
Resistive touch operation
Compatible with all Raspberry Pi generations; for Pi Zero / Zero 2 W an additional HDMI cable is required
Supports Raspberry Pi OS, Ubuntu, Kali, and Retropie systems
Can be used as a plain monitor without the touch function
Backlight switchable via a switch on the back of the display
Operating range: 0 °C to 70 °C
Mounting hole size M3
No I/O resources are used when only the display is used; I/Os are required for the touch function

Commands and examples – verify before use:

hdmi_group=2
hdmi_mode=87
hdmi_timings=480 0 40 10 80 800 0 13 3 32 0 0 0 60 0 32000000 3
hdmi_drive=1
hdmi_force_hotplug=1
dtoverlay=waveshare-ads7846,penirq=25,xmin=150,xmax=3900,ymin=100,ymax=3950,speed=50000
sudo apt-get install evtest
sudo evtest
sudo nano /boot/firmware/config.txt
dtoverlay=waveshare-ads7846,x_min=164,x_max=4010,y_min=154,y_max=3758
sudo reboot
sudo nano /boot/firmware/cmdline.txt
video=HDMI-A-1:400x1280M@60,rotate=90
rotate=90
rotate=180
rotate=270
sudo nano .config/wayfire.ini
[output:HDMI-A-1]
mode = 800x480@60
transform = 270

Notes and version constraints

The exact values for x_min, x_max, y_min, and y_max must be measured per device using evtest; the numbers given in the wiki are examples
Screen rotation commands depend on the OS in use (Bookworm, Bullseye/Kali, Ubuntu); verify the correct variant before applying it
The parameter X in “gpio -g pwm 18 X” must be between 0 and 1024; which direction (bright/dark) applies in your setup should be confirmed manually
The SDFormatter and Win32DiskImager instructions assume a Windows PC environment; other tools may work
Missing information regarding warranty, certifications, or prices – no data available

Source and revision record

4inch HDMI LCD - Waveshare Wiki
Source revision: 106242
Captured: 2026-08-30T03:12:03+00:00
SHA-256: ece2208eab5dc8014c84d56f1d5d83aef7c9b621f80ed4a04dcc1719e497ae61