JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

2026-09-06T07:57:42Z

Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

Neue Seite

__NOINDEX__
'''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 Waveshare WSAL24603 is a round 4-inch DSI display with an IPS panel, 720 × 720 resolution, and 10-point capacitive touch. It is driven directly via the DSI interface of a Raspberry Pi.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL24603 WSAL24603 – 4inch DSI Round Touch Display, 720 × 720, IPS, 10-Point Touch]

== Technical overview ==
* Resolution: 720 × 720 pixels on a round 4-inch IPS panel.
* Connection: A 15-pin FPC cable links the display to the Raspberry Pi's DSI interface; 5 V power and I²C are connected via a 4-pin header.
* Compatibility: Supports Raspberry Pi 5/CM4/CM3+/CM3 as well as Pi 4B/3B+/3B/3A+.
* Operating systems: Works with Trixie, Bookworm, Bullseye, and Buster.
* Trixie/Bookworm configuration: Add dtoverlay=vc4-kms-dsi-waveshare-panel,4_0_inchC under [all] in config.txt; the DSI1 interface is used by default.
* Manual driver installation for Bullseye/Buster: Clone the Waveshare-DSI-LCD repository from GitHub, select the correct kernel and architecture subdirectory, then run sudo bash ./WS_xinchDSI_MAIN.sh 40C I2C0.
* Backlight adjustment: Via the GUI (Control Center → Screens → DSI-2 → Brightness) or through the terminal command echo X | sudo tee /sys/class/backlight/*/brightness, where X ranges from 0 (darkest) to 255 (brightest).
* Screen rotation: In Trixie/Bookworm via Control Center → Screen → Orientation; in older systems via corresponding config.txt entries.
* Disable touch: Add disable_touchscreen=1 to the end of config.txt and reboot the device.
* Always confirm the exact model before configuring; incorrect settings can cause black screens or missing displays.

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
dtoverlay=vc4-kms-dsi-waveshare-panel,4_0_inchC
git clone https://github.com/waveshare/Waveshare-DSI-LCD
sudo bash ./WS_xinchDSI_MAIN.sh 40C I2C0
echo 100 | sudo tee /sys/class/backlight/*/brightness
disable_touchscreen=1
</syntaxhighlight>

== Notes and version constraints ==
* Always confirm the exact product model before configuration; this guide applies only to the 4inch DSI LCD (C), not other 4-inch DSI models such as 4-DSI-TOUCH-C.
* The manual driver installation steps require a stable internet connection.
* If you change the motherboard (e.g., from Pi 4 to Pi 3), the driver must be reinstalled because different driver files need to be loaded.
* Backlight and rotation steps are version-sensitive; the exact menu paths differ depending on the operating system (Trixie vs. Bookworm vs. older versions).
* The wlr-randr and xset dpms commands apply only to specific graphical interfaces (Wayland or X11 respectively); verify your environment before using them.

== Source and revision record ==
* [https://www.waveshare.com/wiki/4inch_DSI_LCD_(C) 4inch DSI LCD (C) - Waveshare Wiki]
* Source revision: 111126
* Captured: 2026-09-05T02:34:30+00:00
* SHA-256: <code>4a2c3cd6fa568ec3360ba5996d262cdab4ed36f53be27a80a13931ea0f73fedd</code>

WSAL24603 – 4inch DSI LCD (C)/en - Versionsgeschichte

JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex