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2026-09-05T22:25:26Z

Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

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'''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 ==
Technical overview of the Waveshare 2-inch LCD module: IPS panel with ST7789V driver, 240×320 resolution and 4-wire SPI connection. Includes wiring tables for Raspberry Pi, STM32F103 and Arduino UNO plus notes on driver libraries.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL17344 WSAL17344 – 2inch LCD Display Module, IPS Screen, 240×320 Resolution, SPI Interface]

== Technical overview ==
* Resolution 240 (vertical) × 320 (horizontal); demos use the RGB565 color format
* Operating voltage 3.3 V/5 V; supply voltage and logic voltage must match, otherwise the module will not work properly
* SPI signals: DIN/MOSI, CLK/SCLK, CS, DC (DC=0 command, DC=1 data), RST, BL (backlight)
* Raspberry Pi wiring via 8-pin header: VCC→3.3 V, GND→GND, DIN→MOSI (pin 19), CLK→SCLK (pin 23), CS→CE0 (pin 24), DS→pin 22, RST→pin 13, BL→pin 12
* STM32F103RB example: DIN→PA7, CLK→PA5, CS→PB6, DC→PA8, RST→PA9, BL→PC7
* Arduino UNO wiring: DIN→D11, CLK→D13, CS→D10, DC→D7, RST→D8, BL→D9, VCC→5 V
* SPI communication mode: Mode 0 (CPOL=0, CPHA=0) is commonly used; the slave-to-master data line is omitted because only display output is needed
* Available demo environments: BCM2835 library, WiringPi library, lgpio and Python (spidev) for Raspberry Pi; FBCP porting recommended on Bullseye, not compatible with Bookworm
* Maximum power consumption per FAQ: 3.3 V / 46 mA
* Dimensions: display 30.60 mm (H) × 40.80 mm (V), pixel size 0.1275 mm, module housing 58 × 35 mm

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
sudo raspi-config
sudo reboot
sudo make clean && sudo make -j 8
sudo ./main 2
sudo python3 2inch_LCD_test.py
sudo apt-get install python3-pip
sudo apt-get install python3-pil
sudo apt-get install python3-numpy
sudo pip3 install spidev
sudo wget https://files.waveshare.com/upload/8/8d/LCD_Module_RPI_code.zip
sudo unzip ./LCD_Module_RPI_code.zip
</syntaxhighlight>

== Notes and version constraints ==
* The example STM32 pins refer to STM32F103RBT6; when porting to other boards, the actual pin mapping must be adapted.
* BCM2835 and WiringPi are not available on the Bookworm system; only lgpio can be used there.
* FBCP is not compatible with the Bookworm system; Bullseye is recommended.
* Running BCM2835 directly after a WiringPi demo may cause the screen to fail to refresh properly – restarting the Raspberry Pi resolves it.
* The power supply must match the logic voltage; when using Arduino, a 5 V power supply must be connected.
* Exact compatibility with microcontrollers other than those listed (e.g., Pico) is not fully documented in the source; external references were removed.
* Version-dependent steps (Bullseye vs. Bookworm) require human confirmation before execution.

== Source and revision record ==
* [https://www.waveshare.com/wiki/2inch_LCD_Module 2inch LCD Module - Waveshare Wiki]
* Source revision: 110700
* Captured: 2026-08-31T04:15:07+00:00
* SHA-256: <code>a727642dc72ad5a6b3fb1360faa4c514cb37f40ca09397d5c4ba59fb16820f9b</code>

WSAL17344 – 2inch LCD Module/en - Versionsgeschichte

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