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2026-09-05T22:26:20Z

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 guide for the Waveshare 2.23inch OLED HAT with an SSD1305 controller: SPI/I2C interfaces, pinout, enabling interfaces on Raspberry Pi and demo runtimes (BCM2835, WiringPi, lgpio, Python), plus Arduino wiring.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL17009 WSAL17009 – 128×32, 2.23inch OLED display HAT for Raspberry Pi]

== Technical overview ==
* Display: 128×32 pixels, 2.23 inch, white monochrome OLED; SSD1305 controller (internal GDDRAM 132×64).
* SPI is the default mode; soldering jumpers (BS1/BS2/DIN/CLK/CS/DC) switches to I2C.
* Operating voltage 3.3 V; temperature range −40 to 70 °C.
* Pinout: VCC (3.3 V/5 V), GND, DIN (data), CLK (clock), CS (chip select, active-low), DC (register/data selection in SPI), RST (reset, active-low).
* Raspberry Pi: enable SPI via `raspi-config` → Interfacing Options → SPI, then reboot; `dtparam=spi=on` appears in `/boot/config.txt`.
* Raspberry Pi: enable I2C analogously via `raspi-config` → Interfacing Options → I2C, then reboot.
* Libraries: BCM2835 (compile from source), WiringPi (`apt-get install wiringpi` or .deb or Git build), lgpio (Git + make install), Python (spidev, smbus, python3-pil, python3-numpy).
* Download and extract the demo code package, then compile/run per runtime (make / sudo ./oled, or python3 stats.py).
* Arduino: UNO PLUS as reference board; I2C: DIN→SDA(D14), SCL→D15; SPI: DIN→MOSI(D11), CLK→SCK(D13), CS→D10, DC→D8, RST→D9.
* Image generation: Image2Lcd with data type *c, horizontal scan, monochrome, max size 128×32.

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
sudo raspi-config
sudo reboot
ls /dev/spi*
sudo wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.71.tar.gz
sudo tar zxvf bcm2835-1.71.tar.gz
cd bcm2835-1.71/
sudo ./configure && sudo make && sudo make check && sudo make install
sudo apt-get install wiringpi
wget https://files.waveshare.com/wiki/common/wiringpi-latest.deb
sudo dpkg -i wiringpi-latest.deb
gpio -v
sudo git clone https://github.com/WiringPi/WiringPi
cd WiringPi
sudo ./build
sudo su
wget https://github.com/joan2937/lg/archive/master.zip
unzip master.zip
cd lg-master
sudo make install
sudo apt-get update
</syntaxhighlight>

== Notes and version constraints ==
* Version-sensitive: On Bookworm only the lgpio library is available; bcm2835 and wiringPi cannot be installed or used there.
* Conflict warning: If the BCM2835 library is loaded first, the WiringPi and Python demos fail; a system reboot is required.
* The exact jumper configuration for I2C must be verified before use; the source only shows a figure without a complete pin-mapping table.
* The demo URLs (files.waveshare.com) are external links; availability is not guaranteed.
* No warranty, certification, or safety-test information is present in the source – do not infer any.
* The Arduino wiring uses D8–D15; other boards require adapted pin mappings.

== Source and revision record ==
* [https://www.waveshare.com/wiki/2.23inch_OLED_HAT 2.23inch OLED HAT - Waveshare Wiki]
* Source revision: 76299
* Captured: 2026-08-31T03:58:10+00:00
* SHA-256: <code>f7261d2710adf6a510510fe7a8cb9091ecd58c25fdd63ec3cb4bc35904373768</code>

WSAL17009 – 2.23inch OLED HAT/en - Versionsgeschichte

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