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2026-09-05T22:24:41Z

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 9.7inch e-Paper HAT with IT8951 controller: specifications, Raspberry Pi and STM32 integration, and safe-handling notes.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL14448 WSAL14448 – 1200x825, 9.7inch E-Ink raw display]
* [https://shop.jw-tech.eu/p/WSAL15195 WSAL15195 – 1200x825, 9.7inch E-Ink display HAT for Raspberry Pi]

== Technical overview ==
* Resolution 1200 × 825 pixels on a 9.7-inch diagonal
* Operating voltage 5 V; interfaces USB/SPI/I80/I2C
* Viewing angle greater than 170°; operating temperature 0–50 °C
* Full refresh under 1 s; typical refresh power draw 0.6 W
* No backlight required; last displayed content persists after power-off
* Connects to the Raspberry Pi 40-pin GPIO header via SPI
* For Raspberry Pi: enable SPI, install libraries, compile demo code
* For STM32: choose SPI or I80 depending on pin availability
* FPC is fragile – reinforcing it with tape during development is recommended
* Connect all cables before applying power

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
sudo raspi-config
sudo nano /boot/config.txt
sudo make clean && sudo make -j4
make -j4 LIB=LGPIO
make -j4 LIB=GPIOD
sudo ./epd -1.50 0
</syntaxhighlight>

== Notes and version constraints ==
* The device does not support hot-plug; verify all connections before powering on
* The FPC is fragile; additional reinforcement is recommended
* Developing over USB on Windows requires an NDA with the Waveshare team; currently unavailable for individual users
* Displaying the same image for extended periods can cause irreversible burn-in; refresh at least every 24 hours
* Direct sunlight dries out the charged particles – this damage is irreversible
* After deep-sleep mode, the software must re-initialize the display
* The VCOM value printed on the FPC must be passed as a parameter

== Source and revision record ==
* [https://www.waveshare.com/wiki/9.7inch_e-Paper_HAT 9.7inch e-Paper HAT - Waveshare Wiki]
* Source revision: 110089
* Captured: 2026-08-30T04:18:48+00:00
* SHA-256: <code>8c3b746c5e01759f73902dc32db52bec558cec63b59c05b496d97cdca5547711</code>

WSAL14448 – 9.7inch e-Paper HAT/en - Versionsgeschichte

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