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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 7.8inch e-Paper HAT with IT8951 driver: 1872×1404 resolution, connection to Raspberry Pi via SPI/USB/I80, and safe-use notes.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL16711 WSAL16711 – 1872×1404, 7.8inch E-Ink raw display]
* [https://shop.jw-tech.eu/p/WSAL16766 WSAL16766 – 1872×1404, 7.8inch E-Ink display HAT for Raspberry Pi]

== Technical overview ==
* Resolution: 1872 × 1404 pixels; display area approx. 158.2 mm × 118.6 mm
* Driver: embedded IT8951 controller on the HAT
* Interfaces: USB, SPI, and I80 for connecting to host boards such as Raspberry Pi or Nucleo
* Operating voltage: 5 V
* Color palette: black and white; grayscale from 2 to 16 levels (1–4 bit)
* Full refresh takes approximately 450 ms (typical)
* Refresh power typical 1.2 W; standby power typical 0.1 W
* Viewing angle >170°
* Operating temperature 0–50 °C; storage temperature -25–70 °C

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
sudo raspi-config # Interfacing Options -> P4 -> SPI -> Yes
sudo nano /boot/config.txt # add dtoverlay=spi0-0cs if using lg/gpiod
sudo reboot
wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.60.tar.gz && tar zxvf bcm2835-1.60.tar.gz && cd bcm2835-1.60 && ./configure && make && sudo make check && sudo make install
wget https://github.com/joan2937/lg/archive/master.zip && unzip master.zip && cd lg-master && make && sudo make install
sudo apt-get update && sudo apt install gpiod libgpiod-dev
sudo wget https://files.waveshare.com/upload/8/80/IT8951_20200319_Release.7z && 7z x IT8951_20200319_Release.7z -O./IT8951 && cd IT8951/ && sudo make clean && sudo make -j4
git clone https://github.com/waveshare/IT8951-ePaper.git && cd IT8951-ePaper/Raspberry && sudo make clean && sudo make -j4
sudo ./epd -1.50 0
</syntaxhighlight>

== Notes and version constraints ==
* The glass panel and FPC connector are fragile; when developing, reinforce the FPC with tape
* All cables must be connected before powering on – the device does not support hot-plugging
* Two versions exist: raw panel (requires separate IT8951 driver board) and HAT version (with driver board); the HAT version is recommended for first-time users
* Refresh time and power figures are measured values that may vary with environment
* In low-temperature environments, color cast may occur; allow 6 hours at 25 °C before refreshing
* Avoid direct sunlight; take UV protection measures because charged particles can dry out under strong light (irreversible)
* Update the display at least every 24 hours to avoid burn-in
* After prolonged high-voltage states, set the screen to sleep mode or power off after each refresh to prevent burn-out
* E-LINK-TCON-DEMO source code requires signing an NDA with the Waveshare team and is currently unavailable to individual users

== Source and revision record ==
* [https://www.waveshare.com/wiki/7.8inch_e-Paper_HAT 7.8inch e-Paper HAT - Waveshare Wiki]
* Source revision: 110090
* Captured: 2026-08-31T03:48:29+00:00
* SHA-256: <code>f310d20467ea9a285bf0332094902cbb0c08e4781c53937e5f6265b2a3c04538</code>

WSAL16711 – 7.8inch e-Paper HAT/en - Versionsgeschichte

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