• E-ink display https://www.waveshare.com/7.5inch-e-paper-c.htm
• ESP32 with driver board for e-ink included https://www.waveshare.com/wiki/E-Paper_ESP32_Driver_Board
• Battery shield https://nl.aliexpress.com/item/4001242992784.html?spm=a2g0s.9042311.0.0.6f614c4dNXKuKb
• Ikea frame https://www.ikea.com/nl/nl/p/ribba-fotolijst-zwart-50378448/
• Any 18650 battery

• Add https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json in "Additional Boards Managers URLs" in preferences.
• Install esp32 in boards manager.
• Copy the esp32-waveshare-epd folder to your sketchbook location (see preferences).
• In Arduino IDE select DOIT ESP32 DEVKIT v1.
• Baud rate is 115200.
• Code away!

The screenshotter will take a screenshot of any webpage (preferrably in the right resolution, 640x384) and turns it into a binary blob. The ESP32 can technically show any jpeg image, but to reduce powerconsumption I chose to do that on the backend. In essence, this script takes a screenshot and turns it into a binary blob where 8 pixels are grouped into a single byte. A file is generated for the black/white screen and for the yellow/white part of the screen. Both are fetched by the ESP32 and shown on the e-ink.

• Build the screenshotter/ Docker with cd screenshotter/ && make

I personally have a webapp running on my smart meter that generates a special webpage that's small enough. You can find that software here: https://github.com/m1dnight/homedash