usefull? links:
- https://github.com/andrei-tatar/imagotag-hack
- https://dmitry.gr/?r=05.Projects&proj=29.%20eInk%20Price%20Tags
- https://jirkabalhar.cz/posts/e-ink-display/hacking-eink-price-tag-writeup.html
- https://hackaday.com/2022/10/28/driving-three-color-e-paper-pricetags-with-an-arduino/
- https://wiki.section77.de/projekte/fricklepaper/einstieg
- https://hackaday.com/2023/02/11/reverse-engineering-e-ink-price-tags/
- https://hackaday.com/2022/06/15/a-handy-breakout-board-for-e-paper-hacking/
- https://github.com/atc1441/E-Paper_Pricetags
- https://github.com/vroland/epdiy
