[harpastum]

If you're comfortable with microcontrollers (esp32/arduino), I can definitely recommend Inkplate. I found them when I was making a similar setup for my parents, and they have various sizes up to 10" and up to 6 colors they can display.

You can either just get the module, or buy with a battery and mountable case already attached. I think all of the models are also available via Digikey and Mouser if people don't trust random websites.

https://soldered.com/categories/inkplate/

[xd1936]

Seconded. I matted and framed one InkPlate 10 and hung it on our wall, then wrote a simple "show the next three days from everyone in the family's Google Calendars" image creation script and it's been wonderful.

[pflenker]

I looked into inkplate. I have no experience at all with microcontrollers. How difficult is it to build something like you did?