If you want a WiFi „Post-it“ ePaper this is your thing. For about 15 u$ in Aliexpress this small eink boards with ESP32 included are an absolute beauty. The even have a mini speaker and amplifier inside.
https://www.thingiverse.com/thing:4209788 Download and print
T5 Case and project has been sponsored by www.digitspace.com electronic parts store
Please note that we are also offering to print T5S board housings for free if you register in CALE.es
CALE project has been sponsored by makers store digitspace.com