this post was submitted on 25 May 2026
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I got the waveshare color e-ink ( https://www.aliexpress.us/item/3256810087715380.html ) to make a custom dashboard display - it is the living embodiment of horrible refresh behavior - no clock on that dashboard. Still, while it's static it looks really good, you just have to figure out what you want to see on a changeable display that doesn't change more than a couple of times per hour.
Oh yeah those E-inks have like a 10 second refresh timem they are meant for static art, images, signage, etc...
That is why for clocks and dashboards, I think RLCDs like the https://www.waveshare.com/esp32-s3-rlcd-4.2.htm which is an older tech, but nowadays much better reflection to be closer to e-paper, 60Hz and none of the epaper downsides, but much higher power use.
Yeah, I've got mine showing current temperature, forecast and our Google calendar, so it probably refreshes 40-50x per day. The bigger power draw is firing up the WiFi module to check for new information once every 5 minutes. Last battery charge ran about 2 weeks.