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Show HN: I made my own TRMNL e-ink device
time ago, my friend George linked me to TRMNL, a new battery-powered e-ink display with an associated service that generates the images that the display will actually show. It looks really well-made, and I have an irrational attraction to e-ink displays, so naturally I had to pre-order one.
They use a Raspberry Pi (usually a Zero W), making the project pretty generic, as you can show advanced graphics or fetch files from remote servers, but that’s not very convenient because you now need to maintain a whole Linux device on your network. In the future, I might connect a LiPo battery and a charging circuit to the driver, at which point I’ll figure out how to read the voltage so the former can report the latter to the server, but for now that won’t be necessary. I thought, however, that if I could get the firmware to run on the generic, $20 Waveshare driver, that would be a great addition to the ecosystem, and it would make TRMNL more money, since you have to buy their $50 BYOD license to connect custom devices to their servers, so it’s a win-win.
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