GallAfter about a year, I finally wrote a new article. It's about my embedded backpack patch project that uses epaper.
Soon the same article should be in the new issue of Paged Out magazine.
Link: https://lubiak.pages.dev/pixelpin/
In addition, the project is open source.
https://github.com/mikolajlubiak/pixelpin
https://github.com/mikolajlubiak/pixelpin-app
PixelPin | Mikołaj Lubiak
Background Someday I thought that it would be cool to have a pin or a patch on my backpack. Sadly, I didn’t have any… Sooo the next logical step was to make one using E Ink. Hardware For hardware, I chose… whatever I had lying around. That just happened to be an ESP32S3 (way overpowered, later changed for an ESP32C3) and an E Ink display. Code, the microcontroller I decided to choose Bluetooth (BLE) for the communication protocol, since it’s supposed to use little energy.