paperd.ink is a 4.2" e-paper display coupled with an ESP32 microcontroller. It's open-source, fully hackable and all the PCB and 3D printing files are available on our Github repo. It’s low power so you can run it for a month on a single charge. Update wirelessly using WiFi, Bluetooth. Display your calendar, to-do list, weather, custom images, whatever you want. Code using micropython, Arduino, or ESP-IDF.

It was too hard to launch a hardware product on a shoestring budget dealing with way too many issues amidst the pandemic. But thanks to the HN community, we got a great response last year on our prototype which gave us confidence to move forward!