Wireless ePaper Calendar

With very good visibility and extremely low power usage, though with a low refresh rate and limited color palette, ePaper displays are something of a niche product. While you wouldn’t want to watch video on one, they make ideal platforms for slowly changing information like prices or calendar events. As seen here, Paul-Vincent Roll created a fantastic calendar platform based around the ESP32-powered Inkplate 6 ePaper display.

Roll’s display gets calendar data wirelessly from Home Assistant (or ESPHome), which itself gets this data from the cloud. The display automatically shows as many events as will fit on the screen, along with a date and month display for quick reference. Along with your personal calendar data, it can display a notable quote on the bottom of the screen, pulled from api.quotable.io.

The device has a 3D-printed stand, which nicely integrates its rechargeable battery. The system is optimized for low power consumption so that it does not need to be charged often. However, the Inkplate 6 display features its own battery management circuitry and a USB-C connector, so the process should be relatively painless when needed. Roll used a 4200mAh battery in his display, which should be sufficient for some time.

Overall it’s a very pleasant and uncluttered build, which would fit in nicely in a variety of situations. Setup code for both Home Assistant and ESPHome is on GitHub. Print files for the enclosure are available on Printables, and model files are even included for examination or modification.