A once-a-day calendar on a colour E Ink fridge display

PaperColor Calendar

Contribution: Firmware, calendar data path and cradle design
Status: Open-source prototype

M5Stack PaperColor on a steel fridge door showing a green date band and three events — 01On the fridge · actual photo

PaperColor Calendar puts the day's Google Calendar on our fridge. An M5Stack PaperColor wakes itself at 04:00, fetches two weeks of events, draws today in six flat E Ink colours and powers off completely until the next morning. Three buttons walk through the days. There is no sign-in on the device: a small Apps Script on my own account serves the data. A 3D-printed magnetic cradle holds it on the door. It has run daily since late September; the firmware, tests and cradle files are public.

View source Cradle files

A closer look

2 views · From the project