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E-ink calendar integrating google calendar og OWM onto a 7.5 inch Waveshare screen based on an ESP32 LOLIN32 board

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eink-family-calendar-esp32

E-ink calendar integrating google calendar og OWM onto a 7.5 inch Waveshare screen based on an ESP32 LOLIN32 board

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For many years I have been playing with the idea of breaking the barrier between physical and digital calendars - more specifically creating a nice looking e-ink calendar that can hang in our living room/kitchen. Now the idea has materialized in a very satisfying way, and I would love to share how I made it come true.

The calendar displays the first 9 events for all selected google calendars for a specific user. In my case I have selected that of my wife, myself and our shared family calendar. Besides the calendar, I have created a mini-weather display in the corner, showing an icon from OpenWeather Maps, as well as temperature and windspeed.

The project combine a 7.5 Waveshare e-ink screen, with an ESP32 microcontroller and a LIPO battery. It is packaged in 13x18 IKEA Ribba frame. Besides Arduino code for the microcontroller, I also had to create a google script to extract the calendar entries from google.

Credits to the ESP32 E-Ink Weather Station project on Github, from which I have learned a lot when coding the project.

Components:

  • Waveshare 7.5 inch E-ink Screen (800x600 version) ~76 EUR on Amazon.de (linked to the yellow C version, as I could not find the red anymore)
  • LOLIN32 ESP32 ~8-9 USD on Aliexpress (I used an older version, but get the D32 or D32 Pro as it has integrated battery gauge on pin 35)
  • LIPO battery with 1800 mAH ~13 EUR on Amazon.de
  • IKEA Ribba 13x18 frame ~3 EUR in IKEA

Total cost: ~100 EUR

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Pin-setup:

Waveshare 7.5 LOLIN32
Vcc 3V
GND GND
DIN 14
CLK 13
CS 15
DC 27
RST 26
BUSY 25

Make sure to adjust the configuration.h file with both a link to your google webapp (that fetches the calendar entries) and with your location and API key for open weather maps.

For further guidance see my instructable on the project:
https://www.instructables.com/id/E-Ink-Family-Calendar-Using-ESP32/

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E-ink calendar integrating google calendar og OWM onto a 7.5 inch Waveshare screen based on an ESP32 LOLIN32 board

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