Epaper Digital watch using an ESP32 Tinypico

This is a "deepsleep" esp32 digital wristwatch.
If you need to adjust the strap size just send me a message. I build this with the rests of a Peeble dead watch.
Sponsored by epaper component Cale-idf

If it's built using a tinypico.com esp32 then it should last up to 3 days with a 80 mA battery. Provided it connects only once per day to sync time with WiFi.

Please note that the Firmware is based on ESP-IDF and won't work with Arduino framework. For more information and previews check the following page:
https://github.com/martinberlin/cale-idf/wiki/Demo-epaper-clock

Short twitter video

Two options for the epapers, both 200x200 pixels resolution:
Waveshare 1.54
Heltec 1.54

Mind setting the right class when you compile it using ESP-IDF and also doing a:

idf.py menuconfig

And adjust display configuration to match the connected ESP32 SPI Gpios. Keep in mind that is always safer to use the HSPI pins:

CONFIG_EINK_SPI_MOSI=23
CONFIG_EINK_SPI_CLK=18
CONFIG_EINK_SPI_CS=5

If you want to forget about checking if they support output. This ones will work, if it does not, then there is something wrong or the selected class does not match your EPD model.

Soon to appear in my Lectronz Fasani Corporation store small PCB with DS3231RTC to use with a GoodDisplay 1.54" epaper with Touch.