My Watchy OS

In the summer of 2021, I bought a Watchy : a hobbyist watch with a tiny (200x200 pixel, 4cm) e-ink screen, an ESP32 processor (plus separate real-time clock chip), 4 buttons, a step-counting accelerometer, and 200mAh battery. I was doing a lot of ESP32 coding at work, so the idea of writing my own watch software sounded like fun, and the ESP32 is pretty powerful: tons of memory, bluetooth/wifi…