ThePiHut featured this week an open supply ePaper watch powered by an ESP32 module. A number of the peripherals featured embody a 3-axis accelerometer, a vibration motor, a LiPo battery connector and lots of different options.
The Watchy has Bluetooth and Wi-Fi connectivity because it options the next microcontroller:
ESP32-PICO-D4 — Xtensa 32-bit LX6 MCU (as much as 240MHz), 520 KB RAM, 4MB Flash