It shares the same Seeed Studio XIAO ESP32-C3 microcontroller, 0.49 inch OLED display, and tiny 40 mAh LiPo battery. The only thing that’s really changed, aside from the adjustments necessary ...

ATMegaZero ESP32- S2, showing optional color-coded 40 ... it has some neat features like a connector for inexpensive SSD1306 and SH1106-based OLED displays. Being able to use existing accessories ...