FemtoBeacon ESP32 coin (ESP32-D2WD) - WiFi test
A 9mm radius (dime sized) coin with WiFi features! Open source. Based on the ESP32-D2WD chipset, this design has an onboard LDO 3.3V output voltage regulator (input 5.5V max), a 32.768KHz low power mode clock, WiFi, Bluetooth, and an RGB LED. SPI/JTAG headers are accessible. #esp32