Image courtesy of Adafruit

The Adafruit Feather 32u4 Bluefruit LE is an all-in-one solution that combines an ATmega32U4 (the same MCU used in the Arduino Leonardo) and a “Bluefruit” BTLE module on one compact board. The board runs at 3.3V, has 20 GPIO pins (of which, 7 are PWM capable and 10 are can function as ADC inputs), a 8 MHz crystal, a micro USB-B connection, a battery connector, a reset button, and status LEDs. You can learn more about the specifications of the Adafruit Feather 32u4 Bluefruit LE on Adafruit’s product page.

Buy the Adafruit Feather 32u4 Bluefruit LE from Amazon, or Adafruit.