Adafruit Feather 32u4 Bluefruit LE

Feather 32u4 Bluefruit is a compact microcontroller board that offers seamless wireless connectivity through Bluetooth Low Energy. With an ATmega32u4 chip running at 8 MHz and 3.3V logic, it combines UART RX/TX connection profiles for data transfer with iOS and Android devices, making it versatile for various portable applications.

Specifications:

• ATmega32u4 @ 8MHz
• 3.3V logic/power
• Built-in USB and battery charging
• 20 GPIO pins, including 7 PWM and 10 analog inputs
• 100mA LiPoly charger with status indicator

Use cases include creating custom Bluetooth-powered applications, interfacing with smartphones, and building wireless sensor networks. The Feather package includes a USB bootloader for easy Arduino IDE integration, allowing for rapid prototyping and development.