Adafruit Feather 32u4 Bluefruit LE
Feather-format ATmega32u4 board with integrated nRF51822 Bluetooth LE, LiPo charging, native USB, 20 GPIO, and over-the-air firmware updates — an all-in-one BLE development board for iOS and Android connectivity.
$29.95
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Specifications
Components
8-bit AVR with native USB at 8 MHz, 32KB flash, 2KB SRAM
Nordic nRF51822 ARM Cortex-M0 Bluetooth LE 4.1 SoC with 256KB flash, AT command firmware, GATT and UART profiles
Microchip MCP73831 100mA LiPo charge management IC
Bus Interfaces
GPIO Map
Overview
The Adafruit Feather 32u4 Bluefruit LE combines the ATmega32u4 Arduino-compatible microcontroller with an integrated Nordic nRF51822-based Bluetooth Low Energy module in the compact Feather form factor. This makes it a complete BLE development platform: the ATmega32u4 handles application logic and hardware interfacing while the Bluefruit module manages Bluetooth communication with iOS and Android devices.
The BLE module is pre-loaded with Adafruit's Bluefruit firmware, supporting the Nordic UART profile for bidirectional data piping, programmable custom GATT services via AT commands, HID keyboard functionality, and over-the-air firmware updates for the BLE module itself. Two additional status LEDs indicate BLE connection state and activity.
The ATmega32u4 runs at 8 MHz with 3.3V logic, providing 20 GPIO, 7 PWM, 10 analog inputs, hardware Serial/I2C/SPI, and native USB. Adafruit's Bluefruit Connect app for iOS and Android provides ready-to-use interfaces for UART communication, control pads, color pickers, and accelerometer data.
Battery power is managed by an integrated 100mA LiPoly charger with JST connector and automatic USB/battery switchover. At 51.2 × 22.8 × 8mm and 5.7 grams, the board is well suited for wearable BLE peripherals, IoT sensors, HID accessories, and any project requiring smartphone connectivity with battery operation.
Use Cases
6bluetooth
BLE Peripheral
A Bluetooth Low Energy peripheral device that can be discovered and connected to by smartphones, tablets, or BLE central devices for data exchange.
Wearable
Body-worn computing devices including smartwatches, fitness bands, and health monitors.
IoT
Internet of Things applications including connected sensors, actuators, and smart devices that communicate over WiFi, BLE, LoRa, or other wireless protocols.
hid-devices
portable
Where to Buy
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