Adafruit Feather M0 Bluefruit LE
ARM Cortex-M0+ dev board with Bluetooth LE (nRF51822) in the compact Feather form factor. Features 256KB flash, 32KB RAM, native USB, and a built-in LiPo charger for wireless wearable and IoT projects.
$29.95
Tap any value to browse matching devices
Specifications
Components
Nordic Semiconductor BLE 4.0 SoC providing Bluetooth Low Energy connectivity via the MDBT40 module.
Bus Interfaces
GPIO Map
Overview
The Adafruit Feather M0 Bluefruit LE combines the ATSAMD21G18 ARM Cortex-M0+ microcontroller running at 48 MHz with a Nordic nRF51822-based Bluetooth Low Energy radio in the standard Feather form factor. With 256KB of flash and 32KB of RAM, it offers significantly more headroom than 8-bit AVR boards while staying compact enough for wearable and portable builds.
The onboard Bluefruit LE module provides full BLE connectivity compatible with iOS, Android, macOS, and Windows 8+. Adafruit's Bluefruit LE Connect app enables UART bridging, HID profiles, and sensor streaming without writing a line of app code — making prototyping BLE-enabled devices fast and approachable.
Power management is a first-class feature: a built-in 100mA LiPo charger with status LED lets you connect a single-cell 3.7V lithium polymer battery directly to the board. The USB port doubles as a programming interface and charger, and the regulator supplies a clean 3.3V at up to 500mA for peripherals.
With 20 GPIO pins, 8 PWM outputs, 10 analog inputs, hardware SPI/I2C/UART, and native USB for HID or CDC, this board is well suited to BLE sensor nodes, wearables, BLE beacons, and any project needing a capable ARM M0 with wireless connectivity.
Use Cases
5IoT
Internet of Things applications including connected sensors, actuators, and smart devices that communicate over WiFi, BLE, LoRa, or other wireless protocols.
Wearable
Body-worn computing devices including smartwatches, fitness bands, and health monitors.
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.
BLE Sensor Node
Bluetooth Low Energy sensor node for collecting and transmitting environmental, proximity, or asset data wirelessly.
Prototyping
Rapid hardware prototyping and proof-of-concept development with breadboard-friendly form factors and accessible development environments.
Resources
Where to Buy
Explore more of the directory — popular use cases, firmware, and specs to browse next.
