Adafruit Bluefruit LE Shield - Bluetooth LE for Arduino

The Adafruit Bluefruit LE Shield adds Bluetooth Low Energy connectivity to your Arduino in a plug-in shield form factor. Solder the included headers, stack it on your Arduino, and start communicating wirelessly with iOS and Android devices — no special iOS certification required.

The shield connects via hardware SPI (MISO, MOSI, SCK) plus chip select (D8), interrupt (D7), and reset (D4) — all configurable via solder jumpers. The onboard nRF51822 BLE module supports transparent UART data transfer, AT commands for full BLE configuration, custom GATT services, HID keyboard emulation, and over-the-air firmware updates.

Key Features

• nRF51822 BLE Module – Bluetooth Low Energy with Nordic UART RX/TX profile
• Arduino Shield Form Factor – Plug directly into Arduino Uno, Leonardo, Mega, and compatibles
• SPI Interface – Hardware SPI with configurable chip select, interrupt, and reset pins
• AT Command Set – Full control over BLE behaviour, GATT services, advertising, and more
• HID Keyboard – Emulate a Bluetooth keyboard for BLE HID-capable devices
• UriBeacon – Broadcast URLs to nearby devices
• OTA Firmware Updates – Update BLE module firmware via iOS or Android
• iOS and Android Compatible – Works with the free Bluefruit Connect app (colour picker, sensor data, game pad)

Also Available

• Bluefruit LE SPI Friend – Breakout board version for any microcontroller
• Bluefruit LE Micro – All-in-one ATmega32u4 + BLE board

Ideal For

• Adding BLE to existing Arduino projects
• Wireless communication with iOS and Android devices
• BLE-enabled robots, wearables, and art projects
• Bluetooth HID keyboard and beacon applications

Package Contents

• 1× Adafruit Bluefruit LE Shield (fully assembled)
• 1× Header strip set (for soldering)