Adafruit Bluefruit LE SPI Friend - Bluetooth Low Energy (BLE)

The Adafruit Bluefruit LE SPI Friend adds Bluetooth Low Energy connectivity to any microcontroller with just 4–5 GPIO pins. Using SPI instead of UART means no baud rate configuration or flow control to worry about — connect via MISO, MOSI, SCK, CS, and an interrupt pin, and you're ready to go.

The onboard nRF51822 BLE module supports transparent UART data transfer via the Nordic UART profile, AT commands for full BLE configuration, custom GATT services and characteristics, HID keyboard emulation, heart rate monitor profiles, UriBeacon support, and over-the-air firmware updates.

Key Features

• nRF51822 BLE Module – Bluetooth Low Energy with Nordic UART RX/TX profile
• SPI Interface – 4-pin SPI (MISO, MOSI, SCK, CS) plus interrupt GPIO
• AT Command Set – Full control over BLE behaviour, GATT services, advertising, RSSI, battery voltage, and more
• HID Keyboard – Emulate a Bluetooth keyboard for BLE HID-capable devices
• Heart Rate Monitor Profile – Standard BLE heart rate profile (add your own pulse-detection hardware)
• UriBeacon – Broadcast URLs to nearby devices using the Google beacon standard
• 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 Shield – Arduino shield form factor for easy plug-in BLE
• Bluefruit LE Micro – All-in-one ATmega32u4 + BLE board

Ideal For

• Adding BLE to any SPI-capable microcontroller
• 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 SPI Friend (assembled and tested)
• 1× Header strip set