{"title":"Adafruit Bluefruit LE SPI Friend - Bluetooth Low Energy (BLE)","handle":"adafruit-bluefruit-le-spi-friend-bluetooth-low-energy-ble","url":"/products/adafruit-bluefruit-le-spi-friend-bluetooth-low-energy-ble","description":"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.\n\nThe 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.\n\nKey Features\n\n\nnRF51822 BLE Module – Bluetooth Low Energy with Nordic UART RX/TX profile\n\nSPI Interface – 4-pin SPI (MISO, MOSI, SCK, CS) plus interrupt GPIO\n\nAT Command Set – Full control over BLE behaviour, GATT services, advertising, RSSI, battery voltage, and more\n\nHID Keyboard – Emulate a Bluetooth keyboard for BLE HID-capable devices\n\nHeart Rate Monitor Profile – Standard BLE heart rate profile (add your own pulse-detection hardware)\n\nUriBeacon – Broadcast URLs to nearby devices using the Google beacon standard\n\nOTA Firmware Updates – Update BLE module firmware via iOS or Android\n\niOS and Android Compatible – Works with the free Bluefruit Connect app (colour picker, sensor data, game pad)\n\n\nAlso Available\n\n\nBluefruit LE Shield – Arduino shield form factor for easy plug-in BLE\n\nBluefruit LE Micro – All-in-one ATmega32u4 + BLE board\n\n\nIdeal For\n\nAdding BLE to any SPI-capable microcontroller\nWireless communication with iOS and Android devices\nBLE-enabled robots, wearables, and art projects\nBluetooth HID keyboard and beacon applications\n\n\nPackage Contents\n\n1× Adafruit Bluefruit LE SPI Friend (assembled and tested)\n1× Header strip set\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":9560,"title":"Default Title","sku":"AF-2633","price":35.25,"on_sale":false,"in_stock":true,"available_quantity":32,"option1":"Default Title"}]}