{"title":"Adafruit Feather 32u4 Bluefruit LE","handle":"adafruit-feather-32u4-bluefruit-le","url":"/products/adafruit-feather-32u4-bluefruit-le","description":"The Feather 32u4 Bluefruit LE combines an ATmega32u4 microcontroller with a Bluetooth Low Energy module, USB connectivity, and LiPo battery charging in one compact board. BLE is supported by all modern smartphones and tablets (iOS, Android, Mac OS X, Windows 8+), making it ideal for portable projects that communicate with a phone or tablet.\n\nThe Bluefruit module is built on the Nordic nRF51822 chipset and supports a standard UART data pipe for transparent serial communication, as well as advanced features like custom GATT services, HID keyboard emulation, and over-the-air firmware updates.\n\nKey Features\n\n\nATmega32u4 @ 8 MHz – 3.3V logic, 32KB flash, 2KB RAM\n\nNative USB – Built-in USB bootloader, serial debugging, and HID device support\n\nBluetooth Low Energy (nRF51822) – iOS and Android compatible without special certification\n\nUART Service – Transparent serial data pipe between BLE device and microcontroller\n\nAT Command Set – Full control over BLE behaviour, GATT services, advertising, and more\n\nBLE HID Keyboard – Act as a wireless keyboard for compatible devices\n\nBLE Heart Rate Monitor – Standard BLE health profile support (external sensor required)\n\nUriBeacon Support – Broadcast URLs to nearby devices\n\nOver-the-Air Updates – Update BLE module firmware via iOS or Android\n\n20 GPIO Pins – Including 10 analogue inputs and 7 PWM outputs\n\nHardware Serial, I2C & SPI – Full peripheral support\n\nBuilt-in LiPo Charger – 100 mA charging with status indicator LED\n\nBattery Monitoring – Battery voltage routed to an analogue pin via divider\n\n3.3V Regulator – 500 mA peak current output\n\n\nSpecifications\n\n\nDimensions – 51 × 23 × 8 mm (without headers)\n\nWeight – 5.7 g\n\nMounting – 4 mounting holes\n\n\nAlso Available\n\nFeather 32u4 Bluefruit LE – With Headers\nFeather 32u4 Bluefruit LE – With Stacking Headers\n\nFeather 32u4 Adalogger – With MicroSD card holder\n\nFeather 32u4 Basic Proto – With prototyping area\nFeather 32u4 RFM95 LoRa Radio (868/915 MHz)\n\nFeather 328P – ATmega328P variant\n\n\nIdeal For\n\nPhone-controlled projects via iOS or Android\nWireless sensor data transmission\nBLE HID keyboards and controllers\nBluetooth beacons and proximity applications\n\n\nPackage Contents\n\n1× Assembled and tested Feather 32u4 Bluefruit LE\n1× Header set\n\n\n\nNote: LiPo battery and USB cable are sold separately.\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":6446,"title":"Default Title","sku":"AF-2829","price":60.75,"on_sale":false,"in_stock":true,"available_quantity":76,"option1":"Default Title"}]}