{"title":"Adafruit Feather 32u4 Bluefruit LE with Headers - Assembled","handle":"adafruit-feather-32u4-bluefruit-le-with-headers-assembled","url":"/products/adafruit-feather-32u4-bluefruit-le-with-headers-assembled","description":"The Feather 32u4 Bluefruit LE with Headers combines an ATmega32u4 microcontroller with a Bluetooth Low Energy module, USB connectivity, and LiPo battery charging — with standard headers pre-soldered so you can plug straight into a breadboard.\n\nThe Bluefruit module is built on the Nordic nRF51822 chipset and supports transparent UART serial communication, custom GATT services, HID keyboard emulation, UriBeacon broadcasting, and over-the-air firmware updates. BLE is supported by all modern smartphones and tablets (iOS, Android, Mac OS X, Windows 8+).\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\n\nPre-Soldered Standard Headers – Ready for breadboard use immediately\n\nUART Service – Transparent serial data pipe between BLE device and microcontroller\n\nAT Command Set – Full control over BLE behaviour, GATT services, and advertising\n\nBLE HID Keyboard – Act as a wireless keyboard for compatible 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\n\nFeather 32u4 Bluefruit LE – Without headers\nFeather 32u4 Bluefruit LE – With Stacking Headers\n\nFeather 32u4 Adalogger – With MicroSD card holder\n\nFeather 32u4 Basic Proto – With prototyping area\n\nFeather 32u4 FONA – With cellular connectivity\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 with pre-soldered headers\n\n\n\nTip: This version comes with standard headers pre-soldered. If you need to stack FeatherWings, consider the stacking headers version.\n\n\n\nNote: LiPo battery and USB cable are sold separately.\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":8006,"title":"Default Title","sku":"AF-3379","price":62.33,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":3,"option1":"Default Title"}]}