Datasheet

The Power of Bluefruit LE
The Bluefruit LE module is an nRF51822 chipset from Nordic, programmed with multi-function code that can do quite a
lot! For most people, they'll be very happy to use the standard Nordic UART RX/TX connection profile. In this profile,
the Bluefruit acts as a data pipe, that can 'transparently' transmit back and forth from your iOS or Android device. You
can use our iOS App (https://adafru.it/iCi) or Android App (https://adafru.it/f4G), or write your own to communicate with
the UART service (https://adafru.it/iCF).
The board is capable of much more than just sending strings over the air! Thanks to an easy to learn AT command
set (https://adafru.it/iCG), you have full control over how the device behaves, including the ability to define and
manipulate your own GATT Services and Characteristics (https://adafru.it/iCH), or change the way that the device
advertises itself for other Bluetooth Low Energy devices to see. You can also use the AT commands to query the die
temperature, check the battery voltage, and more, check the connection RSSI or MAC address, and tons more. Really,
way too long to list here!
Use the Bluefruit App to get your project started
Using our Bluefruit iOS App (https://adafru.it/iCi) or Android App (https://adafru.it/f4G), you can quickly get your project
prototyped by using your iOS or Android phone/tablet as a controller. We have a color picker (https://adafru.it/iCI),
quaternion/accelerometer/gyro/magnetometer or location (GPS) (https://adafru.it/iCI), and an 8-button control game
pad (https://adafru.it/iCI). This data can be read over BLE and piped into the ATmega32u4 chip for processing & control
You can do a lot more too!
The Bluefruit can also act like an HID Keyboard (https://adafru.it/iOA) (for devices that support BLE HID)
Can become a BLE Heart Rate Monitor (https://adafru.it/iOB) (a standard profile for BLE) - you just need to add the
pulse-detection circuitry
Turn it into a UriBeacon (https://adafru.it/iOC), the Google standard for Bluetooth LE beacons. Just power it and
the 'Friend will bleep out a URL to any nearby devices with the UriBeacon app installed.
Built in over-the-air bootloading capability so we can keep you updated with the hottest new
firmware (https://adafru.it/iOD). Use any Android or iOS device to get updates and install them. This will update
the native code on the BLE module, to add new wireless capabilities, not program the ATmega chip.
© Adafruit Industries https://learn.adafruit.com/adafruit-feather-32u4-bluefruit-le Page 11 of 211