Guides for product: Adafruit Feather M0 Bluefruit LE

Feather is the new development board from Adafruit, and like its namesake it is thin, light, and lets you fly! We designed Feather to be a new standard for portable microcontroller cores.

This is the Adafruit Feather M0 Bluefruit LE - our take on an 'all-in-one' Arduino-compatible + Bluetooth Low Energy with built in USB and battery charging. It's an Adafruit Feather M0 with a BTLE module, ready to rock! We have other boards in the Feather family, check'em out here.

Bluetooth Low Energy is a hot, low-power, 2.4GHz spectrum wireless protocol. In particular, it's the only wireless protocol that you can use with iOS without needing special certification, and it's supported by all modern smart phones. This makes it excellent for use in portable projects that will make use of an iOS or Android phone or tablet. It also is supported in Mac OS X and Windows 8+.

We have quite a few BTLE-capable Feathers (it's a popular protocol!) so check out our BT Feather guide for some comparison information.

At the Feather M0's heart is an ATSAMD21G18 ARM Cortex M0 processor, clocked at 48 MHz and at 3.3V logic, the same one used in the new Arduino Zero. This chip has a whopping 256K of FLASH (8x more than the Atmega328 or 32u4) and 32K of RAM (16x as much)! This chip comes with built in USB so it has USB-to-Serial program & debug capability built in with no need for an FTDI-like chip.

To make it easy to use for portable projects, we added a connector for any of our 3.7V Lithium polymer batteries and built in battery charging. You don't need a battery, it will run just fine straight from the micro USB connector. But, if you do have a battery, you can take it on the go, then plug in the USB to recharge. The Feather will automatically switch over to USB power when its available. We also tied the battery thru a divider to an analog pin, so you can measure and monitor the battery voltage to detect when you need a recharge.

Here's some handy specs! Like all Feather M0's you get:

  • Measures 2.0" x 0.9" x 0.28" (51mm x 23mm x 8mm) without headers soldered in
  • Light as a (large?) feather - 5.7 grams
  • ATSAMD21G18 @ 48MHz with 3.3V logic/power
  • 3.3V regulator with 500mA peak current output
  • USB native support, comes with USB bootloader and serial port debugging
  • You also get tons of pins - 20 GPIO pins
  • Hardware Serial, hardware I2C, hardware SPI support
  • 8 x PWM pins
  • 10 x analog inputs
  • 1 x analog output
  • Built in 100mA lipoly charger with charging status indicator LED
  • Pin #13 red LED for general purpose blinking
  • Power/enable pin
  • 4 mounting holes
  • Reset button

The Feather M0 Bluefruit LE uses the extra space left over to add our excellent Bluefruit BTLE module + two status indicator LEDs.

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 or Android App, or write your own to communicate with the UART service.

The board is capable of much more than just sending strings over the air!  Thanks to an easy to learn AT command set, you have full control over how the device behaves, including the ability to define and manipulate your own GATT Services and Characteristics, 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 or Android App, you can quickly get your project prototyped by using your iOS or Android phone/tablet as a controller. We have a color picker, quaternion/accelerometer/gyro/magnetometer or location (GPS), and an 8-button control game pad. This data can be read over BLE and piped into the ATSAMD21G18 chip for processing & control

You can do a lot more too!

Comes fully assembled and tested, with a USB bootloader that lets you quickly use it with the Arduino IDE. We also toss in some header so you can solder it in and plug into a solderless breadboard. Lipoly battery and MicroUSB cable not included (but we do have lots of options in the shop if you'd like!)

Check out our tutorial for all sorts of details, including schematics, files, IDE instructions, and more!

Twice the Cortex M0 for a powerful BLE portable
Adafruit Feather M0 Bluefruit LE
Get more high speed serial commports without bitbanging
Using ATSAMD21 SERCOM for more SPI, I2C and Serial ports
Step in, step out, step over and repeat!
Proper Debugging of ATSAMD21 Processors
Learn how to load MicroPython firmware on a development board.
MicroPython Basics: How to Load MicroPython on a Board
How to use MicroPython with boards like the Feather M0 & Arduino Zero!
MicroPython for SAMD21
Using GDB to better understand program state and history.
Debugging the SAMD21 with GDB
How to use a SSD1306 OLED display with CircuitPython boards.
CircuitPython Hardware: SSD1306 OLED Display
How to use the PCA9685 PWM & servo driver with CircuitPython!
CircuitPython Hardware: PCA9685 PWM & Servo Driver
How to use the PCA9685 DC Motor & Stepper driver with CircuitPython!
CircuitPython Hardware: PCA9685 DC Motor & Stepper Driver
How to use LED Backpacks & FeatherWings with CircuitPython!
CircuitPython Hardware: LED Backpacks & FeatherWings
How to use Charlieplex LED matrices with CircuitPython!
CircuitPython Hardware: Charlieplex LED Matrix
How to write text on any MicroPython display.
MicroPython Displays: Drawing Text
How to draw on a ILI9341 TFT display with CircuitPython!
CircuitPython Hardware: ILI9341 TFT & FeatherWing
How to draw basic shapes on pixel-based displays with MicroPython!
MicroPython Displays: Drawing Shapes
Use a Feather Bluefruit LE to make a Wireless UNTZ!
Wireless UNTZtrument Using BLE MIDI
Make a Simple JTAG Debugging FeatherWing for the M0
Debug Header for the Feather [M0]
Build an inexpensive Bluetooth device to give a disable user access to their iPad or iPhone
Using Bluefruit BLE to Give Disabled Users Switch Control Access to IOS Devices
A Multipurpose Enclosure for Adafruit Feather
3D Printed Case for Adafruit Feather
Learn how to make a Bluetooth Low Energy App for iOS using Swift.
Create a Bluetooth LE App for iOS
Boards of a Feather flock together!
Introducing Adafruit Feather
NeoPixels to the max!
Adafruit NeoPXL8 FeatherWing and Library
Use a 60 NeoPixel ring and Feather M0 to build this stylish clock with options for music, BLE, infrared, and touch controls.
Talking Musical NeoPixel Clock with Infrared, BLE and Touch Controls
An odd little robot built around CRICKIT that's vaguely reminiscent of a cricket.
CRICKIT Flippy Robot
A small CRICKIT based hopping robot you can build 3 ways