Guides for product: Adafruit Feather M0 Express - Designed for CircuitPython

We love all our Feathers equally, but this Feather is very special. It's our first Feather that is specifically designed for use with CircuitPython! CircuitPython is our beginner-oriented flavor of MicroPython - and as the name hints at, its a small but full-featured version of the popular Python programming language specifically for use with circuitry and electronics.

Please note, CircuitPython does not come preloaded. See the full guide linked below for instructions on installing it.

That doesn't mean you cant also use it with Arduino IDE! 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.

Here's some handy specs!

  • Measures 2.0" x 0.9" x 0.28" (51mm x 23mm x 8mm) without headers soldered in
  • Light as a (large?) feather - 5 grams
  • ATSAMD21G18 @ 48MHz with 3.3V logic/power
  • 256KB of FLASH + 32KB of RAM
  • No EEPROM
  • 32.768 KHz crystal for clock generation & RTC
  • 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
  • PWM outputs on all pins
  • 6 x 12-bit analog inputs
  • 1 x 10-bit analog ouput (DAC)
  • 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 Express uses the extra space left over to add a Mini NeoPixel2 MB SPI Flash storage and a little prototyping space. You can use the SPI Flash storage like a very tiny hard drive. When used in CircuitPython, the 2 MB flash acts as storage for all your scripts, libraries and files. When used in Arduino, you can read/write files to it, like a little datalogger or SD card, and then with our helper program, access the files over USB.

Easy reprogramming: the Feather M0 comes pre-loaded with the UF2 bootloader, which looks like a USB storage key. Simply drag firmware on to program, no special tools or drivers needed! It can be used to load up CircuitPython, PXT MakeCode or Arduino IDE (it is bossa-compatible)

Comes fully assembled and tested, with the UF2 USB bootloader. We also toss in some header so you can solder it in and plug into a solderless breadboard. 

Lipoly battery and USB cable not included (but we do have lots of options in the shop if you'd like!)

Wanna get started with this fancy new Feather? We have a full guide with details on using it with both Arduino IDE and CircuitPython. The guide also has wiring information, drivers, Fritzing objects, schematics, datasheets and more!

 

Learn how to use a microSD card to store code & data with CircuitPython and MicroPython!
CircuitPython Hardware: SD Cards
30
Intermediate
Using GDB to better understand program state and history.
Debugging the SAMD21 with GDB
11
Intermediate
How to use a SSD1306 OLED display with CircuitPython boards.
CircuitPython Hardware: SSD1306 OLED Display
27
Intermediate
How to use the PCA9685 PWM & servo driver with CircuitPython!
CircuitPython Hardware: PCA9685 PWM & Servo Driver
21
Intermediate
How to use the PCA9685 DC Motor & Stepper driver with CircuitPython!
CircuitPython Hardware: PCA9685 DC Motor & Stepper Driver
20
Intermediate
How to use LED Backpacks & FeatherWings with CircuitPython!
CircuitPython Hardware: LED Backpacks & FeatherWings
17
Intermediate
How to use Charlieplex LED matrices with CircuitPython!
CircuitPython Hardware: Charlieplex LED Matrix
15
Intermediate
How to draw on a ILI9341 TFT display with CircuitPython!
CircuitPython Hardware: ILI9341 TFT & FeatherWing
5
Intermediate
Get running faster than ever with the first Adafruit Express board
Adafruit Feather M0 Express - Designed for CircuitPython
42
Beginner
Boards of a Feather flock together!
Introducing Adafruit Feather
79
Beginner
Revisiting the Olde Days of television and radio
Circuit Playground Express (& other ATSAMD21 Boards) DAC Hacks
10
Intermediate
Circuit Python Keyboard emulation
Arcade Button Control Box
23
Intermediate
Share your code with the world
Creating and sharing a CircuitPython library
17
Intermediate
Learn how to control digital inputs and outputs with CircuitPython!
CircuitPython Basics: Digital Inputs & Outputs
16
Beginner
NeoPixel Edge Lit Acrylic
LED Acrylic Sign
42
Beginner
Learn how to control analog, or continuous voltage, values with CircuitPython!
CircuitPython Basics: Analog Inputs & Outputs
20
Beginner
Learn how to talk to I2C and SPI devices with CircuitPython!
CircuitPython Basics: I2C and SPI
33
Beginner
Explore some new features in CircuitPython 2.0.0 with nothing but your board and one wire!
CPU Temperature Logging with CircuitPython
11
Beginner
Now that's a cute lookin' gamepad
JOY Controller for Adafruit Feather
20
Intermediate
Learn about porting an Arduino library to CircuitPython with the VL6180X distance sensor.
Porting an Arduino library to CircuitPython: VL6180X Distance Sensor
7
Advanced
Build a feather based mp3 player!
MP3 Feather - Gordon Cole
5
Intermediate
POV DotStar Pixel Painter!
CircuitPython Painter
29
Intermediate
New to CircuitPython? This is the place to start.
Welcome to CircuitPython!
180
Beginner
How to use servo motors with CircuitPython and Arduino
Using Servos With CircuitPython and Arduino
17
Beginner