Feather M0 Express

by Adafruit

Image of Board

The Adafruit Feather M0 Express was one of the first development boards designed for CircuitPython by Adafruit. Unlike the original Feather M0 Basic, it added a NeoPixel status LED and external 2 MB SPI Flash for storing CircuitPython code.

It is a great entry into the Feather ecosystem with CircuitPython. However, it is now out performed by the Feather M4 Express which has a faster microcontroller with more RAM. The additional RAM allows CircuitPython to load more code all at once than this Feather M0 Express can. Check out the other boards in the Feather family.

Technical details

  • Measures 2.0” x 0.9” x 0.28” (51 mm x 23 mm x 8 mm) without headers soldered in
  • Light as a (large?) feather - 5 grams
  • TSAMD21G18 @ 48 MHz with 3.3V logic/power
  • 256 KB of FLASH + 32 KB of RAM
  • No EEPROM
  • 32.768 kHz crystal for clock generation & RTC
  • 3.3 V regulator with 500 mA peak current output
  • USB native support, comes with USB bootloader and serial port debugging
  • 20x GPIO pins (PWM outputs on all pins)
    • Hardware Serial, hardware I2C, hardware SPI support
    • 6 x 12-bit analog inputs
    • 1 x 10-bit analog ouput (DAC)
  • Built in 100 mA lipoly charger with charging status indicator LED
  • Pin #13 red LED for general purpose blinking
  • Power/enable pin
  • 4 mounting holes
  • Reset button

Tutorials

Purchase

Contribute

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CircuitPython 7.3.3

This is the latest stable release of CircuitPython that will work with the Feather M0 Express.

Start here if you are new to CircuitPython.

Release Notes for 7.3.3

Built-in modules available: adafruit_pixelbuf, analogio, audiobusio, audiocore, audioio, board, busio, digitalio, displayio, errno, fontio, math, microcontroller, neopixel_write, nvm, onewireio, os, paralleldisplay, pulseio, pwmio, rainbowio, random, rotaryio, rtc, storage, struct, supervisor, terminalio, time, touchio, traceback, usb_cdc, usb_hid, usb_midi

CircuitPython 8.0.0-beta.4

This is the latest unstable release of CircuitPython that will work with the Feather M0 Express.

Unstable builds have the latest features but are more likely to have critical bugs.

Release Notes for 8.0.0-beta.4

Built-in modules available: adafruit_pixelbuf, analogio, array, audiobusio, audiocore, audioio, board, builtins, busio, collections, digitalio, displayio, dotenv, errno, fontio, math, microcontroller, neopixel_write, nvm, onewireio, os, paralleldisplay, pulseio, pwmio, rainbowio, random, rotaryio, rtc, storage, struct, supervisor, sys, terminalio, time, touchio, usb_cdc, usb_hid, usb_midi

Absolute Newest

Every time we commit new code to CircuitPython we automatically build binaries for each board and language. The binaries are stored on Amazon S3, organized by board, and then by language. Try them if you want the absolute latest and are feeling daring or want to see if a problem has been fixed.

Past Releases

All previous releases are listed on GitHub, with release notes, and are available for download from Amazon S3. They are handy for testing, but otherwise we recommend using the latest stable release. Some older GitHub release pages include the same binaries for downloading. But we have discontinued including binaries as assets on newer release pages because of the large number of files for each release.

BROWSE GITHUB

Update UF2 Bootloader

Latest version: v3.14.0

The bootloader allows you to load CircuitPython, MakeCode, and Arduino programs. The bootloader is not CircuitPython. You can check the current version of your bootloader by looking in the INFO_UF2.TXT file when the BOOT drive is visible (FEATHERBOOT, CPLAYBOOT, etc.).

It is not necessary to update your bootloader if it is working fine. Read the release notes on GitHub to see what has been changed. In general, we recommend you not update the bootloader unless you know there is a problem with it or a support person has asked you to try updating it.

To update, first save the contents of CIRCUITPY, just in case. Then double-click the reset button to show the BOOT drive. Drag the update-bootloader .uf2 file to the BOOT drive. Wait a few tens of seconds for the bootloader to update; the BOOT drive will reappear. After you update, check INFO_UF2.TXT to verify that the bootloader version has been updated. Then you will need to reload CircuitPython.

DOWNLOAD UPDATER UF2