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Feather M0 Basic by Adafruit

Feather is thin, light, and lets you fly! Adafruit designed Feather to be a new open standard for portable microcontroller cores.

This is the Feather M0 Basic Proto, it has a bunch of prototyping space built right in. Check out the other boards in the Feather family.

At the Feather M0’s heart is an ATSAMD21G18 ARM Cortex M0 processor, clocked at 48 MHz and at 3.3 V logic, the same one used in the new Arduino Zero. This chip has a whopping 256 KB of FLASH (8x more than the Atmega328 or 32u4) and 32 KB 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, there is a connector for 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 it is available. The battery is tied thru a divider to an analog pin, so you can measure and monitor the battery voltage to detect when you need a recharge.

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 - 4.6 grams
  • ATSAMD21G18 @ 48 MHz with 3.3V logic/power
  • 256KB of FLASH + 32KB 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
  • 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 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

The Feather M0 Basic Proto has some extra space left over, so we give you a tiny little prototyping area. If you just need to attach a button or sensor, you may be able to skip out on a breadboard and wire it directly on there.

Comes fully assembled and tested, with a USB bootloader. Includes headers so you can solder it in and plug into a solderless breadboard.

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CircuitPython 9.2.8

This is the latest stable release of CircuitPython that will work with the Feather M0 Basic. Use this release if you are new to CircuitPython.

Release Notes for 9.2.8

DOWNLOAD .UF2 NOW DOWNLOAD .BIN NOW
Modules included in this download analogio array board builtins busio busio.SPI busio.UART collections digitalio math microcontroller neopixel_write nvm os pwmio rainbowio random rotaryio rtc storage struct supervisor sys time touchio usb_cdc usb_hid usb_midi

Features: Feather-Compatible, Battery Charging, Breadboard-Friendly

CircuitPython 10.0.0-beta.0

This is the latest development release of CircuitPython that will work with the Feather M0 Basic.

Alpha development releases are early releases. They are unfinished, are likely to have bugs, and the features they provide may change. Beta releases may have some bugs and unfinished features, but should be suitable for many uses. A Release Candidate (rc) release is considered done and will become the next stable release, assuming no further issues are found.

Please try alpha, beta, and rc releases if you are able. Your testing is invaluable: it helps us uncover and find issues quickly.

Release Notes for 10.0.0-beta.0

DOWNLOAD .UF2 NOW DOWNLOAD .BIN NOW
Modules included in this download analogio array board builtins busio busio.SPI busio.UART collections digitalio math microcontroller neopixel_write nvm os pwmio rainbowio random rotaryio rtc storage struct supervisor sys time touchio usb_cdc usb_hid usb_midi

Features: Feather-Compatible, Battery Charging, Breadboard-Friendly

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. These releases are even newer than the development release listed above. Try them if you want the absolute latest and are feeling daring or want to see if a problem has been fixed.

Previous Versions of CircuitPython

All previous releases of CircuitPython are available for download from Amazon S3 through the button below. For very old releases, look in the OLD/ folder for each board. Release notes for each release are available at GitHub button below.

Older releases are useful for testing if you something appears to be broken in a newer release but used to work, or if you have older code that depends on features only available in an older release. Otherwise we recommend using the latest stable release.

BROWSE S3 BROWSE GITHUB

Update UF2 Bootloader

Latest version: v3.16.0

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