by Radomir Dopieralski
A minimal CircuitPython board compatible with the Feather M0 Basic. Everything that is non-essential has been removed, and the smallest possible chip is used.
Here are some handy specs!
- Measures 2.0” x 0.9” x 0.28” (51mm x 23mm x 8mm) without headers soldered in
- ATSAMD21E18 @ 48MHz with 3.3V logic/power
- 256KB of FLASH + 32KB of RAM
- No EEPROM
- 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 - 23 GPIO pins
- Hardware Serial, hardware I2C, hardware SPI support
- 8 x 12-bit analog inputs
- 1 x 10-bit analog ouput (DAC)
- Yellow LED for general purpose blinking
- 4 mounting holes
Differences from Feather M0
- No battery charger
- No crystal
- No external flash
- No reset button
- No enable pin, instead you get another GPIO pin
- Two additional analog pins (AREF and A6)
- LED is on a separate, dedicated pin, not on D13
- USB-C PCB socket
Have some info to add for this board? Edit the source for this page here.
This is the latest stable release of CircuitPython that will work with the Fluff M0.
Start here if you are new to CircuitPython.
Built-in modules available: analogio, board, busio, digitalio, math, microcontroller, neopixel_write, nvm, os, pwmio, rainbowio, random, rotaryio, rtc, storage, struct, supervisor, time, touchio, usb_cdc, usb_hid, usb_midi
This is the latest unstable release of CircuitPython that will work with the Fluff M0.
Unstable builds have the latest features but are more likely to have critical bugs.
Built-in modules available: analogio, array, board, builtins, busio, 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
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.
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.
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.