SparkFun SAMD21 Dev Breakout

Vendor: Sparkfun
Features: Battery Charging, DAC, USB
Source on GitHub: samd/SPARKFUN_SAMD21_DEV_BREAKOUT
More info: Website

Installation instructions

For deploying the MicroPython firmware to the SAMD module, follow the procedure:

  • Push the reset button twice or call machine.bootloader(). A drive icon should appear representing a virtual drive.

  • Copy the .uf2 file with the required firmware to that drive.

As soon as the drive disappears, the firmware is loaded and started.

Firmware

Preview builds

v1.26.0-preview.254.gb725c26b4 (2025-06-17) .uf2
v1.26.0-preview.251.g5ade8b705 (2025-06-16) .uf2
v1.26.0-preview.243.gcfcc53da7 (2025-06-16) .uf2
v1.26.0-preview.231.gfa393feae (2025-06-13) .uf2
(These are automatic builds of the development branch for the next release)