QT Py - SAMD21

Vendor: Adafruit
Features: USB-C
Source on GitHub: samd/ADAFRUIT_QTPY_SAMD21
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

Releases

v1.27.0 (2025-12-09) .uf2 / [Release notes] (latest)
v1.26.1 (2025-09-11) .uf2 / [Release notes]
v1.26.0 (2025-08-09) .uf2 / [Release notes]
v1.25.0 (2025-04-15) .uf2 / [Release notes]

Preview builds

These are automatic builds of the development branch for the next release.

v1.28.0-preview.276.gc802a13fb6 (2026-03-19) .uf2
v1.28.0-preview.270.gd1c936db73 (2026-03-19) .uf2
v1.28.0-preview.259.g4625f97d09 (2026-03-11) .uf2
v1.28.0-preview.250.g68c2d4e457 (2026-03-09) .uf2

Firmware (Support for an external Flash chip)

Releases

v1.27.0 (2025-12-09) .uf2 / [Release notes] (latest)
v1.26.1 (2025-09-11) .uf2 / [Release notes]
v1.26.0 (2025-08-09) .uf2 / [Release notes]
v1.25.0 (2025-04-15) .uf2 / [Release notes]

Preview builds

These are automatic builds of the development branch for the next release.

v1.28.0-preview.276.gc802a13fb6 (2026-03-19) .uf2
v1.28.0-preview.270.gd1c936db73 (2026-03-19) .uf2
v1.28.0-preview.259.g4625f97d09 (2026-03-11) .uf2
v1.28.0-preview.250.g68c2d4e457 (2026-03-09) .uf2