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

v1.28.0 (2026-04-06) .uf2 / [Release notes] (latest)
v1.27.0 (2025-12-09) .uf2 / [Release notes]
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.

v1.29.0-preview.233.g200db69894 (2026-05-14) .uf2
v1.29.0-preview.199.ga595bbba67 (2026-05-09) .uf2
v1.29.0-preview.198.g670d775365 (2026-05-08) .uf2
v1.29.0-preview.177.ge496000efc (2026-05-07) .uf2

Firmware (Support for an external Flash chip)

Releases

v1.28.0 (2026-04-06) .uf2 / [Release notes] (latest)
v1.27.0 (2025-12-09) .uf2 / [Release notes]
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.

v1.29.0-preview.233.g200db69894 (2026-05-14) .uf2
v1.29.0-preview.199.ga595bbba67 (2026-05-09) .uf2
v1.29.0-preview.198.g670d775365 (2026-05-08) .uf2
v1.29.0-preview.177.ge496000efc (2026-05-07) .uf2