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.450.g562d6be365 (2026-06-30) .uf2
v1.29.0-preview.434.g57219fcb6d (2026-06-26) .uf2
v1.29.0-preview.432.g9d3881f43a (2026-06-26) .uf2
v1.29.0-preview.428.gb5ca38553e (2026-06-25) .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.450.g562d6be365 (2026-06-30) .uf2
v1.29.0-preview.434.g57219fcb6d (2026-06-26) .uf2
v1.29.0-preview.432.g9d3881f43a (2026-06-26) .uf2
v1.29.0-preview.428.gb5ca38553e (2026-06-25) .uf2