MicroPython v1.28 landed on April 6, 2026. Highlights:

• machine.PWM now available on stm32 and alif — completing PWM support across all Tier 1 and Tier 2 microcontroller-based ports
• New standardized machine.CAN API, with stm32 as the first implementation (bxCAN and FD-CAN peripherals)
• PEP 750 template strings (t-strings) — a new string literal type that keeps interpolation components as separate objects within a Template
• The weakref module with weakref.ref and weakref.finalize classes
• 11 new boards across esp32, mimxrt, rp2, and stm32

We’ve put together an interactive release notes page that runs real MicroPython in your browser via PyScript. Try editing and executing the t-string and weakref examples live.

For the full list of changes, see the v1.28.0 release on GitHub.