v4.2.0

v4.2.0 adds object-detection support to the ML pipeline, reworks the boot scripts / pyexec, and fixes JPEG loading and USB high-speed (ULPI). The boot/exec rework is a behavior change — read the breaking change below.

Highlights

• Object detection support added to the TensorFlow/ML pipeline.

• Reworked boot scripts and pyexec.

• Fixed JPEG loading and the USB high-speed (ULPI) DIR pin.

• Breaking: the boot-script / pyexec rework changes startup behavior — see the breaking change.

New features

• Object detection — added object-detection model support to the TensorFlow/ML inference pipeline.

Other changes and improvements

• The bundled MicroPython submodule was updated.

Bug fixes

• Fixed JPEG image loading and the USB high-speed ULPI DIR pin definition.

Hardware and board support

• Arduino Nano RP2040 Connect — set the default I2C pins.

Breaking API changes

User-visible API breaks between v4.1.4 and v4.2.0.

The only breaking change is a behavior change to the boot/exec sequence.

Boot scripts and pyexec reworked (behavior)

The boot scripts and the pyexec script-execution path were reworked. Behavior is largely the same, but the order/handling of boot and script execution changed — re-check scripts that relied on the previous startup sequence (e.g. custom boot.py behavior or exact exception handling at script end).

Commit: b0c7a3272

Migration checklist

Re-check any custom boot.py / startup-dependent behavior against the reworked boot/exec sequence (the boot/exec change). All other scripts run unchanged.