.. _changelog_v2_2_0:

v2.2.0
======

v2.2.0 introduces **AprilTags support** (``image.find_apriltags()``), enables
**CAN2** on the OpenMV 2 / 3, adds extra MicroPython modules, restores Pixy
emulation callbacks, and aligns the REPL Ctrl-D/C/A handling with standard
MicroPython boards. It introduces **no breaking API changes** — v2.1.0
scripts run unchanged.

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Highlights
----------

- **AprilTags** — ``image.find_apriltags()`` fiducial-marker detection.
- **CAN2** — enabled on the OpenMV 2 and OpenMV 3.
- **More MicroPython modules** enabled.
- **REPL** — Ctrl-D / Ctrl-C / Ctrl-A now behave like standard MicroPython
  boards.
- **No breaking API changes** — reflash and your v2.1.0 scripts run
  unchanged.

New features
------------

- **AprilTags** — added AprilTag fiducial-marker detection
  (``image.find_apriltags()``), with release/bug fixes.
- **CAN2** — enabled CAN2 on the OpenMV 2 / 3 (with CAN init0/de-init in
  ``main``).
- Enabled additional MicroPython modules and restored the Pixy-emulation
  callbacks.

Other changes and improvements
------------------------------

- The REPL now handles Ctrl-D / Ctrl-C / Ctrl-A the same way as standard
  MicroPython boards; updated the face-detection and face-tracking example
  scripts.

Bug fixes
---------

- Fixed QR-code decoding bugs, the Haar cascade step, and the bootloader LED.

Hardware and board support
--------------------------

- **OpenMV 2 / 3** — CAN2 enabled; added an SWD-programmer flag.

Breaking API changes
--------------------

v2.2.0 introduces **no breaking Python API changes**. Scripts that ran on
v2.1.0 run unchanged on v2.2.0 — just reflash the firmware.