CircuitPython 7.3.1 Released! @circuitpython

From the GitHub release page:

This is CircuitPython 7.3.1, the latest bugfix revision of CircuitPython, and is a new stable release.

Notable changes to 7.3.1 since 7.3.0

  • Adafruit MatrixPortal: fix ESP32SPI hang.
  • Espressif: fix use of multiple rotaryio.IncrementalEncoder objects.
  • nRF: fix crash when waking up from sleep when a display is in use.
  • Update frozen libraries.

Download from circuitpython.org

Firmware downloads are available from the downloads page on circuitpython.org. The site makes it easy to select the correct file and language for your board.

Installation

To install follow the instructions in the Welcome to CircuitPython! guide. To install the latest libraries, see this page in that guide.

Try the latest version of the Mu editor for creating and editing your CircuitPython programs and for easy access to the CircuitPython serial connection (the REPL).

Documentation

Documentation is available in readthedocs.io.

Port status

CircuitPython has a number of "ports" that are the core implementations for different microcontroller families. Stability varies on a per-port basis. As of this release, these ports are consider stable:

  • atmel-samd: Microchip SAMD21, SAMx5x
  • cxd56: Sony Spresense
  • espressif: Espressif ESP32-S2
  • nrf: Nordic nRF52840, nRF52833
  • raspberrypi: Raspberry Pi RP2040
  • stm: ST STM32F4 chip family

These ports are considered alpha and will have bugs and missing functionality:

  • broadcom: Raspberry Pi boards such as RPi 4, RPi Zero 2W
  • espressif: ESP32-S3, ESP32-C3
  • litex: fomu
  • mimxrt10xx: NXP i.MX RT10xxx
  • stm: ST non-STM32F4 chip families

Changes since 7.3.0

Fixes and enhancements

  • Update frozen libraries. #6517. Thanks @dhalbert.

Port and board-specific changes

Espressif

  • Fix allocation of multiple rotaryio.IncrementalEncoder objects. #6430. Thanks @dhalbert.

nRF

  • Fix crash when waking up from sleep when display is in use. #6512. Backport of #6486. Thanks @DavePutz.
  • Handle BLE disconnect when reading. #6513. Backport of #6495. Thanks @DavePutz.

SAMx5x

  • Make SPI DMA setup be atomic. Fixes hangs on Adafruit MatrixPortal. #6498. Thanks @dhalbert.

Individual boards

  • Adafruit Circuit Playground Express boards: Do not freeze unneeded code. #6508. Backport of #6346. Thanks @Neradoc.

Build and infrastructure changes

  • Improve Espressif build cache key handling. #6506. Backport of #6494, #6497. Thanks @jepler.

New boards since 7.3.0

  • (none)

Known issues

  • See https://github.com/adafruit/circuitpython/issues for other issues, including issues still to be addressed for:

Thanks

Thank you to all who used, tested, and contributed since 7.3.0, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.


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