CircuitPython 8.2.8 Released! @circuitpython

From the GitHub release page:

This is CircuitPython 8.2.8, the latest bugfix revision of CircuitPython, and is a new stable release.

WARNING for nRF52 boards only: If your board has an nRF52 UF2 bootloader whose version is before 0.6.1, you will not be able to load CircuitPython 8.2.0 and later. The 8.2.0 firmware is larger than what the bootloader can handle. See these instructions for updating your bootloader.

Notable changes to 8.2.8 since 8.2.7

  • Add alternative flash chips for many boards. Fixes issue with new-production Adafruit Metro M4 AirLift boards.
  • Add wifi.stop_ap() for Pico W.
  • Fix ESP32 AnalogIn on pin IO32.
  • Fix race condition in RP2040 PulseIn.
  • New boards.

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 (but see Known Issues below):

  • atmel-samd: Microchip SAMD21, SAMx5x
  • cxd56: Sony Spresense
  • espressif: Espressif ESP32, ESP32-S2, ESP32-S3, ESP32-C3
  • 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
  • litex: fomu
  • mimxrt10xx: NXP i.MX RT10xxx
  • silabs: Silicon Labs MG24 family
  • stm: ST non-STM32F4 chip families

Changes since 8.2.7

Fixes and enhancements

  • Add W25Q16JVxQ as alternative flash chip for a number of boards. #8621. Thanks @dhalbert.
  • Fix off-by-one multiple-block flash reads when read starts at MBR. #8565. Thanks @eightycc.

Port and board-specific changes

Broadcom

Espressif

  • Fix IO32 pin AnalogIn. #8607. Thanks @dhalbert.

i.MX

nRF

RP2040

  • Add wifi.stop_ap(). #8590. Thanks @eightycc.
  • Fix pulseio.PulseIn race condition. #8505. Thanks @Snipeye.

SAMx

SiLabs

Spresense

STM

Individual boards

Documentation changes

  • Fix busio example. #8568. Thanks @dhalbert.

Build and infrastructure changes

  • Update some scripts for Python 3.12. #8568. Thanks @dhalbert.

Translation additions and improvements

New boards since 8.2.7

  • Unexpected Maker BLING! #8495. Thanks @UnexpectedMaker.
  • Unexpected Maker TinyWATCH S3. #8501, #8495. Thanks @UnexpectedMaker.

Known issues

  • ESP32-S3 has significant issues with I2C devices that sleep or use clock stretching. Retry operations on these devices as necessary, or use ESP32-S2 boards.
  • Espressif boards have ESP-IDF storage leaks and occasionally crash after extended WiFi use.
  • 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 8.2.7, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

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