CircuitPython 9.2.8

This is CircuitPython 9.2.8, 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, due to increased size of the firmware. See these instructions for updating your bootloader.

Highlights of this release

• Fix deque bug.
• Fix I2S audio file read causing memory corruption.
• Support "Spectra6" six-color e-ink displays.
• Fix audiodelays.Delay when freq_shift=True.
• Board fixes.

Incompatibility warnings

• Uses of deprecated displayio bindings are now called out with warnings. For instance, displayio.Display is deprecated in favor of busdisplay.BusDisplay. In CircuitPython 10.0.0 the deprecated bindings will be removed.

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 code.circuitpython.org or 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-C2, ESP32-C3, ESP32-C6
• nordic: Nordic nRF52840, nRF52833
• raspberrypi: Raspberry Pi RP2040, RP2350
• stm: ST STM32F4 chip family

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

• analog: Analog Devices MAX32690
• broadcom: Raspberry Pi boards such as RPi 4, RPi Zero 2W
• espressif: ESP32-P4
• litex: fomu
• mimxrt10xx: NXP i.MX RT10xxx
• renode: hardware simulator
• silabs: Silicon Labs MG24 family
• stm: ST non-STM32F4 chip families
• zephyr: multiplatform RTOS: testing with nRF5340, nRF54L15, RA6M5, STM32H7

Changes

Fixes and enhancements

• Fix buffer overflow in deque subscripting. #10380. Thanks @bablokb.
• Support "Spectra6" six-color e-ink displays. #10316. Thanks @bablokb.
• Fix handling of stereo audio within audiodelays.Delay when freq_shift=True. #10252. Thanks @relic-se.

Port and board-specific changes

Analog Devices

Broadcom

Espressif

• Fix memory corruption in I2S audio file pre-loading. #10284. Thanks @bablokb.

i.MX

Nordic

renode

RP2

SAMx

SiLabs

Spresense

STM

Zephyr

Individual boards

• 42. Keebs Frood: update to version 9. #10335. Thanks @piit79.
• Pimoroni Inky Frame 5.7": Fixed reversed board.I2C() SDA/SCL pins. #10279. Thanks @bablokb.
• Pimoroni Inky Frame 7.3": Fixed reversed board.I2C() SDA/SCL pins. #10279. Thanks @bablokb.

Documentation changes

Build and infrastructure changes

Translation additions and improvements

New boards

Known issues

• See https://github.com/adafruit/circuitpython/issues for other issues, including issues still to be addressed for:
  • 9.2.x
  • 9.x.x
  • 10.0.0
  • 10.0.x
  • 10.x.x
  • 11.0.0
  • long term
• Native-code .mpy files are not working. This capability is currently enabled only on the winterbloom_sol board.

Thanks

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