This isCircuitPython 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. Seethese instructions for updating your bootloader.

Highlights of this release

• Fixdeque bug.
• Fix I2S audio file read causing memory corruption.
• Support "Spectra6" six-color e-ink displays.
• Fixaudiodelays.Delay whenfreq_shift=True.
• Board fixes.

Incompatibility warnings

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

Download from circuitpython.org

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

Installation

To install follow the instructions in theWelcome to CircuitPython! guide. To install the latest libraries, seethis page in that guide.

Trycode.circuitpython.org orthe 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 inreadthedocs.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 indeque subscripting.#10380. Thanks@bablokb.
• Support "Spectra6" six-color e-ink displays.#10316. Thanks@bablokb.
• Fix handling of stereo audio withinaudiodelays.Delay whenfreq_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 reversedboard.I2C() SDA/SCL pins.#10279. Thanks@bablokb.
• Pimoroni Inky Frame 7.3": Fixed reversedboard.I2C() SDA/SCL pins.#10279. Thanks@bablokb.

Documentation changes

Build and infrastructure changes

Translation additions and improvements

New boards

Known issues

• Seehttps://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 filesare not working. This capability is currently enabled only on thewinterbloom_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 theDiscord chat to collaborate.

Contributors