This is CircuitPython 9.2.7, 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

• Bug 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 TileGrid.contains() when used with subclasses of TileGrid. #10192. Thanks @FoamyGuy.
• Allow terminalio.Terminal with height of 1. #10210. Thanks @FoamyGuy.
• Fix regression that did not treat MP3 samples as signed. #10185. Thanks @jepler.
• Correct len() of a keypad.EventQueue. #10184. Thanks @dhalbert.
• Disallow identical left and right channel pins in audioio.AudioOut. #10182. Thanks @dhalbert.
• Fix regression that did not allow reading what was in a usb_cdc.Serial buffer when USB was disconnected. #10177. Thanks @Neradoc.

Port and board-specific changes

Analog Devices

Broadcom

Espressif

• Guard against multiple deinit of PulseIn and PulseOut objects. #10190. Thanks @eightycc.
• Work around ESP-IDF bug that randomly swaps left and right channels in audioio.AudioOut. #10182. Thanks @dhalbert.

i.MX

Nordic

renode

RP2

• Fix pin validation for analogbufio.BufferedIn on RP2350B. #10202. Thanks @dhalbert.
• Disallow using board.A3 (GPIO29) with analogbufio.BufferedIn on CYW43 boards. #10202. Thanks @dhalbert.
• Use -isystem to simplify including the correct header files for raspberrypi builds. #10188. Thanks @jepler.
• Add -Wype-limits gcc warnings, and fix them. #10187. Thanks @jepler.
• Fix multiple PIO issues. #10186. Thanks @eightycc.

SAMx

SiLabs

Spresense

STM

Zephyr

Individual boards

• Waveshare ESP32-C6 LCD 1.47: fix NeoPixel colors. #10204. Thanks @Neradoc.

Documentation changes

Build and infrastructure changes

• Correct and clean up .pre-commit-config.yaml. #10205. Thanks @dhalbert.

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.