This is CircuitPython 10.0.0-beta.0, a beta release for 10.0.0. It has known bugs that wil be fixed before the final release of 10.0.0.

Highlights of this release

• Increase the firmware partition size for ESP32-S2 boards with 4MB flash, allowing more features to be included. This change was made for 4MB flash ESP32-S3 boards in previous releases. Starting with this release, you must now update the TinyUF2 bootloader on all 4MB flash ESP32-S2 and ESP32-S3 boards. See below.
• Fix Espressif pulseio.PulseIn regression.

Incompatibility warnings

• You must update the TinyUF2 bootloader on all ESP32-S2 and ESP32-S3 4MB flash boards to TinyUF2 0.33.0 or later.
  • The CircuitPython UF2 builds for these boards now assume a firmware partition size of 2.8MB (double the old size), as explained here. Updating the TinyUF2 bootloader will update the partition size. Failure to update the bootloader will likely cause a UF2 load to fail: you will remain in the bootloader, with the BOOT drive showing.
  • This bootloader update is only needed for ESP32-S2 and ESP32-S3 boards with 4MB flash boards; other ESP32-S2 and ESP32-S3 boards are fine. This bootloader update is compatible with CircuitPython 9.1.0 and later.
  • The proper updated bootloader will be installed by the "OPEN INSTALLER" buttons on each board download page and is also listed in the bootloader update section on those pages.
  • If you are loading CircuitPython using a .bin file instead of a UF2, the partition table is included in the .bin, and you don't need to do anything.
• synthio.BlockBiquad has been renamed to synthio.Biquad. The old deprecatedsynthio.Biquad has been removed, as well as synthio.Synthesizer.low_pass_filter, synthio.Synthesizer.high_pass_filter, and synthio.Synthesizer.band_pass_filter. Coefficients from biquad_filter_state have been moved into synthio_biquad (biquad_filter_state is still used for input and output state).
• The displayio bindings deprecated in 9.x.x have been removed:
  • busdisplay.BusDisplay replaces displayio.Display.
  • fourwire.FourWire replaces displayio.Fourwire.
  • epaperdisplay.EPaperDisplay replaces displayio.EPaperDisplay.
  • i2cdisplaybus.I2CDisplayBus replaces displayio.I2CDisplay.
• os.uname().sysname and os.uname().nodename now are set to MICROPY_HW_MCU_NAME uniformly across all ports.
• watchdog.WatchDogTimer.deinit() is removed.
• _asyncio removed push_head, push_sorted, pop_head. Ensure you are using the latest version of the asyncio CircuitPython library.
• sys.print_exception() is removed. Use traceback.print_exception() instead. The exception object returned by sys.exc_info() is now a traceback module compatible object.

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, ESP32-H2
• 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 Nordic nRF5340 and nRF54L15, Renesas RA6M5, ST STM32H7

Changes

Fixes and enhancements

Port and board-specific changes

Analog Devices

Broadcom

Espressif

• Revert most of #10397, pulseio.PulseIn DMA support on ESP32-S3, due to regressions. #10470. Thanks @bill88t.
• Expand firmware partition on ESP32-S2 boards, merging with OTA update partition. #10468. Thanks @dhalbert.

i.MX

Nordic

renode

RP2

SAMx

SiLabs

Spresense

STM

Zephyr

Individual boards

• CRCibernetica IdeaBoard: enable BLE. #10467. Thanks @bborncr.

Documentation changes

• Fix example for sdioio. #10464. Thanks @dhalbert.

Build and infrastructure changes

• Fix capitalization of ARM GNU toolchain download tar file for .devcontainer. #10477. Thanks @bablokb.

Translation additions and improvements

• Thanks for translations:
  • @hexthat (Chinese - Hanyu Pinyin)
  • @rnirthe (Dutch)

New boards

• Elecrow CrowPanel. #9883. Thanks @ddrown.
• Noise Nugget 2040. #10369. Thanks @wee-noise-makers.
• Omnimo-nRF52840. #10056. Thanks @OmarEMbed.
• Unexpected Maker EdgeS3D. #10476. Thanks @UnexpectedMaker.

Known issues

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