This is CircuitPython 9.2.1, 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
- Additional
synthio
andaudiofilters
functionality. I2CTarget
andkeys.*.reset()
fixes.- RP2350: PSRAM and
cpu.temperature
fixes. rp2pio
: add background read operation.- Five new boards.
Incompatibility warnings
- Raise
TypeError
when attempt to produce JSON for invalid types. Previously the types were serialized as strings.
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, SAMx5xcxd56
: Sony Spresenseespressif
: Espressif ESP32, ESP32-S2, ESP32-S3, ESP32-C2, ESP32-C3, ESP32-C6nordic
: Nordic nRF52840, nRF52833raspberrypi
: Raspberry Pi RP2040, RP2350stm
: 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 2Wespressif
: ESP32-P4 (currently no USB support)litex
: fomumimxrt10xx
: NXP i.MX RT10xxxrenode
: hardware simulatorsilabs
: Silicon Labs MG24 familystm
: ST non-STM32F4 chip families
Changes since 9.2.0
Fixes and enhancements
- Fix regression of
keypad.*.reset()
behavior. #9819. Thanks @aseanwatson and @dhalbert. - Add finaliser to
I2CTarget
to fix problems on soft retart. #9810. Thanks @dhalbert. - Raise
TypeError
when attempt to produce JSON for invalid types. #9789. Thanks @jepler. - Add
synthio.BlockInput
support tosynthio.Note
waveform loop parameters. #9788. Thanks @relic-se. - Supply silence when sample missing in
audiofilters.Filter
. #9787. Thanks @relic-se. - Force reboot to normal mode after
storage.erase_filesystem()
. #9786. Thanks @bill88t. - Add support for tuple of
Biquad
objects withinaudiofilters.Filter
. #9772. Thanks @relic-se. synthio
: Add a form of biquad filter,BlockBiquad
, that usesBlockInput
. #9756. Thanks @jepler.
Port and board-specific changes
Broadcom
Espressif
i.MX
nordic
renode
RP2
- Fix serial REPL bootloop. #9799. Thanks @eightycc.
- Avoid
mbedtls
function that exists only on RP2040. #9792. Thanks @jepler. - Fix
cpu.temperature
on RP2350. #9784. Thanks @bablokb. - Flush cache properly when PSRAM is in use on RP2350. #9783. Thanks @dhalbert.
- Update
cyw43-driver
module to matchpico-sdk
2.0.0. #9775. Thanks @eightycc. - Add
rp2pio
background read operation. #9659. Thanks @timchinowsky.
SAMx
SiLabs
Spresense
STM
Individual boards
- LILYGO T-Deck (Plus): improve port, add support for variant "Plus" functionality. #9815. Thanks @bill88t.
- LILYGO TEMBED ESP32S3: fix display initialization sequence. #9650. Thanks @bytiful.
- Meowbit: enabled
gifio
, and disable other modules unlikely to be used to make room. #9761. Thanks @dglaude. - Pimoroni Pico Plus 2: rework pin names. #9803. Thanks @bablokb.
- WIZnet W5100S EVB Pico: Add
ssl
. #9791. Thanks @anecdata.
Documentation changes
- Fix typo in
BusDisplay
parameters. #9806. Thanks @RetiredWizard.
Build and infrastructure changes
- Make default
unix
variant becoverage
. #9796. Thanks @jepler. - Add
audiodelays
andaudioeffects
tounix
coverage port. #9793. Thanks @jepler. - Fix security issues in GitHub Actions found by
zizmor
. #9785. Thanks @jepler. - Check for proper gcc version when building. #9779. Thanks @jepler.
- Enable
vectorio
incoverage
build. #9766. Thanks @jepler.
Translation additions and improvements
- Thanks for translations:
New boards since 9.2.0
- 0xCB Gemini. #9801. Thanks @0xCB-dev.
- Bradán Lane STUDIO Coin M0. #9797. Thanks @bradanlane.
- Raspberry Pi Pico 2 W. #9817. Thanks @jepler.
- SparkFun Thing Plus RP2350. #9812. Thanks @sparkfun.
- WIZnet W5100S EVB Pico2. #9791. Thanks @anecdata.
Known issues
- See https://github.com/adafruit/circuitpython/issues for other issues, including issues still to be addressed for:
- 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.