From the GitHub release page:
This is CircuitPython 9.1.0-beta.0, a beta for CircuitPython 9.1.0, and is a new unstable release. This release has known bugs that will be addressed before 9.1.0 final.
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.
Notable changes since 9.0.0
Audio
- RP2040
I2SOut
supportsBLCK
andLRCLK
in either order.
Built-in modules
- Enhance
collections.deque
functionality. - Add
keypad_demux.DemuxKeyMatrix
: use multiplexer for one side of a keypad matrix. - Add integration-based debouncing to
keypad
.
Internal
- Espressif: update to ESP-IDF v5.2.1.
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 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-C3nrf
: Nordic nRF52840, nRF52833raspberrypi
: Raspberry Pi RP2040stm
: 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 2Wlitex
: fomumimxrt10xx
: NXP i.MX RT10xxxsilabs
: Silicon Labs MG24 familystm
: ST non-STM32F4 chip families
Changes since 9.0.0
Fixes and enhancements
- Turn off
displayio
warnings noting name changes since 8.x.x. #9100, #9096. Thanks @dhalbert. - Fix
bitbangio.SPI
idle polarity forpolarity=1
. #9075. Thanks @kbsriram. - Enhance
collections.deque
functionality. #9065. Thanks @SAK917. - Add
keypad_demux.DemuxKeyMatrix
: use multiplexer for one side of a keypad matrix. #9035. Thanks @CDarius. - Add integration-based debouncing to
keypad
. #8855. Thanks @xs5871.
Port and board-specific changes
Broadcom
Espressif
- Update ESP-IDF to v5.2.1. #9071. Thanks @tannewt.
i.MX
nRF
RP2040
- Implement
Socket.setsockopt(SOL_SOCKET, SO_REUSEADDR)
for Pico W. #9100, #9084. Thanks @jepler. I2SOut
: supportBLCK
andLRCLK
in either order. #9097. Thanks @Fabien-Chouteau (@wee-noise-makers).
SAMx
SiLabs
Spresense
STM
Individual boards
- Adafruit ItsyBitsy ESP32: fix
board.NEOPIXEL
andboard.NEOPIXEL_POWER
pin assignments. #9100, #9087. Thanks @RetiredWizard. - Adafruit Trinkey SHT4x: fix
board.I2C()
pins. #9108, #9107. Thanks @dhalbert and @BlitzCityDIY.
Documentation changes
- Update
busdisplay.BusDisplay
example. #9100, #9070. Thanks @FoamyGuy.
Build and infrastructure changes
- Do not include PICODVI-related sources if
CIRCUITPY_PICODVI = 0
. #9099. Thanks @bablokb. - Fix compile error when
CIRCUITPY_USB_HOST = 0
. #9091. Thanks @bablokb. - Update GitHub codespaces devcontainers. #9068. Thanks @bablokb.
- Rename
ports/nrf
toports/nordic
to avoid overlap with MicroPython. #9062. Thanks @dhalbert.
Translation additions and improvements
- Thanks for translations:
- @wtuemura (Portuguese – Brazil)
New boards since 9.0.0
- M5Stack CoreS3. #9093. Thanks @CDarius.
- RF.Guru MicroPico. #9095. Thanks @ure (@Guru-RF).
- Sunton ESP32-2432S028. #9092. Thanks @SeanTheITGuy.
- Waveshare ESP32-S3 GEEK. #9076. Thanks @kylefmohr.
Known issues
- See https://github.com/adafruit/circuitpython/issues for other issues, including issues still to be addressed for:
Thanks
Thank you to all who used, tested, and contributed since 9.0.0, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.