adafruit/circuitpython 9.2.0-alpha.2350 on GitHub

This is CircuitPython 9.2.0-alpha.2350, the first unstable release of 9.2.0. It likely contains bugs. It features support for the new Raspberry Pi microcontroller called the RP2350.

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.

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, 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
stm: 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 2W
litex: fomu
mimxrt10xx: NXP i.MX RT10xxx
renode: hardware simulator
raspberrypi: Raspberry Pi RP2350
silabs: Silicon Labs MG24 family
stm: ST non-STM32F4 chip families

Changes since 9.1.1

Fixes and enhancements

Add double buffering to RawSample by @timchinowsky in #9421
9.1.x: Warn on use of nonstandard sys.format_exception by @dhalbert in #9457
displayio.Bitmap is now byte-aligned for depth < 8 by @deshipu in #9479

Port and board-specific changes

Broadcom

Espressif

Add IPv6 support for Espressif by @jepler in #9436
espressif: enable PCNT accumulator for Counter, FrequencyIn, Incremental Encoder by @vickash in #9461
Add wifi.radio.listen_interval to ESP32-family chips. by @EternityForest in #9476

i.MX

Nordic

bleio_user_reset(): check if BLE running before doing any BLE ops by @dhalbert in #9453

Renode

Raspberry Pi

Add support for the new RP2350 by @tannewt in #9490
Add looping to rp2040 analogbufio.BufferedIn by @timchinowsky in #9438

SAMx

SiLabs

Spresense

STM

Individual boards

Extend board driver support for SSD1681 by @bradanlane in #9456

Documentation changes

Update Standard Library sys documentation by @RetiredWizard in #9427
Only use pyi files for autoapi doc generation by @jepler in #9466
Mailmap by @rpavlik in #9462

Translation additions and improvements

New boards since 9.1.1

VIDI X board by @lovrojakic in #8798
Waveshare RP2040 One by @johnnohj in #9484
Adafruit Feather RP2350 by @tannewt
Adafruit Metro RP2350 by @tannewt
Cytron Motion 2350 Pro by @SalamCytron
Raspberry Pi Pico 2 by @tannewt
Solder Party RP2350 Stamp by @arturo182
Solder Party RP2350 Stamp XL by @arturo182

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 9.1.0, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.