adafruit/circuitpython 9.1.0-beta.0

CircuitPython 9.1.0-beta.0

on GitHub

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 supports BLCK and LRCLK 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, SAMx5x
• cxd56: Sony Spresense
• espressif: Espressif ESP32, ESP32-S2, ESP32-S3, ESP32-C3
• nrf: 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
• silabs: Silicon Labs MG24 family
• stm: 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 for polarity=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: support BLCK and LRCLK in either order. #9097. Thanks @Fabien-Chouteau (@wee-noise-makers).

SAMx

SiLabs

Spresense

STM

Individual boards

• Adafruit ItsyBitsy ESP32: fix board.NEOPIXEL and board.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 to ports/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:
  • 9.0.x
  • 9.1.0
  • 9.x.x
  • long term

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.