CircuitPython 8.2.6 Released! @circuitpython

From the GitHub release page:

This is CircuitPython 8.2.6, 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. The 8.2.0 firmware is larger than what the bootloader can handle. See these instructions for updating your bootloader.

Notable changes to 8.2.6 since 8.2.5

  • Updated TLS root certificates to support servers using Let’s Encrypt.

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 8.2.5

Fixes and enhancements

  • Add TLS root certificate to handle servers using Let’s Encrypt. #8386. Thanks @dhalbert.
  • Make SSLContext.load_verify_locations() not require keyword argument. #8392. Thanks @dhalbert.

Port and board-specific changes

Broadcom

Espressif

i.MX

nRF

  • Revert #8089: nRF UART sleep power saving. #8391. Thanks @dhalbert.

RP2040

SAMx

SiLabs

Spresense

STM

Individual boards

Documentation changes

Build and infrastructure changes

Translation additions and improvements

New boards since 8.2.5

Known issues

  • ESP32-S3 has significant issues with I2C devices that sleep or use clock stretching. Retry operations on these devices as necessary, or use ESP32-S2 boards.
  • Espressif boards have ESP-IDF storage leaks and occasionally crash after extended WiFi use.
  • 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 8.2.5, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.


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