adafruit/circuitpython 8.2.7 on GitHub

This is CircuitPython 8.2.7, 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 8.2.7 since 8.2.6

Improve RGBMatrix memory allocation tracking to prevent leaks.
Reset MDNS after turning off WiFi.
Three new boards.

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 8.2.6

Fixes and enhancements

Improve RGBMatrix memory allocation tracking to prevent leaks. #8446. Thanks @tannewt.
Allow display.Bitmap value_count to be 65536. #8434. Thanks @rimwolf-redux.
Fix espcamera pin deinit (backport from main). #8393. Thanks @bill88t.

Port and board-specific changes

Broadcom

Espressif

Reset MDNS after turning off WiFi. #8418. Thanks @tannewt.

i.MX

nRF

RP2040

SAMx

On SAMD51G19 boards, which don't have I2S, turn audiobusio off by default. #8414. Thanks @dhalbert.

SiLabs

Spresense

STM

Individual boards

Adafruit Metro S3: correct pins for Rev B. #8459. Thanks @tannewt.
Adafruit Monster M4SK: correct microcontroller chip. #8414. Thanks @dhalbert.
Waveshare ESP32 S3 Pico: correct available pins. #8465, #8463, #8396. Thanks @tirtharajsinha.

Documentation changes

Improve rgbmatrix documentation. #8400. Thanks @jepler.

Build and infrastructure changes

Translation additions and improvements

New boards since 8.2.6

MagiClick S3 n4r2: #8445, #8427. Thanks @MakerM0.
Unexpected Maker Blizzard S3. #8480. Thanks @UnexpectedMaker.
Waveshare RP2040 Touch LCD 1.28. #8475. Thanks @minordemon.

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

adafruit/circuitpython 8.2.7 CircuitPython 8.2.7 on GitHub