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).
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:
atmel-samd: Microchip SAMD21, SAMx5x
cxd56: Sony Spresense
espressif: Espressif ESP32-S2
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
espressif: ESP32, ESP32-S3, ESP32-C3
litex: fomu
mimxrt10xx: NXP i.MX RT10xxx
stm: ST non-STM32F4 chip families
Changes since 8.0.2
Fixes and enhancements
Fix missing internal initialization of display.ColorConverter objects. #7611. Thanks @gamblor21.
Port and board-specific changes
RP2040
Correct error reporting in SSLSocket. #7632. Thanks @jepler.
Increase number of lwip timers for mDNS. #7589. Thanks @gneverov.
SAMx
Fix pad assignments for busio.UART and improve pin validation. #7616. Thanks @dhalbert.
Documentation changes
Fix duplicate ulab entry in help("modules"). #7601. Thanks @jepler.
Build and infrastructure changes
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:
Thank you to all who used, tested, and contributed since 8.0.2, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.
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