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
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
Correct error reporting in SSLSocket. #7632. Thanks @jepler.
Increase number of lwip timers for mDNS. #7589. Thanks @gneverov.
Fix pad assignments for busio.UART and improve pin validation. #7616. Thanks @dhalbert.
Fix duplicate ulab entry in help("modules"). #7601. Thanks @jepler.
Build and infrastructure changes
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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