This is CircuitPython 7.2.1, the latest bugfix revision of CircuitPython, and is a new stable release.
Notable fixes to 7.2.1 since 7.2.0
Espressif I2C pull-up detection fix.
SAMD21 auto-reload reliability. In addition, for auto-reloads on any board, the program will stop more quickly, and will wait 0.75 seconds (was 0.5 seconds) after the last filesystem write before restarting.
Update known certificates.
Fix countio problems when used outside of code.py.
Add from __future__ import annotations to allow program compatibility with CPython.
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.
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-S3, ESP32-C3
mimxrt10xx: NXP i.MX RT10xxx
stm: ST non-STM32F4 chip families
Changes since 7.2.0
Fixes and enhancements
Update certificates. #6139 (backport of #6097). Thanks @FoamyGuy and @dhalbert.
Add do-nothing from __future__ import annotations. #6137 (backport of #6117). Thanks @dhalbert.
Port and board-specific changes
Fix I2C pull-up detection. #6129. Thanks @prplz.
Make countio.Counter be long-lived, for implementation reasons. #6138 (backport of #6106). Thanks @DavePutz and @dhalbert.
SAMD21: Auto-reload was not working reliably. #6142, #6132. Thanks @dhalbert.
New boards since 7.2.0
See https://github.com/adafruit/circuitpython/issues for other issues, including issues still to be addressed for 7.x.x.
Thank you to all who used, tested, and contributed since 7.2.0, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.
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