This is CircuitPython 10.3.0, a minor revision of CircuitPython, and is a new stable release.
Notable additions, changes, and fixes in 10.3.0 from 10.2.1
Gaming and Display
picogamegame engine module, a performant game-oriented alternative todisplayio.- E-ink display quality improvements, including on MagTag 2025.
Audio
audio.AudioOut, using DAC, now available on STM.audio_i2sin, available on Espressif and RP2xxx.audiofilewriter, to send an audio pipeline stream to a file.audiodelays.Flanger,audiodelays.GranularPitchShift.audiospeed.Resampler.audiodelays,audiofilters, andaudiofreeverbnow available on RP2xxx.synthio.Biquadfilters now available inaudiodelays.Echoandaudiofreeverb.Freeverb.usb_audio.USBMicrophoneandusb_audio.USBSpeaker, which provide audio source and sink USB devices.- Duplex I2S.
settings.toml
CIRCUITPY_BLE_WORKFLOWtoggle.CIRCUITPY_HEAP_SRAM_SIZE.CIRCUITPY_SAFE_MODE_DELAYtime value.CIRCUITPY_SDCARD_USBtoggle.CIRCUITPY_WIFI_HOSTNAME.- Float values can now be specified.
Storage
sdioionow available on RP2xxx.storage.unsafe_disable_usb_drive()can disable the USB CIRCUITPY drive after the host has mounted it.
Fixes
- ESP-NOW works again.
- USB host fixes.
- BLE workflow fixes (more to come).
Highlights of changes since 10.3.0-rc.0
- Fix build failures.
- Update RP2350 PSRAM timing when processor frequency changes.
Incompatibility warnings when upgrading to 10.3.0 from 10.2.1
- The
baudratespecified inbusio.SPI.configure()is now a ceiling, and will not be exceeded. Previously, on some ports, the actual baudrate chosen could have been the nearest available baudrate, but higher than the specified baudrate, sometimes by a substantial amount. UseSPI.frequencyto fetch the actual baudrate. Limitations: On Zephyr,SPI.frequencyis the specified, not the actual baudrate, and some Zephyr ports may violate the ceiling behavior.
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 code.circuitpython.org or 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, SAMx5xcxd56: Sony Spresenseespressif: Espressif ESP32, ESP32-C2, ESP32-C3, ESP32-C6, ESP32-C61, ESP32-H2, ESP32-S2, ESP32-S3nordic: Nordic nRF52840, nRF52833raspberrypi: Raspberry Pi RP2040, RP2350stm: ST STM32F4 chip family
These ports are considered alpha and will have bugs and missing functionality:
analog: Analog Devices MAX32690broadcom(will be removed in CircuitPython 11): Raspberry Pi boards such as RPi 4, RPi Zero 2Wespressif: ESP32-P4litex: fomumimxrt10xx: NXP i.MX RT10xxxrenode: hardware simulatorsilabs: Silicon Labs MG24 familystm: ST non-STM32F4 chip familieszephyr: multiplatform RTOS, running on multiple chip families
Changes since 10.3.0-rc.0
Fixes and enhancements
Port and board-specific changes
Analog Devices
Broadcom
Espressif
i.MX
Nordic
renode
RP2xxx
SAMx
SiLabs
Spresense
STM
Zephyr
Individual boards
Adafruit PyBadge: shrink build. #11263. Thanks @dhalbert.
Documentation changes
Build and infrastructure changes
Translation additions and improvements
New boards
Known issues
- 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 toward this release, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.