adafruit/circuitpython 10.3.1

CircuitPython 10.3.1

on GitHub

This is CircuitPython 10.3.1, a bugfix revision of CircuitPython, and is a new stable release.

Highlights of changes since 10.3.0

• Allow importing turbo (@viper and @native) .mpy files on RP2xxx boards. More to come.
• Espressif ESP32-C5 support.
• Espressif and nordic BLE fixes that improve BLE workflow.
• Many other bug fixes.
• Many build infrastructure improvements and speedups.

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, SAMx5x
• cxd56: Sony Spresense
• espressif: Espressif ESP32, ESP32-C2, ESP32-C3, ESP32-C5, ESP32-C6, ESP32-C61, ESP32-H2, ESP32-S2, ESP32-S3
• nordic: Nordic nRF52840, nRF52833
• raspberrypi: Raspberry Pi RP2040, RP2350
• stm: ST STM32F4 chip family

These ports are considered alpha and will have bugs and missing functionality:

• analog: Analog Devices MAX32690
• broadcom (will be removed in CircuitPython 11): Raspberry Pi boards such as RPi 4, RPi Zero 2W
• espressif: ESP32-P4
• litex: fomu
• mimxrt10xx: NXP i.MX RT10xxx
• renode: hardware simulator
• silabs: Silicon Labs MG24 family
• stm: ST non-STM32F4 chip families
• zephyr: multiplatform RTOS, running on multiple chip families

Changes since 10.3.0

Fixes and enhancements

• Keep serving web workflow after a watchdog reset. #1337. Thanks @grgrant.
• Add a guard service to BLE workflow services so user-created services won't cause problems. #11333. Thanks @dhalbert.
• Allow loading "turbo" (native and viper) .mpy files without adding the @native and @viper compilers. #11332, #11331. Thanks @mikeysklar.
• Fix WaveFile 8-bit sample padding at end of file. #11320. Thanks @4RH1T3CT0R7.
• Validate epoch_time in TimeAlarm. #11318. Thanks @4RH1T3CT0R7.
• Allow scanning 5 GHz WiFi channels on dual-band boards. #11308. Thanks @mikeysklar.
• Validate passed display in picogame. #11306. Thanks @lynt-smitka.
• Add freeze property to audiodelays.PitchShift. #11293. Thanks @relic-se.
• Fix dirty-rectangle checks in picogame. #11290. Thanks @lynt-smitka.
• Fix dropped note when re-pressed after decay in synthio #11289. Thanks @bdbarnett.
• Fix regression in LED status code display. #11288. Thanks @dhalbert.
• usb_hid: honor boot protocol request that arrives after startup. #11282. Thanks @mikeysklar.
• Fix synthio Biquad filter reset. #11278. Thanks @bdbarnett.
• Fix audiofilters.Distortion(soft_clip=False). #11277. Thanks @bdbarnett.
• Fix synthio oscillator wrapping one sample late. #11276. Thanks @bdbarnett.
• Fix synthio Biquad filter computation. #11275. Thanks @bdbarnett.
• Mark usb_audio.Speaker OUT adaptive so Windows UAC2 driver can start. #11256. Thanks @jbirchall-svg.

Port and board-specific changes

Analog Devices

Broadcom

Espressif

• Fix touchio.TouchIn regression. #11307. Thanks @dhalbert.
• Don't run out of space for BLE CCCDs. #11304. Thanks @dhalbert.
• Don't drop Characteristic.value notifications under load. #11301. Thanks @dhalbert.
• Add ESP32-C5 support. #11297. Thanks @mikeysklar.
• Don't lose _bleio.PacketBuffer data when buffers are temporarily not available. #11286. Thanks @dhalbert.
• Don't clear sleep memory after a reload; only clear after hard reset. #11274. Thanks @mikeysklar.

i.MX

Nordic

• Fix hardcrash when activating watchdog in boot.py. micropython#11925. Thanks @FoamyGuy.
• Add emmcio module, currently only used for Teenage Engineering SP-1. #11257. Thanks @FoamyGuy.

renode

RP2xxx

• Fix mDNS WiFI hostname. #11035. Thanks @grgrant.

SAMx

SiLabs

Spresense

STM

• Make entering bootloader more robust by retrying. #11270. Thanks @mikeysklar.

Zephyr

• nrf7002dk: give slot0 the unused 32 kB storage partition. #11335. Thanks @mikeysklar.
• RP2xxx: make nvm size be a whole erase block. #11272. Thanks @lynt-smitka.
• Build changes:
  • Build translations more selectively. #11336. Thanks @lynt-smitka.
  • Run tests only when a change can reach them. #11327. Thanks @lynt-smitka.
  • Allow display capture tests to stop the simulator after the last display write. #11323. Thanks @lynt-smitka.
  • Add asan native_sim build. #11317. Thanks @tannewt.
  • Install 32-bit SDL2 packages only for native_sim. Thanks @lynt-smitka.
  • Use Python 3.13 for board jobs because wheels do not yet exist for some 3.14 packages. #11312. Thanks @lynt-smitka.
  • Check that zephyr board firmware layouts match the non-zephyr builds for those boards. #11310. THanks @lynt-smitka.
  • Use dummy SDL video driver for native_sim. #11303. Thanks @tannewt.
  • Use autogen for emmcio, picogame, board. #11296. Thanks @tannewt.
  • Run tests in their own workflow. #11294. Thanks @mikeysklar.
  • Increase timeouts for test_saved_word test. #11280. Thanks @dhalbert.
  • Add partition layout check. #11273. Thanks @lynt-smitka.
  • Add ranges to partitions node. #11271. Thanks @lynt-smitka.
  • Ignore more file changes that don't affect board builds. #11264. Thanks @tannewt.

Individual boards

• Pajenicko PicoPad: Use 62.5 MHz for display SPI frequency. #11291. Thanks @lynt-smitka.

Documentation changes

Build and infrastructure changes

• Run zephyr tests as three jobs, to improve parallelism. #11350. Thanks @lynt-smitka.
• Add lib/mp3 as a dependency for mimxrt10xx in ci_fetch_deps.py. #11346. Thanks @lynt-smitka.
• Get ninja from ESP-IDF tools instead of fetching it again with apt. #11343. Thanks @lynt-smitka.
• Fix unix coverage build on arm64. #11330. Thanks @4RH1T3CT0R7.
• Predict translation sizes to avoid needing to build translations that will not overflow during PR runs. #11326. Thanks @lynt-smitka.
• Split ports with more than 256 board jobs into several matrix jobs. #11325. Thanks @lynt-smitka.
• Build firmware.size.json in all cases now. #11314. Thanks @lynt-smitka.
• use -j$(nproc) for make parallelism. #11313. Thanks @lynt-smitka.

Translation additions and improvements

New boards

• Challenger RP2040 NFC. #11321. Thanks @TheFilipcom4607.
• Espressif ESP32-C5-DevKitC-1-N8R8. #11297. Thanks @mikeysklar.
• Teenage Engineering SP-1. #11298, #11261. Thanks @FoamyGuy.

Known issues

• See https://github.com/adafruit/circuitpython/issues for other issues, including issues still to be addressed for:
  • 10.3.x
  • 10.x.x
  • 11.0.0
  • long term

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.