CircuitPython 7.2.0 Alpha 1 Released! @circuitpython

From the GitHub release page:

This is CircuitPython 7.2.0-alpha.1, the first published alpha release for CircuitPython 7.2.0. It is relatively stable, but there will be further additions and fixes before final release.

Notable additions to 7.2.0 since 7.1.0

  • Continuing work on Raspberry Pi Broadcom board support.
  • Espressif ESP32-S3 support.
  • RP2040 PIO sideset support.

Download from

Firmware downloads are available from the downloads page on The site makes it easy to select the correct file and language for your board.


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).

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, atmel-samd, cxd56 (Spresense), esp32s2, nrf,raspberrypi, stm for the F4 family are stable. stm for other STM chip families is being actively improved but may be missing functionality and have bugs. broadcom (Raspberry Pi), litex and mimxrt10xx are in an alpha state and will have bugs and missing functionality.

Changes since 7.1.x branch

Fixes and enhancements

  • Update frozen libraries. #5789, #5778, #5773. Thanks @dhalbert.
  • Go into safe mode if CIRCUITPY drive is unavailable. #5785. Thanks @dhalbert.
  • displayio.Tilegrid: add width, height, tile_width, tile_height attributes. #5749. Thanks @FoamyGuy.
  • Update ulab. #5747, #5740. Thanks @jepler.
  • adafruit_pixelbuf: fix off-by-one errors. #5746. Thanks @dunkmann00.
  • vectorio: support 32-bit color. #5728. Thanks @tannewt.
  • wifi.SSLContext improvements. #5716. Thanks @timhawes.
  • wifi.SSLSocket: fix error checking. #5714. Thanks @timhawes.
  • vectorio.Rectangle: add width and height. #5709. Thanks @WarriorOfWire.
  • sdcardio fix. #5694, #5688. Thanks @jepler.
  • Fix _bleio HCI support. #5686, #5683. Thanks @dhalbert.
  • Update _stage to avoid backlight problems. #5686, #5657. Thanks @deshipu.

Port and board-specific changes


  • Allow long integers. #5774. Thanks @RetiredWizard.
  • Add NeoPixel support. #5727. Thanks @tannewt.
  • busio.SPI support. #5698. Thanks @tannewt.
  • Full busio.UART support. #5676. Thanks @tannewt.


  • Add distinct UF2 family ID for ESP32-S3. #5771. Thanks @hathach.
  • Update protomatter and reenable RGBMatrix. #5744. Thanks @jepler.
  • Choose SPI channel automatically. #5660. Thanks @jepler.
  • Update ESP-IDF to v4.4; add ESP32-S3 support; temporarily diable RGBMatrix. #5615. Thanks @microDev1.


  • Add a distinct UF2 family ID for nRF52833 boards. #5775. Thanks @jpconstantineau.


  • Add sideset enable support to PIO. #5766. Thanks @tannewt.
  • Protect nvm writes from interrupts. #5686, #5663. Thanks @FoamyGuy.
  • Use longer clock-stretch timeout for RP2040 zero-byte I2C writes. #5686, #5656. Thanks @dhalbert.
  • Use proper slice number for PWMOut. #5686, #5667. Thanks @dhalbert.
  • RGBMatrix: clear interrupt when freeing timer. #5789, #5613. Thanks @jepler and @DavePutz.


  • Fix SAMD TAMPER interrupt clearing in PinAlarm; fixes some second-order bugs, including in displayio. #5747, #5708. Thanks @dhalbert.
  • Fix FrequencyIn. #5686, #5665. Thanks @dhalbert.

Individual boards

  • Adafruit Feather ESP32-S2: turn on I2C power by default. #5789, #5779, #5776. Thanks @ladyada and @dhalbert.
  • Adafruit Feather ESP32-S2 TFT: fix color order. #5742. Thanks @ladyada.
  • Adafruit Feather ESP32-S2 TFT: fix pin assignments. #5738. Thanks @ladyada.
  • Adafruit KB2040: add CLK pin to match silkscreen. #5735. Thanks @tannewt.
  • Adafruit QT Py ESP32-S2: fix pin assignments. #5738. Thanks @ladyada.
  • Espressif ESP32-S3-Box-2.5 and ESP32-S3-DevkitC-1-nopsram: fix USB PIDs. Thanks @jepler.
  • MakerDiary nRF52840 MDK USB Dongle: fix pin assignments. #5729. Thanks @asura99.

New boards since 7.1.0

  • Espressif ESP32-S3 Box. #5691, #5674, #5661. Thanks @jepler.
  • Espressif ESP32-S3 DevKit C-1. #5655. Thanks @jepler.
  • Espressif ESP32-S3 DevKit C-1-nopsram. #5691, #5655. Thanks @jepler.
  • JPConstantineau BlueMicro833. #5664. Thanks @jpconstantineau.
  • JPConstantineau PyKey 18 Numpad. #5699. Thanks @jpconstantineau.
  • JPConstantineau PyKey 44 Ergo. #5699. Thanks @jpconstantineau.
  • JPConstantineau PyKey 60. #5699. Thanks @jpconstantineau.
  • JPConstantineau PyKey 87 TKL. #5699. Thanks @jpconstantineau.
  • Oak Development Technologies Cast-Away RP2040. #5666. Thanks @skerr92.
  • Pimoroni Tiny 2040 (2MB). #5684. Thanks @ZodiusInfuser.
  • Seeeduino Xiao nRF52840. #5753. Thanks @0hotpotman0.
  • Seeeduino Xiao RP2040. #5696, #5519. Thanks @jpconstantineau and @prplz.
  • SparkFun Thing Plus STM32. #5597. Thanks @NathanY3G.

Documentation changes

  • Fix typo in rp2pio. #5764. Thanks @dannystaple.
  • Use circuitpython_typing instead of _typing for type annotations. #5760. Thanks @jepler.
  • Update version of Sphinx. #5760. Thanks @jepler.
  • Fix stubs for adafruit_bus_device by redoing directory structure to match module. #5786. Thanks @prplz.
  • Add protocol definition for fonts for type annotations. #5759. Thanks @jepler.

Build and infrastructure changes

  • Refactor longint compile-time flags. #5783. Thanks @jepler.
  • Use Python version “3.x” in CI actions. #5752. Thanks #jepler.
  • circuitpython-org now uses main. Check that branch for updates. #5747, #5712. Thanks @jepler.
  • Don’t rebuild boards on CI script changes. #5702. Thanks @tannewt.
  • Add adabot submodule as requirement for website PR action. #5701. Thanks @tannewt.
  • Partial submodule fetching using sha. #5687, #5686, #5681. Thanks @tannewt.
  • Update file formatting due to blacken and uncrustify updates. #5686, #5670, #5669. Thanks @hdalbert.
  • Automatically notify @v923z of ulab updates. #5653. Thanks @tannewt.

Translation additions and improvements

  • Fix French translation issue. #5710. Thanks @jepler.
  • Thanks for translations:
    • @bergdahl (Swedish)
    • @dronecz (Czech)
    • @hexthat (Chinese – Pinyin)
    • @Pixel-Clay (Russian)
    • @wtuemura (Portuguese – Brazil)

Known issues


Thank you to all who used, tested, and contributed, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

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