CircuitPython 8.1.0 Release Candidate 0

This is CircuitPython 8.1.0-rc.0, a release candidate for 8.1.0. We believe it is stable, and are making a release candidate for further testing before final release.

Notable changes to 8.1.0 since 8.0.0

• Silicon Labs (SiLabs) MG24 microcontroller family port (silabs), contributed by Silicon Labs.
• Add animated GIF support, including palette support: gifio.OnDiskGif.
• Add safemode.py, for programmatic handling of safe mode.
• Add ESP-NOW support on Espressif.
• synthio improvements and new features; API is still experimental and may change after 8.1.0.
• Add picodvi on RP2040: DVI/HDMI framebuffer and displayio support.
• CPU frequency is settable on RP2040.
• Add 7-color e-ink display support.
• Add bitmaptools.drawpolygon().
• Allow setting pystack size in settings.toml.
• Allow static IPv4 addresses for access points.
• Add dither support to Palette.
• Support array.extend(iterable).

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 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-S2, ESP32-S3, ESP32-C3
• 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
• litex: fomu
• mimxrt10xx: NXP i.MX RT10xxx
• silabs: Silicon Labs MG24 family
• stm: ST non-STM32F4 chip families

Changes since 8.1.0-beta.2

Fixes and enhancements

• Fix display object management. #2204. Thanks @furbrain.
• Allow no chip select pin in native adafruit_bus_device.spi_device. #7970. Thanks @dhalbert.
• Continued synthio improvements and fixes. #7969, #7959, #7933, #7862. Thanks @jepler.
• Prevent WiFi workflow background activity if WiFi not connected. #7960. Thanks @thess.
• Improve vectorio.Polygon argument validation. #7947. Thanks @FoamyGuy.
• Support little-endian e-paper displays; fix display memory management. #7891. Thanks @tannewt.

Port and board-specific changes

Broadcom

Espressif

• Improve serial input in ESP32-C3 and similar chips. #7973. Thanks @tannewt.
• Improve debug builds. #7972. Thanks @tannewt.
• Add missing ESP32-S3 microntroller.Pin pins. #7967. Thanks @bojanpotocnik.
• Report actual busio.SPI().frequency. #7963. Thanks @dhalbert.
• Allow static IPv4 for access point. #7946. Thanks @anecdata.
• Fix crash when sending rapid pings. #7938. Thanks @jepler.
• Add documentation that supervisor.next_stack_limit() has no effect. #7914. Thanks @anecdata.

i.MX

• Fix pin pad handling. #7964. Thanks @tannewt.
• Fix regressions, startup and MIDI problems. #7953. Thanks @jepler.
• Update TinyUSB, fix unimplemented Processor routines, script for peripheral generation. #7921. Thanks @tannewt.

nRF

• Implement memorymap. #7942. Thanks @furbrain.

RP2040

• Wait for wifi.radio.stop_station() to complete. #7982. Thanks @bill88t.
• Allow static IPv4 for access point. #7976. Thanks @anecdata.
• picodvi now takes framebuffer resolution instead of output resolution. #7922. Thanks @tannewt.
• Allow setting cpu.frequency. #7430. Thanks @Lanzaa.

SAMx

SiLabs

• Initialize RTC to prevent time crashes. #7939. Thanks @RetiredWizard.

Spresense

STM

• Preserve monotonicity of time routines after RTC date/time change. #7965. Thanks @dhalbert.

Individual boards

• Adafruit Feather RP2040: add board.BUTTON/board.BOOT for GPIO4, for rev D and later boards. #7988. Thanks @Neradoc.
• Adafruit Feather RP2040 ThinkInk: rename board, add board.BUTTON. #7927. Thanks @BlitzCityDIY.
• Sprig Hack Club: add board.DISPLAY. #7958. Thanks @ajs256.

Documentation changes

• Document settings.toml CIRCUITPY_PYSTACK_SIZE. #7951. Thanks @Neradoc.
• Add __contains__() stub to displayio.Group. #7949. Thanks @FoamyGuy.

Build and infrastructure changes

• Update how Python stubs are built. #7957, #7934. Thanks @tekktrik.
• Update shallow clone tag. #7909. Thanks @mjsir911.

Translation additions and improvements

• Thanks for translations:
  • @ChenxiXiao (Chinese - Pinyin)
  • @luisan00 (Spanish)
  • @yutaro Urata (Japanese)

New boards since 8.1.0-beta.2

• Adafruit Feather RP2040 Prop-Maker. #7877. Thanks @dhalbert.
• Lilygo T-Display. #6037. Thanks @erongd.
• NXP IMXRT1015-EVK. #7921. Thanks @tannewt.
• NXP iMXRT RT 1040EVK. #7921. Thanks @tannewt.
• NXP iMXRT RT 1050EVKB. #7921. Thanks @tannewt.
• Pimoroni Inky Frame 5.7. #7962. Thanks @tannewt.
• Pimoroni Badger 2040 W. #7916. Thanks @bablokb.
• Pimoroni Pico DV Demo Base for Pico. #7915. Thanks @RetiredWizard.
• Pimoroni Plasma 2040 W. #7920. Thanks @bablokb.

Known issues

• ESP32-S3 has issues with I2C devices that sleep (LC709203F), use clock stretching, or violate the I2C protocol (e.g., BNO055). Retry operations on these devices as necessary, or use ESP32-S2 boards.
• ESP32-S2 used as an HTTP server may crash after several hours. This is a regression from 7.x.x.
• See https://github.com/adafruit/circuitpython/issues for other issues, including issues still to be addressed for:
  • 8.x.x
  • 9.0.0
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.1.0-beta.2, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

CircuitPython 8.1.0 Beta 2

This is CircuitPython 8.1.0-beta.2, a beta release for CircuitPython 8.1.0, and is a new unstable release.

Notable changes to 8.1.0 since 8.0.0

• Silicon Labs (SiLabs) MG24 microcontroller family port (silabs), contributed by Silicon Labs.
• Add animated GIF support, including palette support: gifio.OnDiskGif.
• Add safemode.py, for programmatic handling of safe mode.
• Add ESP-NOW support on Espressif.
• synthio improvements and new features. API may change before 8.1.0 final.
• Add picodvi on RP2040: DVI/HDMI framebuffer and displayio support.
• Add 7-color e-ink display support.
• Add bitmaptools.drawpolygon().
• Allow setting pystack size in settings.toml.
• Add dither support to Palette.
• Support array.extend(iterable).

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 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-S2, ESP32-S3, ESP32-C3
• 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
• litex: fomu
• mimxrt10xx: NXP i.MX RT10xxx
• silabs: Silicon Labs MG24 family
• stm: ST non-STM32F4 chip families

Changes since 8.1.0-beta.1

Fixes and enhancements

• Remove redundant abs() in vectorio.Circle. #7980. Thanks @FoamyGuy.
• Fix displayio root_group=None documentation. #7899. Thanks @RetiredWizard.
• Fix web-editor debugging on non-standard ports. #7897. Thanks @thess.
• Enforce a minimum 2x2 TileGrid size. #7892. Thanks @FoamyGuy.
• Handle little-endian e-ink displays. Initialize displayio memory. #7891. Thanks @tannewt.
• Add palette support for OnDiskGif. #7878. Thanks @gamblor21.
• Simplify web workflow CORS checks; don't restrict hostnames. #7876. Thanks @thess.
• Improve web workflow static pages. #7869. Thanks @thess.
• Improve displayio arg validation. #7867. Thanks @RetiredWizard.
• Allow 64-character hex WiFi passwords. #7866. Thanks @rich123.
• Improve stuck-low detection on reset in onewireio. #7865. Thanks @CanyonCasa.
• Allow setting web workflow board name in settings.toml. #7846. Thanks @isacben.
• Fix tick handling. #7845. Thanks @tannewt.
• synthio new features and improvements. #7840, #7825. Thanks @jepler.
• Improve web workflow reliability and performance. #7836, #7814. Thanks @thess.
• Add displayio circuitpython_splash to only one group. #7829. Thanks @FoamyGuy.
• Add wifi.radio.connected and wifi.radio.ap_active properties. #7823. Thanks @dhalbert.
• bitmaptools circle support. #7782. Thanks @jposada202020.

Port and board-specific changes

Broadcom

Espressif

• Fix analogbufio attenuation setting and data values. #7879. Thanks @milindmovasha.

i.MX

RP2040

• Fix picodvi.Framebuffer documentation. #7900. Thanks @dglaude.
• Fix idle state handling. #7893. Thanks @tannewt.
• Add picodvi support on RP2040: DVI/HDMI framebuffer and displayio support. #7880. Thanks @tannewt.

SAMx

SiLabs

• Support for SiLabs MG24 BLE boards. #7874, #7833. Thanks @SiliconLabs (@silabs-BelaV, @silabs-ChatNguyen).

Spresense

STM

Individual boards

• Adafruit Feather RP2040 Scorpio: fix NEOPIXEL pin. #7908. Thanks @Neradoc.
• DeneyapKart1A_v2: fix VID and hostname. #7820. Thanks @deneyapkart.
• M5stack Stick-C: pin and initialization fixes. #7818. Thanks @CDarius.
• Seeeduino WIO Terminal: add comments to pins.c. #7889. Thanks @stonehippo.
• SparkFun SAMD51 MicroMod: fix pins. #7849. Thanks @stonehippo.

Documentation changes

• Note that supervisor.next_stack_limit() does nothing on espressif. Thanks @anecdata.
• Fix link to OneWire software reference. #7870. Thanks @CanyonCasa.
• Fix urandom status on nRF; fix broken CoC link. #7852. Thanks @applecuckoo.
• Fix typo in OnDiskGif. #7816. Thanks @dhalbert.

Build and infrastructure changes

• Update and refactor shallow git tag use. #7909. Thanks @mjsir911.
• Do sudo apt-get update before sudo apt-get install when installing prerequisites. #7872. Thanks @dhalbert.
• Fix gcc13 warnings. #7855. Thanks @flom84.
• Improve aesio tests. #7838. Thanks @jepler.
• Sort boards and new languages in circuitpyton.org update PR. #7819. Thanks @jepler.

Translation additions and improvements

• Thanks for translations:
  • @andibing (English - UK)
  • @Atalanttore (German)
  • @bergdahl (Swedish)
  • @hexthat (Chinese - Pinyin)
  • @jposada202020 (Spanish)
  • @wtuemura (Portugese - Brazil)

New boards since 8.1.0-beta.1

• Adafruit Feather RP2040 CAN. #7834. Thanks @dhalbert.
• Adafruit Feather RP2040 Prop-Maker. #7877. Thanks @dhalbert.
• Adafruit Feather RP2040 USB Host. #7835. Thanks @dhalbert.
• M5Stack Core2. #7854. Thanks @CDarius.
• Silabs XG24 Dev Kit. #7874, #7833. Thanks @SiliconLabs (@silabs-BelaV, @silabs-ChatNguyen).
• SiLabs XG24 Explorer Kit. #7874, #7833. Thanks @SiliconLabs (@silabs-BelaV, @silabs-ChatNguyen).
• SparkFun Thing Plus MGM240P. #7874, #7833. Thanks @SiliconLabs (@silabs-BelaV, @silabs-ChatNguyen).
• VCC-GND YD-ESP32-S3 (N16R8). #7844. Thanks @bill88t.
• VCC-GND YD-ESP32-S3 (N8R8). #7844. Thanks @bill88t.
• Waveshare RP2040-LCD-0.96. #7843. Thanks @waptang.

Known issues

• ESP32-S3 has issues with I2C devices that sleep (LC709203F), use clock stretching, or violate the I2C protocol (e.g., BNO055). 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:
  • 8.1.0
  • 8.x.x
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.1.0-beta.1, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

CircuitPython 8.1.0 Beta 1

This is CircuitPython 8.1.0-beta.1, a beta release for CircuitPython 8.1.0, and is a new unstable release.

Notable changes to 8.1.0 since 8.0.0

• Add animated GIF support: gifio.OnDiskGif.
• Add safemode.py, for programmatic handling of safe mode.
• Add 7-color e-ink display support.
• Allow setting pystack size in settings.toml.
• Add dither support to Palette.
• Support array.extend(iterable).
• Add bitmaptools.drawpolygon().
• Add ESP-NOW support on Espressif.

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 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-S2, ESP32-S3, ESP32-C3
• 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
• litex: fomu
• mimxrt10xx: NXP i.MX RT10xxx
• stm: ST non-STM32F4 chip families

Changes since 8.1.0-beta.0

• Handle settings.toml read error properly. #7812, #7810. Thanks @jepler and @dhalbert.
• Handle HID reports from host with no report ID. #7806. Thanks @dhalbert.
• Restart web workflow after deep sleep. #7814. Thanks @thess.
• Add unsigned ints and 64-bit support to msgpack.unpack. #7802. Thanks @Neradoc.
• Fix tricolor EPD support. #7777. Thanks @tannewt.
• Check struct operation argument counts. #7772. Thanks @jepler.
• Improve supervisor.runtime.set_stack_limit() error checking. #7767. Thanks @tannewt.
• Update tinyusb. #7763, #7702. Thanks @dhalbert.
• Correct vectorio location property. #7758. Thanks @jposada202020.
• Rework pystack logic. #7748. Thanks @microdev1.
• Add disk info API to web workflow. #7746. Thanks @FoamyGuy.
• Add deinit() to gifio.OnDiskGif. #7712 Thanks @gamblor21.
• Prevent recursive calls to websocket background task. #7694. Thanks @DavePutz.
• Improve argument validation for aesio.AES.rekey(). #7684. Thanks @isacben.
• Allow background tasks and interrupts during bitmaptools boundary fill. #7678. Thanks @FoamyGuy.
• Fix OnDiskGif delay. #7669. Thanks @dhalbert.
• Improve validation of displayio.Bitmap arguments. #7548. Thanks @FoamyGuy.
• Add bitmaptools.drawpolygon(). #7471. Thanks @matemaciek.

Fixes and enhancements

• Check for read-only display.Bitmap as needed. #7775. Thanks @tannewt.

Port and board-specific changes

Broadcom

Espressif

• Correct ESP32 CPU frequency. #7815. Thanks @bill88t.
• Set socket internally to non-blocking more carefully. #7757, #7679. Thanks @dhalbert.
• Improve board definitions for some ESP32-S3 boards. #7713. Thanks @microdev1.
• Use queue for multi-part SPI transactions. #7686. Thanks @gamblor21.
• Add ESP-NOW support. #7809, #7797, #7470. Thanks @microdev1 and @Neradoc.

i.MX

• Update to NXP SDK repo for builds. #7766. Thanks @tannewt.
• Implement audiobusio.I2SOut #7805, #7764. Thanks @jepler.
• Implement audiobusio.PWMAudioOut #7805, #7785. Thanks @jepler.
• Improve performance. #7724. Thanks @tannewt.
• Add rotaryio.IncrementalEncoder. #7690. Thanks @jepler.
• Fix double-tap to bootloader. #7674. Thanks @jepler.

RP2040

• Don't set tcp_err callback for listen sockets. #7813. Thanks @gneverov.
• Fix socket exception raising. #7779. Thanks @jepler.
• Validate rp2pio.StateMachine.run() program length. #7731. Thanks @kreasteve.
• Update pico-sdk to 1.50; update cyw43-driver to 0.9.0. #7697. Thanks @dhalbert.

SAMx

• Turn off mkfs() for >4GB on all SAMD21 boards to save space and document. #7739. Thanks @dhalbert.
• Run background tasks between chunks of multi-chunk DMA. #7701. Thanks @dhalbert.
• Allow SPI writes >64kB. #7673. Thanks @gamblor21.

Spresense

STM

• Allow specifying crystal drive strength on STM32L4. #7663. Thanks @blues.

Individual boards

• Adafruit Metro M7 1011: swap ESP32 RX and TX pins. #7776. Thanks @dhalbert.
• Benjamin Shockley Fig Pi: update. #7736. Thanks @bwshockley.
• BrainBoardz Neuron: update. #7705. Thanks @BrainBoardz.
• DoIt ESP32 DevKit V1: fix pins. #7719. Thanks @kreier.
• LOLIN S2 Pico: add on-board display support. #7754. Thanks @Neradoc.
• M5stack Stick-C: many fixes and additions. #7818. Thanks @CDarius.
• Swan R5 LSE: increase crystal drive strength. #7663. Thanks @blues.
• Waveshare ESP32-S2-Pico: improve board definition. #7715. Thanks @bill88t.

Documentation changes

• Fix missing jquery in ReadTheDocs. #7799. Thanks @FoamyGuy.
• Fix struct.pack() signature. #7780. Thanks @jepler.
• All builds now have f-strings, so don't need to suggest .format(). #7759. Thanks @jposada202020.
• Correct VfsFat type annotation and signatures. #7755. Thanks @isacben.
• Update gifio.OnDiksGif example. #7737. Thanks @ckartchner.
• Add port-specific modules to board support matrix. #7725. Thanks @dhalbert.
• Fix broken message and fix TimeAlarm signature. #7723. Thanks @dhalbert.
• Document aesio.AES.rekey(). #7684. Thanks @isacben.
• Document how to use OnDiskGif with direct display access. #7816, #7668. Thanks @jepler, @TheKitty, and @dhalbert.

Build and infrastructure changes

• Check a few more files with pre-commit. #7792. Thanks @microdev1.
• Fix checking to run all jobs. #7765. Thanks @microdev1.
• Remove unused submodule usb_descriptor. #7763. Thanks @dhalbert.
• Use blobless partial clone for make fetch-submodules if available. #7788, #7763. Thanks @dhalbert.
• Have CI look for changes in port-specific bindings. #7762. Thanks @microdev1.
• Add codespell to pre-commit, and correct the typos it pointed out. #7751. Thanks @hathach.
• Note in docs that uncrustify 0.75 should not be used. #7717. Thanks @jepler.
• Improve choosing which jobs to run based on commits. #7708. Thanks @microdev1.
• Improve CI run choices. #7704. Thanks @microdev1.
• CI refactoring and improvments. #7676. Thanks @microdev1.

Translation additions and improvements

• Thanks for translations:
  • @Atalanttore (German)
  • @bergdahl (Swedish)
  • @hexthat (Chinese - Pinyin)
  • @jposada202020 (Spanish)
  • @Saentis (German)
  • @wtuemura (Portugese - Brazil)

New boards since 8.1.0-beta.0

• 01Space LCD042. #7760. Thanks @Neradoc.
• Adafruit Feather RP2040 DVI. #7798, #7710. Thanks @PaintYourDragon and @kattni.
• Adafruit Feather RP2040 EPD. #7777. Thanks @tannewt.
• Adafruit Feather RP2040 RFM. #7807. Thanks @kattni.
• Boardsource Block. #7237. Thanks @kdb424.
• Deneyap Kart. #7791, #7783. Thanks @deneyapkart.
• Deneyap Kart 1A. #7791, #7783. Thanks @deneyapkart.
• Deneyap Kart 1A v2. #7791. Thanks @deneyapkart.
• Deneyap Kart G. #7791, #7783. Thanks @deneyapkart.
• Deneyap Mini. #7791. Thanks @deneyapkart.
• Deneyap Mini v2. #7791. Thanks @deneyapkart.
• Lilygo TTGO T-Display. #7750. Thanks @Neradoc.
• Lilygo T-Watch 2020 V3. #7745. Thanks @Neradoc.
• M5Stack AtomS3 Lite. #7801. Thanks @CDarius.

Known issues

• 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:
  • 8.1.0
  • 8.x.x
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.1.0-beta.0, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

CircuitPython 8.0.5

This is CircuitPython 8.0.5, the latest bugfix revision of CircuitPython, and is a new stable release.

Notable changes to 8.0.5 since 7.3.0

See the CircuitPython 8.0.0 release notes for full information about changes in 8.0.x since 7.3.0.

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 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:

• 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
• litex: fomu
• mimxrt10xx: NXP i.MX RT10xxx
• stm: ST non-STM32F4 chip families

Changes since 8.0.4

Fixes and enhancements

• Prevent startup loop when settings.toml is edited. #7810. Thanks @jepler.

Build and infrastructure changes

• Make build_board_info.py fetch files.json properly when it is larger than 1MB. #7728. Thanks @Neradoc and @dhalbert.

Known issues

• 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:
  • 8.1.0
  • 8.x.x
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.0.4, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

CircuitPython 8.0.4

This is CircuitPython 8.0.4, the latest bugfix revision of CircuitPython, and is a new stable release.

Notable changes to 8.0.4 since 7.3.0

See the CircuitPython 8.0.0 release notes for full information about changes in 8.0.x since 7.3.0.

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 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:

• 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
• litex: fomu
• mimxrt10xx: NXP i.MX RT10xxx
• stm: ST non-STM32F4 chip families

Changes since 8.0.3

Fixes and enhancements

• Fix printing of "soft reboot" message. #7654, #7652. Thanks @xorbit.

Port and board-specific changes

Espressif

• Prevent recursive calls during websocket background processing. #7699, #7694. Thanks @DavePutz.
• Set socket to non-blocking more carefully. #7679. Thanks @dhalbert.

Known issues

• 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:
  • 8.1.0
  • 8.x.x
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.0.3, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

CircuitPython 8.1.0 Beta 0

This is CircuitPython 8.1.0-beta.0, a beta release for CircuitPython 8.1.0, and is a new unstable release.

Notable changes to 8.1.0 since 8.0.0

• Add animated GIF support: gifio.OnDiskGif.
• Add safemode.py, for programmatic handling of safe mode.
• Add 7-color e-ink display support.
• Allow setting pystack size in settings.toml.
• Add dither support to Palette.
• Support array.extend(iterable).

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 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-S2, ESP32-S3, ESP32-C3
• 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
• litex: fomu
• mimxrt10xx: NXP i.MX RT10xxx
• stm: ST non-STM32F4 chip families

Changes since 8.0.0

Fixes and enhancements

• Update frozen libraries. #7660. Thanks @dhalbert.
• Fix missing "soft reboot" message after ctrl-D. #7652. Thanks @xorbit.
• Correct error reporting in SSLSocket. #7639, #7632. Thanks @jepler.
• Initial serial earlier in boot process. #7586. Thanks @gneverov.
• Allow setting pystack size in settings.toml. #7585. Thanks @bill88t.
• Deinit the reset pin when displayio.I2CDisplay() fails. #7580, #7563. Thanks @Neradoc.
• Improve boot_out.txt message truncation. #7579. Thanks @jepler.
• Add safemode.py, for programmatic handling of safe mode. #7577. Thanks @dhalbert.
• Fix incorrect exception chaining. #7580, #7566. Thanks @jepler.
• Add animated GIF support: gifio.OnDiskGif. #7648, #7549. Thanks @gamblor21.
• Fix missing internal initialization of display.ColorConverter objects. #7639, #7611. Thanks @gamblor21.
• Support array.extend(iterable). #7552. Thanks @gneverov.
• Add 7-color e-ink display support. #7497. Thanks @tannewt.
• Add dither support to Palette. #7497. Thanks @tannewt.
• Adding caching speed-ups to Palette and ColorConverter. #7497. Thanks @tannewt.

Port and board-specific changes

Broadcom

• Use unmeasured core clock speed check. #7628. Thanks @RetiredWizard.
• Fix neopixel_write. #7570. Thanks @RetiredWizard.

Espressif

• Implement analogbufio. #7602. Thanks @milindmovasha.
• Improve ESP32-S2 I2S playback. #7545. Thanks @jepler.

i.MX

• Fix a number of pwmio problems. #7633. Thanks @tannewt.

RP2040

• Correct error reporting in SSLSocket. #7632, #7623. Thanks @jepler and @DavePutz.
• Increase number of lwip timers for mDNS. #7639, #7589. Thanks @gneverov.
• Add missing common_hal_busio_uart_never_reset(). #7581. Thanks @gneverov.
• Fix "UART in use" message. #7605. Thanks @Neradoc.
• Use lowest drive level for PIO (fixes Adafruit Scorpio USB resets). #7580, #7558. Thanks @jepler.

SAMx

• Fix pad assignments for busio.UART and improve pin validation. #7639, #7616. Thanks @dhalbert.

Spresense

• Update Spresense SDK to version 2.6.0. #7580, #7553. Thanks @kamtom480.

Individual boards

• Hallowing M0: enable native adafruit_bus_device. #7655. Thanks @Neradoc.
• PyKey18, PyKey44, PyKey87: fix number of NeoPixels. #7574 Thanks @jpconstantineau.
• Waveshare ESP32-S2 Pico: fix PSRAM settings. #7626, #7599. Thanks @bill88t.

Documentation changes

• Improve pwmio documentation. #7649. Thanks @jepler.
• Fix duplicate ulab entry in help("modules"). #7639, #7601. Thanks @jepler.

Build and infrastructure changes

• CI refactoring and improvement. #7642, #7631, #7627, #7584, #7567. Thanks @microdev1.
• Hide unnecessary comment lines from Makefile. #7603. Thanks @bill88t.
• Add GitHub web-based UI to create custom board builds in your fork. #7594. Thanks @microdev1.
• Improve GitHub bug reporting template. #7571. Thanks @tekktrik.
• Update build_board_info.py to be compatible with sh module 2.0.0. #7566, #7564. Thanks @Neradoc.

Translation additions and improvements

• Thanks for translations:
  • @Atalanttore (German)
  • @bergdahl (Swedish)
  • @jposada202020 (Spanish)
  • @luisan00 (Spanish)
  • @Neradoc (French)
  • @wtuemura (Portugese - Brazil)

New boards since 8.0.0

• Adafruit HUZZAH32 Breakout. #7619. Thanks @dhalbert.
• Bangle.js. #7497. Thanks @tannewt.
• BrainBoardz Neuron. #7530. Thanks @BrainBoardz.
• COSMO-Pico. #7559. Thanks @startup-potech.
• Espressif ESP32-LyraT. #7625. Thanks @ftab.
• Hack Club Sprig. #7547. Thanks @ajs256.
• LILYGO TEMBED ESP32S3. #7658. Thanks @titimoby.

Known issues

• 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:
  • 8.1.0
  • 8.x.x
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.0.0, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

CircuitPython 8.0.3

This is CircuitPython 8.0.3, the latest bugfix revision of CircuitPython, and is a new stable release.

Notable changes to 8.0.3 since 7.3.0

See the CircuitPython 8.0.0 release notes for full information about changes in 8.0.x since 7.3.0.

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 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:

• 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
• litex: fomu
• 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

RP2040

• Correct error reporting in SSLSocket. #7632. Thanks @jepler.
• Increase number of lwip timers for mDNS. #7589. Thanks @gneverov.

SAMx

• Fix pad assignments for busio.UART and improve pin validation. #7616. Thanks @dhalbert.

Documentation changes

• Fix duplicate ulab entry in help("modules"). #7601. Thanks @jepler.

Build and infrastructure changes

Known issues

• 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:
  • 8.1.0
  • 8.x.x
  • long term

Thanks

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.

CircuitPython 8.0.2

This is CircuitPython 8.0.2, the latest bugfix revision of CircuitPython, and is a new stable release.

[8.0.1 was tagged on the wrong branch and was discarded]

Notable changes to 8.0.2 since 7.3.0

See the CircuitPython 8.0.0 release notes for full information about changes in 8.0.x since 7.3.0.

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 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:

• 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
• litex: fomu
• mimxrt10xx: NXP i.MX RT10xxx
• stm: ST non-STM32F4 chip families

Changes since 8.0.0

Fixes and enhancements

• Deinit the reset pin when displayio.I2CDisplay() fails. #7563. Thanks @Neradoc.
• Fix incorrect exception chaining. #7566. Thanks @jepler.

Port and board-specific changes

RP2040

• Use lowest drive level for PIO (fixes Adafruit Scorpio USB resets). #7558. Thanks @jepler.

Spresense

• Update Spresense SDK to version 2.6.0. #7553. Thanks @kamtom480.

Build and infrastructure changes

• Update build_board_info.py to be compatible with sh module 2.0.0. #7566, #7564. Thanks @Neradoc and @jepler.

Known issues

• 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:
  • 8.1.0
  • 8.x.x
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.0.0, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

CircuitPython 8.0.0

This is CircuitPython 8.0.0, the latest major revision of CircuitPython, and is a new stable release.

Note
Since 8.0.0-beta.6, the file for specifying startup values for WiFi, etc., is now called settings.toml instead of .env, and uses slightly different syntax. Use double quotes instead of single quotes. Further documentation is here.

Warning
The flash partitioning for 2MB and 4MB flash ESP32 and ESP32-C3 boards has changed since 8.0.0-beta.2.
When you load 8.0.0-beta.3 or later over beta.2 (or vice versa), on these boards, CIRCUITPY will be erased and reformatted.

Warning
The flash partitioning for the Raspberry Pi Pico W has changed since 8.0.0-beta.1.
When you load 8.0.0-beta.2 or later over beta.1 (or vice versa), on the Pico W, CIRCUITPY will be erased and reformatted.

Notable changes to 8.0.0 since 7.3.0

Functionality additions

• Add WiFi workflow with browser-based device discovery, filesystem browsing, upload, download, file editing, serial/REPL connection (available on Espressif and Pi Pico W).
• Add a one-line status bar, which displays connection status, last exception, and version on a terminal window title or on the top line of an attached display. Mu 1.2.0 and Thonny 4.0.x and later are able to suppress status bar information in the REPL output.
• A settings.toml file in CIRCUITPY provides environment variable values. Some value names are read by CircuitPython to specify WiFi connection parameters, BLE name, and other startup values. But you can also use settings.toml to specify your own parameters for your programs. Values from settings.toml can be retrieved using os.getenv(). More details here.
• WiFi functionality implemented on the Raspberry Pi Pico W.
• Revised Espressif camera support, now available on ESP32, ESP32-S2, and ESP32-S3.
• Bulk analog input: analogbufio (available only on RP2040 for now).
• Pin state can be preserved during deep sleep (available only on Espressif for now).
• Allow setting USB VID, PID, manufacturer, and product ids at runtime.
• Enable collections.deque on most builds.
• AnalogIn values are full range from 0 to 65535, instead of having zeros on low-order bits.
• In-place firmware update (dualbank) capability may be disabled at runtime in favor of a larger CIRCUITPY drive. This is the default.
• Add TileGrid.contains().
• Add os.utime().
• Add espulp module, for running programs on the ULP co-processor in Espressif chips.
• Add memorymap module for general though limited access to various memory regions.
• A serial "break" on the USB or UART REPL serial connection will cause a KeyboardInterrupt, like ctrl-C. The advantage over ctrl-C is that the break interrupts even if the input buffer is full.
• Add hidden property to vectorio shapes.
• Add native _pixelmap.PixelMap support, for speed.
• Chained exceptions are now implemented.
• Add VfsFat.readonly property.
• Add memorymap to allow access to raw memory locations (currently only on Espressif). #7359. Thanks @tannewt.

Compatibility changes

• PulseOut no longer accepts a PWMOut. Use a Pin instead.
• Auto-brightness support in displayio and framebufferio has been removed. It was never implemented completely.
• OneWire is only in onewireio, and is no longer in busio or bitbangio.
• gamepadshift has been removed: use keypad.ShiftRegisterKeys instead.
• MP3Decoder and WaveFile can now take a filename instead of an open file.
• Print out whole-number floats exactly and correctly.
• Restored rainbowio and onewireio to a number of boards. Some boards still have rainbowio turned off for space reasons.
• i2ctarget.I2CTarget is the new name for i2cperipheral.I2CPeripheral. Accept both for now. I2CPeripheral is deprecated and will be removed in 9.0.0.
• Allow display.root_group to be set, instead of using display.show(). display.show() is deprecated and will be removed in 9.0.0.
• The property supervisor.runtime.autoreload replaces supervisor.disable_autoreload() and supervisor.enable_autoreload().
• The property supervisor.runtime.ble_workflow replaces supervisor.disable_ble_workflow().
• The property supervisor.runtime.next_stack_limit replaces supervisor.set_next_stack_limit().
• The property supervisor.runtime.rgb_status_brightness replaces supervisor.set_rgb_status_brightness().

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 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:

• 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
• litex: fomu
• mimxrt10xx: NXP i.MX RT10xxx
• stm: ST non-STM32F4 chip families

Changes since 8.0.0-rc.2

Fixes and enhancements

• Fix is31fl3741 regression (module currently included only on Adafruit LED Glasses board). #7546. Thanks @FoamyGuy.

Port and board-specific changes

Broadcom

Espressif

• Assign RMT channels correctly on ESP32-C3. #7539. Thanks @DavePutz.

i.MX

nRF

RP2040

SAMx

STM

Individual boards

• Adafruit Metro M7 1011: update flash chip. #7542. Thanks @dhalbert.

Documentation changes

Build and infrastructure changes

Translation additions and improvements

• Thanks for translations:
  • @wtuemura (Portugese - Brazil)

New boards since 8.0.0-rc.2

Known issues

• 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:
  • 8.1.0
  • 8.x.x
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.0.0-rc.2, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

CircuitPython 8.0.0 Release Candidate 2

This is CircuitPython 8.0.0-rc.2, a release candidate for 8.0.0. We believe it is stable, and are making a release candidate for further testing before final release.

NOTE: Since 8.0.0-beta.6, the file for specifying startup values for WiFi, etc., is now called settings.toml instead of .env, and uses slightly different syntax. Use double quotes instead of single quotes. Further documentation is here.

WARNING: The flash partitioning for 2MB and 4MB flash ESP32 and ESP32-C3 boards has changed since 8.0.0-beta.2. When you load 8.0.0-beta.3 or later over beta.2 (or vice versa), on these boards, CIRCUITPY will be erased and reformatted.

WARNING: The flash partitioning for the Raspberry Pi Pico W has changed since 8.0.0-beta.1. When you load 8.0.0-beta.2 or later over beta.1 (or vice versa), on the Pico W, CIRCUITPY will be erased and reformatted.

Notable changes to 8.0.0 since 7.3.0

Functionality additions

• Add WiFi workflow with browser-based device discovery, filesystem browsing, upload, download, file editing, serial/REPL connection (available on Espressif and Pi Pico W).
• Add a one-line status bar, which displays connection status, last exception, and version on a terminal window title or on the top line of an attached display. Mu 1.2.0 and Thonny 4.0.x and later are able to suppress status bar information in the REPL output.
• A settings.toml file in CIRCUITPY provides environment variable values. Some value names are read by CircuitPython to specify WiFi connection parameters, BLE name, and other startup values. But you can also use settings.toml to specify your own parameters for your programs. Values from settings.toml can be retrieved using os.getenv(). More details here.
• WiFi functionality implemented on the Raspberry Pi Pico W.
• Revised Espressif camera support, now available on ESP32, ESP32-S2, and ESP32-S3.
• Bulk analog input: analogbufio (available only on RP2040 for now).
• Pin state can be preserved during deep sleep (available only on Espressif for now).
• Allow setting USB VID, PID, manufacturer, and product ids at runtime.
• Enable collections.deque on most builds.
• AnalogIn values are full range from 0 to 65535, instead of having zeros on low-order bits.
• In-place firmware update (dualbank) capability may be disabled at runtime in favor of a larger CIRCUITPY drive. This is the default.
• Add TileGrid.contains().
• Add os.utime().
• Add espulp module, for running programs on the ULP co-processor in Espressif chips.
• Add memorymap module for general though limited access to various memory regions.
• A serial "break" on the USB or UART REPL serial connection will cause a KeyboardInterrupt, like ctrl-C. The advantage over ctrl-C is that the break interrupts even if the input buffer is full.
• Add hidden property to vectorio shapes.
• Add native _pixelmap.PixelMap support, for speed.
• Chained exceptions are now implemented.
• Add VfsFat.readonly property.
• Add memorymap to allow access to raw memory locations (currently only on Espressif). #7359. Thanks @tannewt.

Compatibility changes

• PulseOut no longer accepts a PWMOut. Use a Pin instead.
• Auto-brightness support in displayio and framebufferio has been removed. It was never implemented completely.
• OneWire is only in onewireio, and is no longer in busio or bitbangio.
• gamepadshift has been removed: use keypad.ShiftRegisterKeys instead.
• MP3Decoder and WaveFile can now take a filename instead of an open file.
• Print out whole-number floats exactly and correctly.
• Restored rainbowio and onewireio to a number of boards. Some boards still have rainbowio turned off for space reasons.
• i2ctarget.I2CTarget is the new name for i2cperipheral.I2CPeripheral. Accept both for now. I2CPeripheral is deprecated and will be removed in 9.0.0.
• Allow display.root_group to be set, instead of using display.show(). display.show() is deprecated and will be removed in 9.0.0.
• The property supervisor.runtime.ble_workflow replaces supervisor.disable_ble_workflow().
• The property supervisor.runtime.next_stack_limit replaces supervisor.set_next_stack_limit().
• The property supervisor.runtime.rgb_status_brightness replaces supervisor.set_rgb_status_brightness().

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 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:

• 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
• litex: fomu
• mimxrt10xx: NXP i.MX RT10xxx
• stm: ST non-STM32F4 chip families

Changes since 8.0.0-rc.1

Fixes and enhancements

• Update ulab to version 6.0.7. #7533. Thanks @jepler.

Port and board-specific changes

Broadcom

Espressif

i.MX

nRF

RP2040

• Do not raise an exception for length of nvm. #7538. Thanks @geneverov.

SAMx

STM

Individual boards

• Adafruit Feather ESP32-S2 Reverse TFT: add pins for buttons. #7526. Thanks @jepler.
• Adafruit Feather ESP32-S3 Reverse TFT: add pins for buttons. #7526. Thanks @jepler.
• BananaPi BPI-Bit-S2: enable status LED. #7510. Thanks @BPI-STEAM.
• Seeed Studio XIAO ESP32C3: correct flash mode. #7509. Thanks @RetiredWizard.

Documentation changes

• Document how to add version information to libraries. #7529. Thanks @jposada202020.
• Fix broken RTD builds. #7508. Thanks @microdev1 and @dhalbert.

Build and infrastructure changes

• Reformat Python code after black update. #7532. Thanks @microdev1.

Translation additions and improvements

• Thanks for translations:
  • @jposada202020 (Spanish)

New boards since 8.0.0-rc.1

• BrainBoardz Neuron. #7530. Thanks @BrainBoardz.

Known issues

• 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:
  • 8.0.0
  • 8.x.x
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.0.0-rc.1, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.