CircuitPython 8.0.0 Beta 6 Released! @circuitpython

From the GitHub release page:

This is CircuitPython 8.0.0-beta.6, a beta release for 8.0.0. It is relatively stable, but there will be further additions, fixes, and changes before final release.

NOTE: 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.
  • MP3Decoder and WaveFile can now take a filename instead of an open file.
  • 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 in favor of a larger CIRCUITPY drive.
  • Add TileGrid.contains().
  • Add os.utime().
  • Add espulp module, for running programs on the ULP RISC-V co-processor 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.

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.
  • 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 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

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).


Documentation is available in

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-beta.5

  • Fix errors in DEBUG=1 Cortex-M4 builds. #7368. Thanks @dhalbert.
  • Fix wifi.Authmode printing. #7349. Thanks @dhalbert.
  • Update network code to use gaierror consistently. #7344. Thanks @jepler.
  • Replace .env with settings.toml. Remove dotenv module. #7321. Thanks @jepler.
  • displayio: set in_group to false when removing a layer from a group. #7327. Thanks @pypewpew (@deshipu).
  • Add VfsFat.readonly property. #7317. Thanks @s-ol.

Fixes and enhancements

Port and board-specific changes



  • Support for ULP co-processor by espulp and memorymap modules. Replaces coproc. #7359. Thanks @tannewt and thanks to @MicroDev1 for the original coproc module.
  • Make master_clock_pin optional for esp32_camera, to support boards with built-in clocks. #7355. Thanks @pypewpew (@deshipu).


  • Fix i.MX builds by redoing pin reset logic. #7345. Thanks @dhalbert.





Individual boards

  • BananaPi BPI-PicoW-S3: add status LED. #7315. Thanks @RetiredWizard.
  • CRCibernetica IdeaBoard: add frozen modules, change flash size. #7356. Thanks @CRCibernetica.
  • Invector Labs Challenger 840: update definition. #7331. Thanks @PontusO.
  • Raspberry Pi Pico: use on-board LED for status. #7362. Thanks @Neradoc.
  • Seeed XIAO nRF52840: add charge rate pin. #7320. Thanks @dhalbert and @PheebeUK.

Documentation changes

  • Remove MicroPython asyncio documentation; improve libraries page and links. #7324. Thanks @dhalbert.

Build and infrastructure changes

  • Fix unix build. #7364. Thanks @jepler.
  • Fix devcontainer (GitHub codespaces) support. #7350. Thanks @bablokb.
  • Revert update to protomatter library due to regression. #7353. Thanks @jepler.
  • Fix stub generation. #7341. Thanks @jepler.
  • Temporary fix for tj-actions/changed-files problem. #7329. Thanks @MicroDev1.

Translation additions and improvements

  • Thanks for translations:
    • @bergdahl (Swedish)
    • @wtuemura (Portugese – Brazil)

New boards since 8.0.0-beta.5

  • Invector Labs Challenger RP2040 SD/RTC. #7336. Thanks @PontusO.

Known issues

  • See for other issues, including issues still to be addressed for:


Thank you to all who used, tested, and contributed since 8.0.0-beta.4, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

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