CircuitPython 8.2.6

This is CircuitPython 8.2.6, the latest bugfix revision of CircuitPython, and is a new stable release.

WARNING for nRF52 boards only: If your board has an nRF52 UF2 bootloader whose version is before 0.6.1, you will not be able to load CircuitPython 8.2.0 and later. The 8.2.0 firmware is larger than what the bootloader can handle. See these instructions for updating your bootloader.

Notable changes to 8.2.6 since 8.2.5

• Updated TLS root certificates to support servers using Let's Encrypt.

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 8.2.5

Fixes and enhancements

• Add TLS root certificate to handle servers using Let's Encrypt. #8386. Thanks @dhalbert.
• Make SSLContext.load_verify_locations() not require keyword argument. #8392. Thanks @dhalbert.

Port and board-specific changes

Broadcom

Espressif

i.MX

nRF

• Revert #8089: nRF UART sleep power saving. #8391. Thanks @dhalbert.

RP2040

SAMx

SiLabs

Spresense

STM

Individual boards

Documentation changes

Build and infrastructure changes

Translation additions and improvements

New boards since 8.2.5

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:
  • 8.2.x
  • 9.0.0
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.2.5, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

CircuitPython 8.2.5

This is CircuitPython 8.2.5, the latest bugfix revision of CircuitPython, and is a new stable release.

WARNING for nRF52 boards only: If your board has an nRF52 UF2 bootloader whose version is before 0.6.1, you will not be able to load CircuitPython 8.2.0 and later. The 8.2.0 firmware is larger than what the bootloader can handle. See these instructions for updating your bootloader.

Notable changes to 8.2.5 since 8.2.4

• Updated TLS root certificates.
• Tuning of RGBMatrix.
• New and updated boards.

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 8.2.4

Fixes and enhancements

• Further tuning of protomatter library, used by RGBMatrix. #8376. Thanks @PaintYourDragon and @dhalbert.
• Update TLS root certificates. #8374. Thanks @dhalbert.

Port and board-specific changes

Broadcom

Espressif

• Forbidden pins are now always in use. #8345. Thanks @tannewt.

i.MX

nRF

RP2040

SAMx

SiLabs

Spresense

STM

Individual boards

• Adafruit FunHouse: remove frozen libraries. #8356, #8348. Thanks @jepler and @makermelissa.
• BrainBoardz Neuron: update pins. #8343. Thanks @BrainBoardz.
• Unexpecter Maker FeatherS3: add second STEMMA port and improve pin names. #8375. Thanks @UnexpectedMaker.

Documentation changes

• Fix ReadTheDocs theme specification. #8322. Thanks @jepler.

Build and infrastructure changes

• Don't rebuild all boards if conf.py changes. #8325. Thanks @jepler.

Translation additions and improvements

New boards since 8.2.4

• Arduino Nano ESP32-S3. #8373. Thanks @makermelissa.
• Waveshare ESP32-S3-Pico. #8372. Thanks @tirtharajsinha.

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:
  • 8.2.x
  • 9.0.0
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.2.4, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

CircuitPython 8.2.4

This is CircuitPython 8.2.4, the latest bugfix revision of CircuitPython, and is a new stable release.

WARNING for nRF52 boards only: If your board has an nRF52 UF2 bootloader whose version is before 0.6.1, you will not be able to load CircuitPython 8.2.0 and later. The 8.2.0 firmware is larger than what the bootloader can handle. See these instructions for updating your bootloader.

Notable changes to 8.2.4 since 8.2.3

• New and fixed boards.
• Improved messages and documentation.

Notable changes to 8.2.4 since 8.1.0

• Continued enhancement of synthio.
• RP2040 alarm.sleep_memory.

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 8.2.3

Fixes and enhancements

• Add protocol and multicast constant definitions to SocketPool. #8306. Thanks @jepler.
• Fix displayio crash when CIRCUITPY_REPL_LOGO is disabled. #8301. Thanks @deshipu.
• Improve hard-fault safemode message. #8297. Thanks @dhalbert.

Port and board-specific changes

Broadcom

Espressif

i.MX

nRF

RP2040

SAMx

SiLabs

Spresense

STM

Individual boards

• Pimoroni Pico DVI Base: fix display initialization. #8309. Thanks @dhalbert.

Documentation changes

• Document RGBMatrix constructor arguments. #8319. Thanks @jepler.

Build and infrastructure changes

• Fix Sphinx build issue. #8312. Thanks @jepler.

Translation additions and improvements

New boards since 8.2.3

• Adafruit Metro ESP32-S3. #8287, #8280, #8215. Thanks @makermelissa, @dglaude, @kattni.
• Pajenicko PicoPad. #8279, #8241, #8214. Thanks @lynt-smitka, @dglaude.

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:
  • 8.2.x
  • 9.0.0
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.2.3, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

CircuitPython 8.2.3

This is CircuitPython 8.2.3, the latest bugfix revision of CircuitPython, and is a new stable release.

WARNING for nRF52 boards only: If your board has an nRF52 UF2 bootloader whose version is before 0.6.1, you will not be able to load CircuitPython 8.2.0 and later. The 8.2.0 firmware is larger than what the bootloader can handle. See these instructions for updating your bootloader.

Notable changes to 8.2.3 since 8.2.2

• Improve RGBMatrix timing on SAMx5x.

Notable changes to 8.2.3 since 8.1.0

• Continued enhancement of synthio.
• RP2040 alarm.sleep_memory.

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 8.2.2

Fixes and enhancements

Port and board-specific changes

Broadcom

Espressif

i.MX

nRF

RP2040

SAMx

• Improve RGBMatrix timing. #8220. Thanks @PaintYourDragon and @jepler.

SiLabs

Spresense

STM

Individual boards

Documentation changes

• Fix ReadTheDocs builds by explicitly redirecting index.html to the README. #8249. Thanks @jepler.

Build and infrastructure changes

Translation additions and improvements

New boards since 8.2.2

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:
  • 8.2.x
  • 9.0.0
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.2.2, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

CircuitPython 8.2.2

This is CircuitPython 8.2.2, the latest bugfix revision of CircuitPython, and is a new stable release.

WARNING for nRF52 boards only: If your board has an nRF52 UF2 bootloader whose version is before 0.6.1, you will not be able to load CircuitPython 8.2.0 and later. The 8.2.0 firmware is larger than what the bootloader can handle. See these instructions for updating your bootloader.

Notable changes to 8.2.2 since 8.2.1

• Replace expired Adafruit IO SSL certificate.

Notable changes to 8.2.2 since 8.1.0

• Continued enhancement of synthio.
• RP2040 alarm.sleep_memory.

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 8.2.1

Fixes and enhancements

• Replace expired Adafruit IO SSL certificate. #8227. Thanks @jepler for PR and @brentru for certificate update.

Port and board-specific changes

Broadcom

Espressif

i.MX

nRF

RP2040

SAMx

SiLabs

Spresense

STM

Individual boards

Documentation changes

Build and infrastructure changes

Translation additions and improvements

New boards since 8.2.1

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:
  • 8.2.x
  • 9.0.0
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.2.1, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

CircuitPython 8.2.1

This is CircuitPython 8.2.1, the latest bugfix revision of CircuitPython, and is a new stable release.

WARNING for nRF52 boards only: If your board has an nRF52 UF2 bootloader whose version is before 0.6.1, you will not be able to load CircuitPython 8.2.0 and later. The 8.2.0 firmware is larger than what the bootloader can handle. See these instructions for updating your bootloader.

Notable changes to 8.2.1 since 8.1.0

• Continued enhancement of synthio.
• RP2040 alarm.sleep_memory.

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 8.2.1

Most changes below are backports from main. Thanks @dhalbert for the backport pull requests.

Fixes and enhancements

• Return correct type from dict.fromkeys(). #8207, #8175. Thanks @kbsriram and @dhalbert.
• Raise NotImplementedError for os.getenv() on small boards without settings.toml support. #8206, #8169. Thanks @jepler and @dhalbert.
• Fix setting wifi.radio.hostname. #8201, #8150. Thanks @microdev1 and @dhalbert.

Port and board-specific changes

Broadcom

Espressif

• Increase maximum synthio channels to 12. #8212, #8189. Thanks @todbot.

i.MX

nRF

RP2040

• Fix RP2040 manual safe mode via reset button. #8170. Thanks @tannewt.

SAMx

SiLabs

Spresense

STM

Individual boards

• 42. Keebs Frood: Rev7 uses new flash chip. #8203, #8154. Thanks @piit79.
• Adafruit MatrixPortal S3: fix address pins. #8199, #8137. Thanks @makermelissa.
• Adafruit Metro RP2040: support 16MB flash. #8181. Thanks @jepler.
• Adafruit QT Py ESP32-S3 no PSRAM: remove frozen libraries. #8197, #8130. Thanks @dhalbert.
• Espressif ESP32-S3 Box: use PSRAM. #8197, #8129. Thanks @Neradoc.
• Espressif ESP32-S3 Box Lite: use PSRAM. #8197, #8129. Thanks @Neradoc.
• UnexpectedMaker FeatherS3: add second I2C bus. #8174. Thanks @UnexpectedMaker.

Documentation changes

• Note that wifi.radio.ipv4_address_ap is read-only. #8208, #8180. Thanks @anecdata and @dhalbert.
• Document various networking restrictions. #8205, #8165. Thanks @anecdata and @dhalbert.
• Automate documentation of optional types and functions. #8185. Thanks @jepler.
• Fix zlib.decompress() name. #8195, #8125. Thanks @jimmo.

Build and infrastructure changes

Translation additions and improvements

New boards since 8.2.0

• Adafruit Metro M7 1011 SD. #8196, #8127. Thanks @dhalbert.
• Adafruit Metro RP2040. #8181. #8194, #8035. Thanks @dhalbert and @jepler.
• Adafruit QT Py ESP32-S3 4MB Flash 2MB PSRAM. #8198, #8130. Thanks @dhalbert.
• Datanoise PicoADK. #8204, #8166, #8156. Thanks @DatanoiseTV and @dhalbert.
• Makerdiary nRF52840 Connect Kit. #8200, #8142. Thanks @makerdiary.
• splitkb.com Liatris. #8202, #8152. Thanks @splitkb.

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:
  • 8.2.x
  • 9.0.0
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.2.0, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

CircuitPython 8.2.0

This is CircuitPython 8.2.0, the latest minor revision of CircuitPython, and is a new stable release.

WARNING for nRF52 boards only: If your board has an nRF52 UF2 bootloader whose version is before 0.6.1, you will not be able to load CircuitPython 8.2.0 and later. The 8.2.0 firmware is larger than what the older bootloaders can handle. See these instructions for updating your bootloader.

Notable changes to 8.2.0 since 8.1.0

• Continued enhancement of synthio.
• RP2040 alarm.sleep_memory.

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 8.2.0-rc.1

This release is a relabeling of 8.2.0-rc.1 and is otherwise the same as that release.

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:
  • 9.0.0
  • long term

Thanks

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

CircuitPython 8.2.0 Release Candidate 1

This is CircuitPython 8.2.0-rc.1, a release candidate for CircuitPython 8.2.0. We believe it is stable, and are making a release candidate for further testing before final release.

Notable changes to 8.2.0 since 8.1.0

• Continued enhancement of synthio.
• RP2040 alarm.sleep_memory.

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 8.2.0-rc.0

Fixes and enhancements

• Fix shape.set_boundary(). #8114. Thanks @FoamyGuy.

Port and board-specific changes

Broadcom

Espressif

i.MX

nRF

RP2040

• Prevent bad audio artifacts during flash writes. #8123. Thanks @jepler.

SAMx

SiLabs

Spresense

STM

Individual boards

• Espressif ESP32-C3-DevKitM-1: Correct board.BUTTON. #8116. Thanks @Neradoc.

Documentation changes

Build and infrastructure changes

Translation additions and improvements

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

New boards since 8.2.0-rc.0

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:
  • 8.2.0
  • 8.x.x
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.2.0-rc.0, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

CircuitPython 8.2.0 Release Candidate 0

This is CircuitPython 8.2.0-rc.0, a release candidate for CircuitPython 8.2.0. We believe it is stable, and are making a release candidate for further testing before final release.

Notable changes to 8.2.0 since 8.1.0

• Continued enhancement of synthio.
• RP2040 alarm.sleep_memory.

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 8.2.0-beta.1

Fixes and enhancements

• Improve OnDiskGif documentation; report clearer error when image is too wide. #8102. Thanks @dhalbert.
• Validate wifi access point channel. #8087. Thanks @anecdata.
• Update RGBMatrix protomatter library. #8056. Thanks @jepler.
• Speed up displayio refresh when objects are hidden. #8050. Thanks @FoamyGuy.

Port and board-specific changes

Broadcom

Espressif

i.MX

• Fix pin checking for busio.SPI. #8084. Thanks @breakersun.

nRF

• Reset UART peripheral on deinit to save power. #8089. Thanks @furbrain.
• Allow 12 voices for synthio. #8077. Thanks @jepler.

RP2040

SAMx

SiLabs

• Improve README.

Spresense

• Update SDK to 3.0.1. Thanks @kamtom480.

STM

Individual boards

• Pimoroni Badger 2040: increase display contrast. #8075. Thanks @mariobodemann.

Documentation changes

• Document RP2040 countio limitations. #8104. Thanks @dhalbert.
• Fix typo in aesio documentation. #8097. Thanks @dhalbert.
• Correct wifi.radio.start_ap documentation. #7680. Thanks @dhalbert.

Build and infrastructure changes

• Speed up LTO builds by using parallel make jobs. #8096. Thanks @jepler.

Translation additions and improvements

• Thanks for translations:
  • @rezaalmanda (Indonesian)

New boards since 8.2.0-beta.1

• Adafruit MatrixPortal S3. #8056. Thanks @jepler.
• Smart Bee Designs Bee-Data-Logger. #8099. Thanks @strid3r21.
• Unexpected Maker NANOS3. #8080. Thanks @UnexpectedCircuitPython (@UnexpectedMaker).

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:
  • 8.2.0
  • 8.x.x
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.2.0-beta.1, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.

CircuitPython 8.2.0 Beta 1

This is CircuitPython 8.2.0-beta.1, a beta release for CircuitPython 8.2.0, and is a new unstable release.

Notable changes to 8.2.0 since 8.1.0

• Continued enhancement of synthio.
• RP2040 alarm.sleep_memory.

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 8.2.0-beta.0

Fixes and enhancements

• Reduce size of stack frames. #8071. Thanks @tannewt.
• Use biquad filtering per note for synthio. #8048. Thanks @jepler.
• API changes and documentation improvents for synthio. #8024. Thanks @jepler.

Port and board-specific changes

Broadcom

Espressif

i.MX

RP2040

SAMx

SiLabs

• Update README. #8042. Thanks @applecuckoo.

Spresense

STM

Individual boards

• Lolin C3 Pico: fix pin assignments. #8031. Thanks @tkroo.
• Makerdiary M60: allow powering via battery. #8043. Thanks @hyx0329.
• Microchip SAME54 Xplained Pro: support additional flash chip type. #8054. Thanks @tomiahola.
• Nordic PCA10056: make buttons and LEDs compatible with PCA10100. #8037. Thanks @jpconstantineau.
• Pimoroni Badger 2040: update display start sequence to increase constrast. #8075. Thanks @mariobodemann.

Documentation changes

Build and infrastructure changes

• Provide port-specific fetching of submodules. #8073, #8070. Thanks @dhalbert.
• Fix compilation cast issue. #8039. Thanks @graeme-winter.
• More synthio tests. #8028. Thanks @jepler.

Translation additions and improvements

• Thanks for translations:
  • @Atalanttore (German)
  • @bergdahl (Swedish)

New boards since 8.2.0-beta.0

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:
  • 8.2.0
  • 8.x.x
  • long term

Thanks

Thank you to all who used, tested, and contributed since 8.2.0-beta.0, including the contributors above, and many others on GitHub and Discord. Join us on the Discord chat to collaborate.