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CircuitPython 3.0.0 Beta 0!

23 May 20:58
@tannewt tannewt
3.0.0-beta.0
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CircuitPython 3.0.0 Beta 0! Pre-release
Pre-release

3.0.0 is the latest major revision of CircuitPython and features new support for the SAMD51 (aka M4) and preliminary support for the nRF52 BLE chipset. It also features better memory utilization so more can be loaded in the same amount of space.

Beta!

This is an beta release of 3.0.0. It has the full functionality of 2.x on M0 boards but has API changes and potentially bugs. Please use the latest stable release when first starting with CircuitPython. It is stable.

When you find a bug please check the current known issues and file an issue if something isn't already known.

Changes since Alpha 6

  • A number of ESP8266 fixes. Thanks @sommersoft, @jerryneedell and @larsks!
  • CircuitPython and Blinka logos are now in logo. Thanks @tannewt and @deshipu
  • Improve RTC precision on SAMD21. Thanks @notro
  • Re-enable audiobusio.PDMIn with frequency renamed to sample_rate. Thanks @tannewt
  • microcontroller.cpu.temperature implemented on SAMD21 and SAMD51. Thanks @dhalbert
  • ubinascii is renamed binascii to match CPython. Thanks @jepler
  • samd.clock add to enable low level clock tuning. Thanks @notro
  • CPU cache enabled on SAMD51 leading to 1-2x speed improvement. Thanks @dhalbert and @WestfW
  • AudioOut and I2SOut now support pause and resume while playing back a sample. Thanks @tannewt
  • Support kwargs in bitbangio. Thanks @deanm1278
  • nRF52 build now includes framebuf, binascii and hashlib thanks to @jepler
  • Makefile improvements around selecting Python build. Thanks @rhooper
  • Doc improvements thanks to @wickedchicken and @kattni
  • Top-level Makefile builds sphinx docs thanks to @khawley
  • OSErrors are now more human friendly thanks to @godlygeek
  • ucollections has been replaced with collections to match CPython. Thanks @bildzeitung.
  • supervisor.reload() now available to reload the VM. It no longer uses KeyboardInterruptException but rather its own ReloadException. Thanks to @rhooper
  • Trinket M0 and Gemma M0 builds no longer include pin objects for all microcontroller pins. They only include those used by the board. Thanks to @rhooper
  • Add board.I2C(), board.SPI() and board.UART() as singleton objects for default buses as defined on the board. Thanks to @matt-land
  • bitbangio.I2C now has timeout kwarg to set max clock stretch wait time. Thanks to @jerryneedell
  • Longints are now supported on M0 Express boards (along with M4 boards). Thanks to @notro and @dhalbert
  • Add custom board for CircuitPlayground Crickit. Thanks to @dhalbert and @ladyada.

Installation

To install follow the instructions in our new 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).

All builds except ESP8266 are available as both UF2 and bin files here along with test builds.

New Features in 3.0.0

Breaking Changes!

  • ustruct has been replaced with struct to match CPython.
  • ucollections has been replaced with collections to match CPython. Thanks @bildzeitung.
  • ubinascii is renamed binascii to match CPython. Thanks @jepler
  • The mpy format has changed so make sure and use a 3.0.0 bundle for libraries.
  • Non-standard array types inherited from MicroPython are no longer supported in favor of matching CPython. Thanks to @jepler.
  • audioio.AudioOut now takes the sample to playback in play rather than in the constructor. (This enables playback through other outputs such as audiobusio.I2SOut.) It also means you only need one AudioOut for multiple samples.
  • PDMIn's frequency property has been renamed to sample_rate.
  • Trinket M0 and Gemma M0 builds no longer include pin objects for all microcontroller pins. They only include those used by the board. Thanks to @rhooper
  • Auto-reload no longer uses KeyboardInterruptException but rather its own ReloadException. Thanks to @rhooper

Thanks

Thank you to all who used, tested, contributed, helped out, and participated on GitHub, sprinted with us at PyCon and/or chatted with us on Discord:
@ladyada, @dhalbert, @tannewt, @kattni, @microbuilder, @arturo182, @jamesadevine, @tralamazza, @hathach, @glennrub, @siddacious, @deshipu, @tdicola, @mrmcwethy, @willingc, @sommersoft, @deanm1278, @jerryneedell, @stewmystre, @boneskull, @Sigafoos, @brentru, @caternuson, @process1183, @Andon-A, @asherlie, adamwolf, dastels, @hukuzatuna, @KurticusMaximus, nis, BravoDelta, aj_nys, @wolf, @vesperk38, @jepler, @notro, CGrover, @larsks, @WestfW, @rhooper, @khawley, @godlygeek, @bildzeitung, @matt-land, @wickedchicken, @margaret, sdw_nj, @ntoll, MikeBarela, Josh, Les, @cefn, (from PyCon sprints) Dylan W, Anders, David, Dylan H, Adam, John, Chris, Lady Red, Craig, Aaron, John, Boris, Drew and Kathryn and surely more we have missed. Join us on the Discord chat to collaborate.

Documentation

Documentation is available on readthedocs.io.

Here are all the changes since 2.3.1.

This release is based on MicroPython 1.9.3. Suppor...

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CircuitPython 2.3.1

07 May 18:30
@dhalbert dhalbert
2.3.1
6e95c90
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CircuitPython 2.3.1

CircuitPython 2.3.1 fixes a regression introduced in 2.3.0: if boot.py changed the root filesystem permission to read/write using storage.remount(), that permission change would get undone. This bug would prevent some data logging code from working, for instance.

All other changes introduced in 2.3.0 are still present: battery power fix, storage.erase_filesystem(), and new frozen libraries for Circuit Playground express. Refer to the 2.3.0 release for details.

Thanks

Thanks to @jerryneedell for finding this issue and doing further testing! Join us on the Discord chat to collaborate.

Documentation

Documentation is available in readthedocs.io.

Here are the changes since 2.3.0 and changes since 2.2.4.

This release is based on MicroPython 1.9.2. Support upstream MicroPython by purchasing a PyBoard (from Adafruit here).

Troubleshooting

Check out this guide for info on common problems with CircuitPython. If you are still having, then post to the Adafruit Support Forums and join Discord.

mpy-cross

The 2.2.0 mpy-cross executables in this release work fine with all 2.x releases.

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CircuitPython 2.3.0

04 May 18:15
@dhalbert dhalbert
2.3.0
3814e97
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CircuitPython 2.3.0

Summary

This release fixes a longstanding issue of CIRCUITPY sometimes being erased when applying power or when batteries run down. It also adds the CircuitPlayground and HID libraries as frozen libraries on the Circuit Playground Express build. And finally, if CIRCUITPY becomes partially corrupted, you can now use storage.clear_filesystem() to erase and reformat it, and reset the board.

Details

Power-on CIRCUITPY corruption fix

CircuitPython writes version information to boot_out.txt when it starts from a hard reset or power on. It also writes whatever boot.py (or settings.py, etc.) prints to boot_out.txt. If power failed while boot_out.txt was being written, CIRCUITPY could become severely corrupted. When power returned, CircuitPython would erase and reformat CIRCUITPY to fix the corruption. Several things were done to ameliorate this problem:

  1. Do not rewrite boot_out.txt if the version information in it will not change and there is no boot.py.
  2. If the version information has changed, or there is a boot.py file, wait 1.5 seconds to ensure power is stable before starting to write boot_out.txt and run boot.py.
  3. Raise the "brownout" voltage below which CircuitPython refuses to run from 1.7V to 2.8V. This ensures all chips on the board have proper voltage to run.

Additional frozen libraries added to CircuitPython image for Circuit Playground Express

The CircuitPlayground (aka Express or cpx) library and the HID librariy have been added as frozen libraries to the Circuit Playground Express firmware image. The CircuitPlayground library provides easy access to the built-in sensors and peripherals on the Circuit Playground Express (CPX) board. Using the frozen versions of these libraries can save RAM and allow you to run larger programs. Remove the versions in the lib/ directory if you want to use the frozen versions. (Or change sys.path to put .frozen first.)

storage.erase_filesystem()

Sometimes CIRCUITPY becomes partially corrupted, but not badly enough so that it is automatically reformatted. You can now use erase.filesystem() to reformat easily and quickly, without having to use a special erase .uf2 file and then reload CircuitPython. In the REPL, just do:

import storage
storage.erase_filesystem()

This will erase and reformat CIRCUITPY, and reset the board.

Other changes

The _stage module now uses 16-bit coordinates to support larger screens. Thanks @deshipu!

The esp8266 build now uses the latest version of the SDK toolchain. Thanks @jepler!

Thanks

Thanks to @dhalbert, @tannewt, @kattni, @jepler, @deshipu, @ladyada, and @croadfeldt (who helped greatly with testing the power fixes) for help with this release! Join us on the Discord chat to collaborate.

Documentation

Documentation is available in readthedocs.io.

Here are all the changes since 2.2.4.

This release is based on MicroPython 1.9.2. Support upstream MicroPython by purchasing a PyBoard (from Adafruit here).

Troubleshooting

Check out this guide for info on common problems with CircuitPython. If you are still having, then post to the Adafruit Support Forums and join Discord.

mpy-cross

The 2.2.0 mpy-cross executables in this release work fine with 2.3.0.

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CircuitPython 3.0.0 Alpha 6!

25 Apr 00:00
@tannewt tannewt
3.0.0-alpha.6
8cadcc8
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CircuitPython 3.0.0 Alpha 6! Pre-release
Pre-release

3.0.0 is the latest major revision of CircuitPython and features new support for the SAMD51 (aka M4) and preliminary support for the nRF52 BLE chipset. It also features better memory utilization so more can be loaded in the same amount of space.

Alpha!

This is an alpha release of 3.0.0. Alpha releases do not have the complete API from 2.x and are only meant for testing. (Beta release will have the full API but still need work.) Please use the latest stable release when first starting with CircuitPython. It is stable.

When you find a bug please check the current known issues and file an issue if something isn't already known.

Changes since Alpha 4

Installation

To install follow the instructions in our new 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).

All builds except ESP8266 are available as both UF2 and bin files here along with test builds.

New Features in 3.0.0

Breaking Changes!

  • ustruct has been replaced with struct to match CPython.
  • The mpy format has changed so make sure and use a 3.0.0 bundle for libraries.
  • Non-standard array types inherited from MicroPython are no longer supported in favor of matching CPython. Thanks to @jepler.
  • audioio.AudioOut now takes the sample to playback in play rather than in the constructor. (This enables playback through other outputs such as audiobusio.I2SOut.) It also means you only need one AudioOut for multiple samples.

Thanks

Thank you to all who used, tested, contributed, helped out, and participated on GitHub and/or Discord:
@ladyada, @dhalbert, @tannewt, @kattni, @microbuilder, @arturo182, @jamesadevine, @tralamazza, @hathach, @glennrub, @siddacious, @deshipu, @tdicola, @mrmcwethy, @willingc, @sommersoft, @deanm1278, @jerryneedell, @stewmystre, @boneskull, @Sigafoos, @brentru, @caternuson, @process1183, @Andon-A, @asherlie, adamwolf, dastels, @hukuzatuna, @KurticusMaximus, nis, BravoDelta, aj_nys, @wolf, @vesperk38, @jepler, @notro, CGrover and surely more we have missed. Join us on the Discord chat to collaborate.

Documentation

Documentation is available on readthedocs.io.

Here are all the changes since 2.2.3.

This release is based on MicroPython 1.9.3. Support upstream MicroPython by purchasing a PyBoard (from Adafruit here).

Troubleshooting

Check out this guide for info on common problems with CircuitPython. If you are still having, then post to the Adafruit Support Forums and join Discord.

Note: 3.0.0-alpha.5 was incorrectly tagged on an older commit so we're already now alpha 6! Yay free numbers!

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CircuitPython 3.0.0 Alpha 4!

11 Apr 02:56
@tannewt tannewt
3.0.0-alpha.4
f02cbea
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CircuitPython 3.0.0 Alpha 4! Pre-release
Pre-release

3.0.0 is the latest major revision of CircuitPython and features new support for the SAMD51 (aka M4) and preliminary support for the nRF52 BLE chipset. It also features better memory utilization so more can be loaded in the same amount of space.

Alpha!

This is an alpha release of 3.0.0. Alpha releases do not have the complete API from 2.x and are only meant for testing. (Beta release will have the full API but still need work.) Please use the latest stable release when first starting with CircuitPython. It is stable.

When you find a bug please check the current known issues and file an issue if something isn't already known.

Changes since Alpha 3

  • A host of potential crashes were fixed by @jepler.
  • Files to prevent mac from indexing the drive are created automatically. Thanks @jepler!
  • * and *= implemented for array.array. Thanks @jepler!
  • Implemented seeking to non-zero locations. Thanks @aykevl and @jepler.
  • Detect when USB has been plugged in with supervisor.runtime.serial_connected. Thanks @sommersoft and @dhalbert.
  • Non-standard array types inherited from MicroPython are no longer supported in favor of matching CPython. Thanks to @jepler.
  • Change file system label (CIRCUITPY by default) using storage.getmount("/").label.
  • Add storage.erase_filesystem() to make erasing the file system easy. Thanks @dhalbert!
  • atmel-samd: Fix status DotStar on Gemma M0. Thanks @jerryneedell!
  • atmel-samd: Add digital pin names for CircuitPlayground Express. Thanks @kattni!
  • atmel-samd: Can now paste more than 128 characters into REPL thanks to @sommersoft .
  • atmel-samd: I2C now checks for the presence of pull up resistors and throws an exception if they weren't detected. Thanks to @kattni, @dhalbert and @tannewt.
  • atmel-samd: Fix unique id read on SAMD. Thanks @jepler.
  • atmel-samd: Fixed gamepad crash when given objects of the wrong type. Thanks @deshipu!
  • atmel-samd: Fixed resetting to bootloader. Thanks @jepler!
  • atmel-samd: Add usb_hid support to 3.0 including Consumer Controls (aka multimedia keys). Thanks @dhalbert.

Installation

To install follow the instructions in our new 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).

All builds except ESP8266 are available as both UF2 and bin files here along with test builds.

New Features in 3.0.0

Breaking Changes!

  • ustruct has been replaced with struct to match CPython.
  • The mpy format has changed so make sure and use a 3.0.0 bundle for libraries.
  • Non-standard array types inherited from MicroPython are no longer supported in favor of matching CPython. Thanks to @jepler.

Thanks

Thank you to all who used, tested, contributed, helped out, and participated on GitHub and/or Discord:
@ladyada, @dhalbert, @tannewt, @microbuilder, @arturo182, @jamesadevine, @tralamazza, @hathach, @glennrub, @siddacious, @deshipu, @tdicola, @mrmcwethy, @willingc, @sommersoft, @deanm1278, @jerryneedell, @stewmystre, @boneskull, @Sigafoos, @brentru, @caternuson, @process1183, @Andon-A, @asherlie, adamwolf, dastels, @hukuzatuna, @KurticusMaximus, nis, BravoDelta, aj_nys, @wolf, @vesperk38, @jepler, @notro, CGrover and surely more we have missed. Join us on the Discord chat to collaborate.

Documentation

Documentation is available on readthedocs.io.

Here are all the changes since 2.2.3.

This release is based on MicroPython 1.9.3. Support upstream MicroPython by purchasing a PyBoard (from Adafruit here).

Troubleshooting

Check out this guide for info on common problems with CircuitPython. If you are still having, then post to the Adafruit Support Forums and join Discord.

Assets 17
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CircuitPython 3.0.0 Alpha 3!

14 Mar 22:30
@tannewt tannewt
3.0.0-alpha.3
f173d45
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CircuitPython 3.0.0 Alpha 3! Pre-release
Pre-release

3.0.0 is the latest major revision of CircuitPython and features new support for the SAMD51 (aka M4) and preliminary support for the nRF52 BLE chipset. It also features better memory utilization so more can be loaded in the same amount of space.

Alpha!

This is an alpha release of 3.0.0. Alpha releases do not have the complete API from 2.x and are only meant for testing. (Beta release will have the full API but still need work.) Please use the latest stable release when first starting with CircuitPython. It is stable.

When you find a bug please check the current known issues and file an issue if something isn't already known.

Changes since Alpha 2

Installation

To install follow the instructions in our new 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).

All builds except ESP8266 are available as both UF2 and bin files here along with test builds.

New Features in 3.0.0

Breaking Changes!

  • ustruct has been replaced with struct to match CPython.
  • The mpy format has changed so make sure and use a 3.0.0 bundle for libraries.

Thanks

Thank you to all who used, tested, contributed, helped out, and participated on GitHub and/or Discord:
@ladyada, @dhalbert, @tannewt, @microbuilder, @arturo182, @jamesadevine, @tralamazza, @hathach, @glennrub, @siddacious, @deshipu, @tdicola, @mrmcwethy, @willingc, @sommersoft, @deanm1278, @jerryneedell, @stewmystre, @boneskull, @Sigafoos, @brentru, @caternuson, @process1183, @Andon-A, @asherlie, adamwolf, dastels, @hukuzatuna, @KurticusMaximus, nis, BravoDelta, aj_nys, @wolf, @vesperk38 and surely more we have missed. Join us on the Discord chat to collaborate.

Documentation

Documentation is available in readthedocs.io.

Here are all the changes since 2.2.3.

This release is based on MicroPython 1.9.3. Support upstream MicroPython by purchasing a PyBoard (from Adafruit here).

Troubleshooting

Check out this guide for info on common problems with CircuitPython. If you are still having, then post to the Adafruit Support Forums and join Discord.

Assets 16
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CircuitPython 2.2.4

07 Mar 18:47
@tannewt tannewt
2.2.4
5f326ac
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CircuitPython 2.2.4

Another small release for new boards! This release adjusts the status LED brightness. The newer Itsy Bitsy M0 Express, Gemma M0 and Trinket M0 have a new rev of DotStar that changes the brightness curve to be much dimmer at the minimum. The fix finds a middle ground that's not too bright on old ones and not too dim on new ones.

Installation

To install follow the instructions in our new 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).

All builds except ESP8266 are available as both UF2 and bin files here along with test builds.

Use the mpy-cross executables below to pre-compile .py files to .mpy files. You might need to do this if your .py file is too large to compile on the board. Details here. The 2.2.0 mpy-cross versions are still compatible with this new release.

Changes since 2.2.3

Thanks

Thank you to all who used, tested, contributed helped out, and participated on GitHub and/or discord:
@dhalbert, @tannewt, @kattni, @tuupola, @jerryneedell and @ladyada and surely more we have missed. Join us on the Discord chat to collaborate.

Documentation

Documentation is available in readthedocs.io.

Here are all the changes since 2.2.3.

This release is based on MicroPython 1.9.2. Support upstream MicroPython by purchasing a PyBoard (from Adafruit here).

Troubleshooting

Check out this guide for info on common problems with CircuitPython. If you are still having, then post to the Adafruit Support Forums and join Discord.

Assets 18
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CircuitPython 3.0.0 Alpha 2!

28 Feb 20:15
@tannewt tannewt
3.0.0-alpha.2
568c04e
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CircuitPython 3.0.0 Alpha 2! Pre-release
Pre-release

3.0.0 is the latest major revision of CircuitPython and features new support for the SAMD51 (aka M4) and preliminary support for the nRF52 BLE chipset. It also features better memory utilization so more can be loaded in the same amount of space.

Alpha!

This is the first alpha release of 3.0.0. Alpha releases do not have the complete API from 2.x and are only meant for testing. (Beta release will have the full API but still need work.) Please use the latest stable release when first starting with CircuitPython. It is stable.

When you find a bug please check the current known issues and file an issue if something isn't already known.

Installation

To install follow the instructions in our new 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).

All builds except ESP8266 are available as both UF2 and bin files here along with test builds.

New Features

Breaking Changes!

  • ustruct has been replaced with struct to match CPython.
  • The mpy format has changed so make sure and use a 3.0.0 bundle for libraries.

Thanks

Thank you to all who used, tested, contributed, helped out, and participated on GitHub and/or Discord:
@ladyada, @dhalbert, @tannewt, @microbuilder, @arturo182, @jamesadevine, @tralamazza, @hathach, @glennrub, @siddacious, @deshipu, @tdicola, @mrmcwethy, @willingc, @sommersoft, @deanm1278, @jerryneedell, @stewmystre, @boneskull, @Sigafoos, @brentru, @caternuson, @process1183, @Andon-A, @asherlie, adamwolf, dastels, @hukuzatuna, @KurticusMaximus, nis, BravoDelta, aj_nys, @wolf and surely more we have missed. Join us on the Discord chat to collaborate.

Documentation

Documentation is available in readthedocs.io.

Here are all the changes since 2.2.3.

This release is based on MicroPython 1.9.3. Support upstream MicroPython by purchasing a PyBoard (from Adafruit here).

Troubleshooting

Check out this guide for info on common problems with CircuitPython. If you are still having, then post to the Adafruit Support Forums and join Discord.

Note: 3.0.0-alpha.1 was tagged long ago to give builds a number so we're already on alpha 2! Yay free numbers!

Assets 17
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CircuitPython 2.2.3

06 Feb 00:39
@tannewt tannewt
2.2.3
b6114d1
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CircuitPython 2.2.3

Another small release for new boards! This has one fix for the ItsyBitsy M0 and pIRkey upcoming boards. Other boards don't actually need to be updated.

Installation

To install follow the instructions in our new 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).

All builds except ESP8266 are available as both UF2 and bin files here along with test builds.

Use the mpy-cross executables below to pre-compile .py files to .mpy files. You might need to do this if your .py file is too large to compile on the board. Details here. The 2.2.0 mpy-cross versions are still compatible with this new release.

Changes since 2.2.1

  • @ladyada added one fix for the upcoming ItsyBitsy M0 Express.
  • @ladyada added pIRkey support.

Thanks

Thank you to all who used, tested, contributed helped out, and participated on GitHub and/or discord:
@ladyada, @dhalbert, and surely more we have missed. Join us on the Discord chat to collaborate.

Documentation

Documentation is available in readthedocs.io.

Here are all the changes since 2.2.1.

This release is based on MicroPython 1.9.2. Support upstream MicroPython by purchasing a PyBoard (from Adafruit here).

Troubleshooting

Check out this guide for info on common problems with CircuitPython. If you are still having, then post to the Adafruit Support Forums and join Discord.

Note: 2.2.2 was incorrectly tagged so we've moved onto 2.2.3! Yay free numbers!

Assets 19
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CircuitPython 2.2.1

23 Jan 22:19
@tannewt tannewt
2.2.1
544b9e4
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CircuitPython 2.2.1

This release is identical to 2.2.0 with a couple additional supported boards and a doc fix.

Installation

To install follow the instructions in our new 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).

All builds except ESP8266 are available as both UF2 and bin files here along with test builds.

Changes since 2.2.0

Documentation

Documentation is available in readthedocs.io.

Here are all the changes since 2.2.0.

This release is based on MicroPython 1.9.2. Support upstream MicroPython by purchasing a PyBoard (from Adafruit here).

Thanks

Thank you to all who used, tested, contributed helped out, and participated on GitHub and/or discord:
@deshipu, @kattni, @ladyada, @tdicola, and surely more we have missed. Join us on the Discord chat to collaborate.

Assets 14
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