This is a 5.0.0 Release Candidate — please test
This is release 5.0.0-rc.1 (Release candidate 1). If this release does not have show-stopper issues, it will be re-released as 5.0.0, the first 5.x.x stable release.
If you find a bug please check the current known issues and file an issue if something isn’t already known.
5.0.0
5.0.0 is the latest major revision of CircuitPython. It features many improvements and enhancements to displayio
, including grayscale OLED and e-paper displays, extensive additions and improvements to BLE support, support for the STM32F4, iMX RT10xx and Sony Spresense microcontroller families, and PWM audio support.
Download from circuitpython.org
Downloads are available from circuitpython.org! The site makes it easy to select the correct file and language for your board. The downloads page is here. Downloads are no longer available from the GitHub release pages because of the large number of files for each release.
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).
New Features, Updates, and Fixes Since 5.0.0-rc.0
i.MX
- Fix I2C clock speed on i.MX boards. Thanks @mubes.
- Freeze
adafruit_requests
andadafruit_esp32spi
libraries into mimxrt1011 builds to save RAM. Thanks @arturo182.
Other board-specific fixes
- Arduino M0 boards now have both
.bin
and.uf2
downloads available. Thanks @dhalbert, and thanks to @fgallaire for pointing out the issue.
Build infrastructure
- Release download links available at https://circuitpython.org/downloads now point to AWS S3 instead of to GitHub release assets. Thanks @dhalbert, @jwcooper, and @sommersoft.
New Boards
Find downloads for all boards, including these, at https://circuitpython.org/downloads.
New Since 5.0.0-rc.0
None.
Breaking Changes and Deprecations from 4.x
- 5.0.0 improves our internal filesystem definitions and may overwrite your existing files so make sure to back them up before updating!
- The
bleio
module has been renamed to_bleio
to indicate that it is meant to be used only for writing BLE libraries, and that its API may change between CircuitPython minor versions. There are many incompatible changes in_bleio
since 4.0.0. Please use the latestadafruit_ble
library for end-user BLE programming. - The
displayio
refresh API has been revamped to be simpler.wait_for_frame
andrefresh_soon
have been removed. In both 4.x and 5.x, auto refresh will automatically refresh the display so they can be removed. The newauto_refresh
property andrefresh()
function can be used to control when the screen refreshes and at a specific rate. - Moved
audioio.Mixer
toaudiomixer.Mixer
, which is only available on M4s. Movedaudioio.RawSample
, andaudioio.WaveFile
to the new moduleaudiocore
. However, for backwards compatibility, they are still available inaudioio
. They will be removed fromaudioio
in 6.0.0. Thanks @jepler. - Added
I2C.writeto_then_readfrom()
. Deprecatestop=
arg which will be removed in 6.x. UseI2C.writeto_then_readfrom()
instead. - Removed
re
from CircuitPlayground Express Display build. - Removed
gamepad
from CircuitPlayground Express Crickit build.
Known Issues
displayio
operations that read from an SD card (e.g.,OnDiskBitmap
) will interfere with other SD card operations and can cause lockup. To work around this problem, do not read or write files on the SD while the display is updating, and vice versa.- See https://github.com/adafruit/circuitpython/issues for other issues.@
Thanks
Thank you to all who used, tested, contributed, helped out, and participated on GitHub and/or Discord, including @arturo182, @bmeisels, @DavePutz, @dhalbert, @fgallaire, @hierophect, @jamesbowman, @jepler, @ladyada, @lgnashold, @maholli, @makermelissa, @mubes, @neubauek, @pdp7, @rhooper, @tannewt, @ATMakersBill, @AndrewTribble, @Anne B, @Antonio, @CGrover, @CarlFK, @Curt Olson, @Dar, @DaveP, @DavidGlaude, @DudeImOnly6, @Duewester, @KingerNorth, @SouthernDragon, @TG-Techie, @ThomasAtBBTF, @adafruit, @anecdata, @brentru, @cater, @charlesburnaford, @codeNSolder, @deshipu, @dherrada, @diegoMini+, @ednl, @foamyguy, @geekguy, @graham, @hexthat, @jasonp, @jerryn, @kattni, @kjw, @madbodger, @marius_450, @mscosti, @ntoll, @siddacious, @sommersoft, @stargirl, @timvictor, @v923z 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 5.0.0-rc.0.
This release is based on MicroPython 1.9.4 @25ae98f. 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 issues, then post to the Adafruit Support Forums and join Discord.