4.0.0 is the latest major revision of CircuitPython and features support for the nRF52840 BLE chipset, display support and translated messages.
Alpha!
This is the first alpha release of 4.0.0. Alpha releases do not have the complete API from 3.x on the nRF builds and are only meant for testing. (Beta release will have the full existing 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).
Most builds are available as both UF2 and bin files here along with test builds.
New Features
- nrf: Adds nrf52840 USB support. Thanks @hathach, @arturo182, @dhalbert and @jerryneedell.
- Adds translated messages for German (de_DE), French(fr), Spanish (es) and Tagalog (fil). English is available as en_US. Thanks to @turbinenreiter, @arofarn, Pierrick C, @C47D, @eighthree, and @tannewt.
- atmel-samd: Adds support for Grand Central M4 Express, Hallowing M0 Express and Trellis M4.
- Adds
displayioto manage displays. Thanks to @tannewt, @jedgarpark, @ladyada and @dhalbert. - Adds dynamic VM memory management by changing stack size with
supervisor.set_next_stack_limit. Thanks to @tannewt and @dhalbert.
Breaking Changes!
None so far.
Thanks
Thank you to all who used, tested, contributed, helped out, and participated on GitHub and/or Discord:
@ladyada, @dhalbert, @tannewt, @kattni, @microbuilder, @arturo182, @tralamazza, @hathach, @glennrub, @siddacious, @deshipu, @sommersoft, @jerryneedell, @brentru, @caternuson, @dfarning, @jepler, @PaulKierstead, @notro, @Jahor, @Makdaam, @mrmcwethy 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 3.0.2.
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, then post to the Adafruit Support Forums and join Discord.