This is hopefully the last beta build of 4.0.0 before release candidate. There are still issues to fix before stable and the new APIs may evolve a bit more. Please use the latest 3.x stable release (available from the new website!) when first starting with CircuitPython. It is stable.
4.0.0 is the latest major revision of CircuitPython. It features:
- a port to the Nordic nRF52840 microcontroller, including support as a BLE beacon or peripheral (
- extensive new support for pixel-based displays (
- USB MIDI support
- messages translated into multiple languages
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 Beta 3
positionin TileGrid with separate
yto make it consistent with Group. This will require code and library updates. Thanks to @tannewt
- Remove networking support from Feather M0 Express and Metro M0 Express. Thanks to @tannewt
- Add Pirate language support. Thanks to @sommersoft
- Updates to pewpew10 and ugame10. Thanks to @deshipu
- Group now takes
ykeyword args for initial position. Thanks to @tannewt
- Add support for changing tile indices in TileGrid using . Thanks to @tannewt
- atmel-samd: PWM fix allowing for more outputs to work. Thanks to @dhalbert
- Add checks to prevent modifying the filesystem when read-only such as moving a file. Thanks to @tannewt
Breaking Changes from 3.x!
errnoto reflect that they are subsets of the CPython library modules. Thanks to @dhalbert.
- busio.UART breaking changes to match PySerial. Thanks to @dhalbert
- busio.UART constructor timeout parameter is now in seconds instead of milliseconds.
- UART.readinto(buf) now does not allow an optional length parameter
- UART.write(…) no longer allows strings to be written. The bytes written must be bytes or bytearray or an array.array.
framebufhas been removed.
displayiois its replacement, and will be enhanced after 4.0 to include
framebuf‘s functionality. Thanks to @tannewt.
structcompatibility with CPython by enforcing stricter types. This may break your code! Thanks to @dhalbert.
Thank you to all who used, tested, contributed, helped out, and participated on GitHub and/or Discord:
@adafruit, @anecdata, @arofarn, @arturo182, @ATMakersBill, @brennen, @brentru, @bwshockley, @C47D, @CarlFK, @carlosperate, @caternuson, @CedarGroveStudios, @chalei, @charlesbunaford, @cpforbes, @dastels, @deshipu, @dhalbert, @dsiee, @edspark, @eighthree, @furlaneto, @gcvasconcelos, @glennrub, @gpshead, @hathach, @iraytrace, @Jahor, @jasonp, @jepler, @jay Doscher, @jerryneedell, @jimblom, @johnpark, @JoshuaLowe1002, @uanita, @kattni, @kevinjwalters, @klardotsh, @Klowner, @ladyada, @larsks, @madbodger, @maholli, @Makdaam, @makermelissa, @MattyT, @mchobby, @microbuilder, @MikeBarela, @Mr. Certainly, @mrmcwethy, @nickzoic, @notro, @oldcrow, @penguindustin, @PhredFL, @platipo, @Retoc, @rhooper, @sabas1080, @sajattack, @sajattack, @saspa, @schmarty, @Senuros, @ShawnHymel, @siddacious, @sommersoft, @SouthernDragon, @TangoJuliett, @tannewt, @Tasm-Devil, @TG-Techie, @uhrheber, @urish, @vgoodwinv, @xpecex, @yeyeto2788, @jreese and surely more we have missed. Join us on the Discord chat to collaborate.
Documentation is available in readthedocs.io.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell with Google Hangouts On-Air is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
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