CircuitPython 6.1.0 Beta 1 released!

From the GitHub release page:

This is the second beta release of 6.1.0. (This first was broken.) It includes many changes that were done while 6.0.0 release candidates were in pre-release. Please use 6.0.x if you need a stable version of CircuitPython on all ports except ESP32-S2. Please use this release or newer for the ESP32-S2. See port status below for more stability details.

Download from

Downloads are available from 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.


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).

Port status

CircuitPython has a number of "ports" that are the core implementation for a variety of microcontroller families. Stability varies on a per-port basis. As of this release, atmel-samd, nrf, and stm for the F4 family are stable. cxd56, esp32s2, and stm for other chip families are being actively improved but may be missing functionality and have bugs. litex and mimxrt10xx are in an alpha state and will have bugs and missing functionality. For all unstable ports, please use the latest pre-release.

New features and improvements since 6.0.0

All ports

  • Added grayscale E-Ink support. (IL0373 control chip.) Thanks to @tannewt
  • Added support for transparent_color support in ColorConverter. Allows transparency with full color bitmaps. Thanks to @jensechu
  • Fix accumulating tracebacks in REPL. Thanks to @DavePutz
  • Luma computation for grayscale conversion corrected. Thanks to @tannewt
  • Fixed unhiding a TileGrid. Thanks to @FoamyGuy
  • Fixed sharp memory display memory error. Thanks to @jepler
  • Added native binascii to most boards. Thanks to @dhalbert
  • README typo fix. Thanks to @ehagerty
  • Stub (.pyi) fixes and CI check added. Thanks to @sw23
  • Translation updates for French, Portuguese (Brazil), and Swedish. Thanks to @bergdahl, @Edrig, @hexthat, @jepler, and @wtuemura.


  • Fix TLS certificate errors when root certificate is signed by SHA-1. (Fixes and others.) Thanks to @jepler, @tannewt and @bennyE
  • time.sleep() can now be interrupted by CTRL-C. Thanks to @DavePutz
  • touchio, rotaryio, watchdog, and countio support added. Thanks to @microdev1
  • canio support added. Thanks to @jepler
  • Added more Network parameters. Thanks to @astrobokonon
  • Fix I2C crashing. Thanks to @jepler
  • Fixed brief AP mode when starting wifi. Thanks to @BennyE
  • Fixed stack size. Thanks to @jepler
  • Fixed Socket.recv behavior to return available bytes immediately when fewer than requested. Thanks to @tannewt
  • Fixed concurrent NeoPixel strip use. Thanks to @hierophect and @ladyada
  • Fixed wifi reset. Thanks to @astrobokonon
  • Add recv_into argument size check. Thanks to @gamblor21
  • Added native display init for MagTag eInk display. Thanks to @tannewt and @ladyada
  • Fixed SCL and SDA pins for UnexpectedMaker FeatherS2. Thanks to @askpatrickw
  • Add default SPI, UART and I2C busses for UnexpectedMaker FeatherS2 and microS2. Thanks to @FoamyGuy and @microdev1
  • Added IO pin naming to Metro ESP32-S2. Thanks to @kattni and @ladyada
  • ESP32-S2 README improvements. Thanks to @hierophect

See the 6.0.0 release notes for breaking changes since 5.x.

New boards since 6.0.0

  • Adafruit MagTag Thanks to @tannewt
  • Targett Module Clip WROOM Thanks to @targett363
  • Targett Module Clip WROVER Thanks to @targett363
  • AtelierDuMaker Breakout NRF52840 v1 Thanks to @Edrig

Known issues

  • We are not aware of any show-stopper issues.
  • See for other issues.


Thank you to all who used, tested, and contributed since 6.0.0. Join us on the Discord chat to collaborate.


Documentation is available in

This release is based on MicroPython 1.9.4 @25ae98f. Support upstream MicroPython by purchasing a PyBoard (from Adafruit here) or sponsoring MicroPython on GitHub.


One important feature of CircuitPython is translated control and error messages. With the help of fellow open source project Weblate, we’re making it even easier to add or improve translations. Sign in with an existing account such as Github, Google or Facebook and start contributing through a simple web interface. No forks or pull requests needed!


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.


Builds are no longer stored as assets on this release page, because there are too many of them. Please see the Download from section above.

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