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CircuitPython 1.0.0 Release Candidate 1!

From the GitHub release page:

We’re close to our first stable release! If we don’t find any bugs with this we’ll launch it as 1.0.0! This release itself has a number of small improvements and bug fixes. Further release candidates will be made from the stable branch.

This release is based on MicroPython 1.8.7.

Change highlights since 0.10.1:

  • shared-bindings: Move the DigitalIO related enum-like classes from inside DigitalInOut into digitalio directly. This requires a code change! For example, digitalio.DigitalInOut.Pull.UP becomes digitalio.Pull.UP.
  • shared-bindings: Rename directions from IN and OUT to INPUT and OUTPUT to match Arduino.
  • shared-bindings: Allow changing DigitalInOut direction through the property in addition to the switch_to_* methods. For example:
import digitalio
import board
led = digitalio.DigitalInOut(board.D13)
led.direction = digitalio.Direction.OUTPUT
  • atmel-samd express: Enable ure, center, partition, frozenset, splitlines, and reversed. Thanks @dhalbert!
  • atmel-samd: Fix stack checking because it was broken with LTO. Thanks @dhalbert!
  • atmel-samd: A number of PWMOut fixes. Thanks @ladyada for the testing!
  • atmel-samd: Fix bug in REPL history handling.
  • atmel-samd: Change PID for CircuitPlayground Express and Metro M0 Express.
  • CircuitPlayground Express: Allow the user to initiate safe mode by holding both A and B buttons while power cycling the chip.

To install, download a .bin file and follow the guide here for M0 and here for ESP8266.

Have a Feather M0 Express or Metro M0 Express? Download a .uf2 and follow these instructions. To install our libraries simply download the latest bundle and copy the lib folder onto your CIRCUITPY drive.


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.

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