CircuitPython 2.3.1 fixes a regression introduced in 2.3.0: if boot.py changed the root filesystem permission to read/write using storage.remount(), that permission change would get undone. This bug would prevent some data logging code from working, for instance.
All other changes introduced in 2.3.0 are still present: battery power fix, storage.erase_filesystem(), and new frozen libraries for Circuit Playground express. Refer to the 2.3.0 release for details.
The 2.2.0 mpy-cross executables in this release work fine with all 2.x releases.
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.