Installing CircuitPython on SAMD21 Boards
The Microchip's ARM® Cortex®-M0+ based ATSAMD21 microcontroller is gaining in popularity, and that's good news for everyone! This powerful little chip is capable of running CircuitPython. Some SAMD21 boards, like the Circuit Playground Express, ship with the ability to run CircuitPython. Others, however, require a little more work to get CircuitPython running on them. This tutorial will show you how to load the UF2 bootloader and install CircuitPython on several SAMD21-based boards.