SparkFun Qwiic Micro (SAMD21E) Hookup Guide
M-Short
Elias The Sparkiest
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Reinstalling CircuitPython
If you've installed CircuitPython but have decided to use Arduino instead, but then decided to use CircuitPython again (make up your mind), then use the following instructions to reinstall CircuitPython onto the SparkFun Qwiic Micro. I'll assume you know where to get the CircuitPython firmware files since you had to follow the instructions to install CircuitPython to get to this point. Hint: there in the Installing CircuitPython section above.
Reset Board to Bootloader
We want the board to reset to the UF2 bootloader (which as mentioned above) enables the board to act like a flash drive. After plugging the SparkFun Qwiic Micro into your computer, double tap the reset button. If done correctly, the board will pop up as a removable drive titled Qwiic Micro and the D13 LED will have a slow breathing pattern. Now it's just a matter of dragging the .uf2 Circuit Python file into the Qwiic Micro window. It will close and re-open in a window now titled CIRCUITPY.