CircuitPython is a derivative of MicroPython designed to simplify experimentation and education on low-cost microcontrollers. It makes it easier than ever to get prototyping by requiring no upfront desktop software downloads. Simply copy and edit files on the CIRCUITPY flash drive to iterate.

The following instructions will show you how to install CircuitPython. If you've already installed CircuitPython but are looking to update it or reinstall it, the same steps work for that as well!

Set up CircuitPython Quick Start!

Follow this quick step-by-step for super-fast Python power :)

Download and save it to your desktop (or wherever is handy).

Plug your Hallowing M4 into your computer using a known-good USB cable.

A lot of people end up using charge-only USB cables and it is very frustrating! So make sure you have a USB cable you know is good for data sync.

Double-click the Reset button next to the USB connector (magenta arrow) on your board, and you will see the four NeoPixel RGB LEDs (green arrows) turn green. If they turn red, check the USB cable, try another USB port, etc. Note: The little red LED next to the USB connector will be dim red, and the little yellow LED on the opposite side will flash yellow. That's ok!

If double-clicking doesn't work the first time, try again. Sometimes it can take a few tries to get the rhythm right!

You will see a new disk drive appear called HALLOM4BOOT.

Drag the adafruit_circuitpython_hallowing_m4_etc.uf2 file to HALLOM4BOOT.

The LED will flash. Then, the HALLOM4BOOT drive will disappear and a new disk drive called CIRCUITPY will appear.

If you haven't added any code to your board, the only file that will be present is boot_out.txt. This is absolutely normal! It's time for you to add your and get started!

That's it, you're done! :)

This guide was first published on Sep 19, 2019. It was last updated on Dec 08, 2023.

This page (CircuitPython) was last updated on Sep 18, 2019.

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