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 drive to iterate.

CircuitPython Quickstart

Follow this step-by-step to quickly get CircuitPython running on your board.

Verify which version of the Feather ESP32-S3 you have before downloading CircuitPython below!

Below are links to CircuitPython for the Feather ESP32-S3 No PSRAM and the Feather ESP32-S3 4MB Flash 2MB PSRAM. Be sure to choose the one that matches your board.

Click the link above to download the latest CircuitPython UF2 file.

Save it wherever is convenient for you.

Plug your board into your computer, using a known-good data-sync cable, directly, or via an adapter if needed.

Double-click the reset button (highlighted in red above), and you will see the RGB status LED(s) turn green (highlighted in green above). If you see red, try another port, or if you're using an adapter or hub, try without the hub, or different adapter or hub.

For this board, tap reset and wait for the LED to turn purple, and as soon as it turns purple, tap reset again. The second tap needs to happen while the LED is still purple.

If you do not see the LED turning purple, you will need to reinstall the UF2 bootloader. See the Factory Reset page in this guide for details.

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

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

You will see a new disk drive appear called FTHRS3BOOT.



Drag the adafruit_circuitpython_etc.uf2 file to FTHRS3BOOT.

The BOOT drive will disappear and a new disk drive called CIRCUITPY will appear.

That's it!

This guide was first published on Apr 20, 2022. It was last updated on Jul 19, 2024.

This page (CircuitPython) was last updated on Mar 08, 2024.

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