Mu is a simple Python code editor for beginner programmers. It looks like this:

Mu Editor GIF

Installing Mu on Windows or Mac

The first step is to download the latest version of Mu from

If you are using Windows, you must be running Windows 7 or higher. For macOS you must be running 10.12 (Sierra) or higher.

Using Mu

Mu attempts to automatically detect a Circuit Playground Express plugged into a computer. Before starting Mu, please plug in your CircuitPlayground Express and make sure it shows up as a CIRCUITPY drive in your computer’s file explorer.

Once Mu is started, you will be prompted to select your mode. Please select “Adafruit CircuitPython”. The bottom bar show say that it detected a board.

Ok, let’s get started!

Mu Logo