Extensions

Extensions allow you to connect to hardware devices or web services. To add an extension, go to the More Blocks palette.

IMPORTANT: Install the Plug-In

You'll need to install a plugin to use Scratch with a hardware device. Choose the plugin to download based on your computer and the web browser you use for Scratch. If you use a browser other than Chrome, choose one of these two options:

If you use the browser Chrome, you will need to download and install two pieces of software:

You will need administrator access on your computer to install the plugin.

Status: Hardware Devices

Red light means that the browser plugin has not been installed.

Yellow light means that the device is not connected or detected.

Green light means the device is ready to go!

Troubleshooting
If it's not working, try: