If you are having trouble connecting your Go Direct® Force and Acceleration Sensor (GDX-FOR) to your Scratch 3 project, try the following:
1. Make sure the Force and Acceleration Sensor is turned on; the Bluetooth LED should be flashing red.
2. Verify that your device is compatible with the Scratch Link app (PC/Mac) and running. If you are on iOS, Android, or ChromeOS, verify that your device is compatible with the Scratch App; the Force and Acceleration Sensor extension will not run in the web editor on these devices, the app is required.

NOTE: If you haven’t updated Scratch Link you may need to uninstall your version and reinstall the latest version in order for this connection to work.

3. Check that the Force and Acceleration sensor is not already connected to another Scratch project or to another app, such as Graphical Analysis app. If it is already connected, its Bluetooth LED will be flashing green.

4. If you still have trouble connecting your sensor, try restarting your computer.

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Scratch 3 and Go Direct Sensors FAQ and Troubleshooting
How do I connect my sensor to Scratch 3?

Published: April 18, 2019. Updated: July 6, 2023.