# Check Device Core for Unused Parameters

If you have a Config, and would like to know what parameters aren't mapped to a config, is that easy to check in Reactor after version 2.0.2.

Open Home Screen of Reactor

Click the Device Core settings:[![image.png](https://wiki.skaarhoj.com/uploads/images/gallery/2024-01/scaled-1680-/gtlimage.png)](https://wiki.skaarhoj.com/uploads/images/gallery/2024-01/gtlimage.png)

Open Parameter List:[![image.png](https://wiki.skaarhoj.com/uploads/images/gallery/2024-01/scaled-1680-/JOuimage.png)](https://wiki.skaarhoj.com/uploads/images/gallery/2024-01/JOuimage.png)

Add "?configcheck=true" after the address:[![image.png](https://wiki.skaarhoj.com/uploads/images/gallery/2024-01/scaled-1680-/BO5image.png)](https://wiki.skaarhoj.com/uploads/images/gallery/2024-01/BO5image.png)

Now the parameter list shows what Parameters are added to the config, and who isn't:

[![image.png](https://wiki.skaarhoj.com/uploads/images/gallery/2024-01/scaled-1680-/c5eimage.png)](https://wiki.skaarhoj.com/uploads/images/gallery/2024-01/c5eimage.png)