So, you have Roon installed and are able to play music with interface, but you are not sure how to activate your wireless endpoints? Is this correct?
If correct, go into Settings in the Roon menu (3 lines on top left on Roon interface). Within Settings, you’ll find Storage tab to set up library. Under Audio tab you can see and enable your endpoints. Under About tab is information about the core computer, including IP address, etc.
on what machine did you install the core (spec, OS, …)?
how is that machine connected to your LAN / network (wifi, ethernet)
how are you trying to connect to the machine containing the Roon Core (tablet, laptop, …)?
If, on another windows machine, you open Windows explorer and click on ‘Network’ (usually bottom right). it will list all active machines on your local network.
Also: if you installed ROCK (as I did), you can open any web browser on another computer on the same network and type //ROCK/, which takes you to the settings page.
Finally, if none of the above applies to you and you don’t know the IP address of the Core machine, install a free Network review app like FING on any PC ( www.fing.com ) which will tell you everything you need to know about any device on your network.
Like I said at the start: please provide as many details about your current setup and config so that we may better assist you with this. The Roon support team will ask these questions as well.