I have a Roku streaming stick+ that will be domiciled in my media room and distributed out to the other rooms in my house. I am using the URC system to control the distribution. Is there a way to control this Roku stick via the IP address? Meaning I could program my universal remote to turn on the Roku via the IP address, not using IR since the streaming stick is not compatible with IR.
No Roku supports control over IP, with a caveat. The Roku app (Android or iOS) allows controlling your Roku over your network as long as they are both on the same network subnet. You might call that IP control, but it requires their (free) app to do it. I've never heard of anyone using any other networked remote.
Dan Roku Stick (3600), Ultra (4640), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.