Universal Media Server | Forum

You need something to control the playback, UMS isn't really suitable for that purpose. If you have an Android phone, I'd recommend testing BubbleUPnP. By using it, or something similar, you can control the dongle and connect to UMS.

If the dongle doesn't have a remote control (or some other way to control it), you need a separate controller. In UPnP/DLNA there are some basic concepts: server, controller and renderer. UMS is a "server", but by clicking on the renderer icon you get a very rudimentary "controller" as well. It sounds like your dongle only fills the "renderer" role. Usually, playback devices are both "renderer" and "controller". BubbleUPnP can function as a "controller", so that you have all the pieces

I can't really recommend anything, and I'm very skeptical to recommend a Google or Apple product because they spy on everything you do (I know Apple is trying to play "innocent", but I don't buy it for a second). That said, if you don't mind the surveillance, the Chromecast might do what you want. It will allow you to "cast" content from Chrome (which also forces you to use Chrome, which also spies on everything you do), or from any Android device. Anycase, Miracast etc are really just "China clones" of the Chromecast, but the Chromecast itself is still very cheap, so I don't quite see the point. Google sells it very cheap because they know that they can earn much more money from registering people's watching habits and by pushing their own content.

When it comes to non-spying devices, I really don't know - I've been looking for that myself, but it's very hard to find these days - and to know who you can trust.