I have set up the node, and I can pause and start playback. But when I try to add a track (in my case a Norwegian web radio station, http://lyd.nrk.no/nrk_radio_alltid_nyheter_mp3_h.m3u I get an error message:
Error: HTTP response code 500 for "urn:schemas-upnp-org:service:AVTransport:1#AddURIToQueue"
I'm not infront of my computer but I'm not sure you can add a Radio Station to the queue, I thought you have to play it immediately.
The Nodes authors were very good at getting back to me when I raised some queries with them (although I never used the node for playing radio stations.
Hi, it seems that the TuneIn radio id for that station is "s25534".
You can use node-red-contrib-sonos-plus, node: manage-radio and set the payload as "play_TuneIn" and the topic as "s25534".
You can also add it to My Favorites and activate from there.
I'm afraid that doesn't help me, for the system to work (I have a unified system running every speaker and amp in the house) I need to use the URLs. But I finally found a way, using Home Assistant.