Devialet Phantom Classic Bluetooth issue

[devinoob]

Have only tested Bluetooth to play from phone, not PC. I use UPnP and Ethernet with DOS1 and DOS2.

Also, Spark works in DOS1 on a PC. There is no equivalent in DOS2.

I solved the issue regarding the connection of my laptop to Spark. My firewall was blocking the app, it works now. 
How does this UPnP work?

  Thank you for your help )