How can I use Samsung HW-S61B?

Configuration
1

As part of a morning automation I want to play sound on Samsung HW-S61B. In the Samsung SmartThings App I see the sound can come from two sources

  • D-IN/TV ARC
  • Bluetooth

Although the soundbar has a WIFI mode I dont see the benefit so far.

  1. I managed to play sound by using the Google Cast and the TV. This just works when the TV is on. How can I turn on the TV?
  2. Is there a way to just use the soundbar without the TV?

As you may see I am new in this business.