On videos you can see how to control volume on Hi-Fi receiver and control lights with voice.

Under the video are links and description how I made this.

Everything is very simple and without coding;)

Step 1: Turn ON/OFF Lights With Smart Watch

ImperiHome app

and

Light manager

I have previous version. I use it to control lights with IR remote - Logitech Harmony One, and the lights wake me up at morning:)

Step 2: How to Change Volume on Hi-Fi With Smart Watch

MyAV TV app

Works with almost any receiver with ethernet or wifi connection.

Just install and that's it:)

App have some "bug" (I think). Like you can see on video, app opens on phone when you use it on watch.