Nice! I had the same idea for my dumb speakers, except that i somehow want to detect my chromecast-audio is not playing/is playing. I used to do this with a re

Nice! I had the same idea for my dumb speakers, except that i somehow want to detect my chromecast-audio is not playing/is playing. I used to do this with a relay connected to 5v usb of my tv. But i got rid of my tv.