all the things that are in the plugin …so if play / pause can do it, it should be possible to create.
look here for the power on / off …
finally I could try, the power off on gpio 3 and physical pins 5 and 6, it works but on restart the audio no longer works (I use an rpi2 with HiFiBerry Digi2 Pro), disabling the volumio plugin the audio is back, i will try other gpio with related physical pins, do you have any other suggestions? Thanks bye
Please have a look at my former post:
Post #16 shows how it can be done.