I have 3 push buttons (with a common wire). How do I connect them to control power, volume up, volume down of my Arylic Up2Stream Amp ?

 

Without any information about that amplifier being provided, you are certain to get only guesses, and probably most of them far off target.

 

Without any information about that amplifier being provided, you are certain to get only guesses, and probably most of them far off target.

True. How do I delete this post ?

 

To delete you simply select "edit" when you view it after posting.
BUT understand that you can also add a lot more information, if you have it. AS an alternative, if you have information about the remote capabilities of that amplifier, you could add that information.

 

I did get an answer from the Amp supplier, Arylic, but it only partially works.
Power on/off: ADC_KEY to GND works
Volume up: GPIO1 to GND works
Volume down: GPIO2 to GND don't work
Annoying.

 

It might be that GPIO to the processor "logic one" voltage may have some effect. OR is "GND" considered a "logic one"??