Seems like BT remote, have a look here. This script is alomst fool proof.
You can define the volumio commands to a button, like:
command = 'volumio toggle'
command = 'volumio previous'
command = 'volumio next'
command = 'volumio seek plus'
command = 'volumio seek minus'
command = 'volumio volume minus'
command = 'volumio volume plus'
command = 'volumio clear'