powerstate expects 0 for toggle standby, 1 for deep stanbdy, 2 reboot box, 3 restart gui */
sleeptimer expects cmd=set|get action=standby|shutdown time=minutes 1-999 enabled=True|False
vol expects a string containing up (increase by 5), down (decrease by 5), set<int> (set100) or mute for toogle mute state