'Switch level class' + 'Music player class'
///////////
name of event:
-"on"
-used in:
-'Switch class' + 'Relay switch class'
-///////////
-name of event:
-"off"
-used in:
-'Switch class' + 'Relay switch class'
-///////////
-name of event:
"temperature"
used in:
'Temperature measurement class' + 'Thermostat class'