Control Electrical in Room
control wifi switch via mosquitto (mqtt server)
topic : room/1 ; room number 1 ; 1 = ON, 0 = OFF wifi switch receive message from mqtt
topic : room/1/status ; status (ON, OFF) wifi switch send status back to mqtt
topic : room/1/start ; start time
topic : room/1/stop ; stop time
topic : room/currenttime ; current time
topic : room/1/timer ; countdown timer