you can control any device with this application using any micro controller like Arduino , pic , avr, raspberry pi , stm 32 or any other using HC05 and HC06
device 1 will send - ac on and ac off
device 2 will send - fan on and fan off
device 3 will send - light on and light off
device 4 will send - TV on and TV off
all on /off will send - all on and all off

special features :-
1- you can save you blue tooth device id for auto connect feature
eg.00:19:10:09:0E:50
2 - your mobile screen will not turned off while you are using app.
3 - you can also connect manually without save any id.