Use GSMRC to control your infrared devices remotely by sending SMS.
You can turn on/off air conditioner (any infrared controlled device) remotely, when you are out of home - just send SMS "click" to Android connected to Arduino with bluetooth HC-05 and infrared transmitter
You can get instructions for Arduino hardware schema and download Arduino C sketches here:
http://gsmrc.blogspot.com/p/index.html
Let me know if you have any questions
Multiple infrared buttons support.
Reconnect on loose Bluetooth connection.