The first project in line is a thermostat for my house. I want the usual stuff, programmable temperature and timing. But I also want to log the measured temperature and watertemperature of the heater. Maybe, if I have enough data I can optimize the system for efficiency and comfort. I am also thinking about using my BT phone as a proximity switch. So, when I leave home, the heater will switch off and when I enter the house it will switch on. Oh, and the thermostat is going to be wireless of course.