This project is to create a device which automatically controls the air conditioning in the unit I'm living in with my room mate. I wanted to create something for us, and this seemed fun. The project will not be managed, as it is purely for fun, and will only every result in a working prototype. Also, I can't be bothered going to the effort. Mostly, this is being done for convenience, but also to save power/the environment.
The project is likely to develop, but version 1 will be as described by the above requirements.
The above drawing shows the simple design, and the 4 required elements. I already own all the parts required to build these elements, and could have a working prototype quickly produced.