Hi,
i've recently watched the great arduino documentation and since then i thought of an arduino based home automation system.
Now i'm planning in the planning stage(i haven't bought anything because i think it's better to have a good plan and then build everything )
My main interest is to have nearly the same functionality like other home automation system, but it should be less expensive, expandable and open source.
So now i want to explain my plan and i'm hoping for much feedback!
The head of the system should be an arduino one with ethernet shield and wifi(or xbee if it's also secure).
This head provides a json compatible webinterface which do all controlling.
Then in each room is a another arduino board(don't no which one would fit it needs) it has also wifi/xbee on it but also bluetooth(mainly because bluetooth shields cost less money).
These "room master" are for example mounted at the light bulb to control it and mainly are xbee to bluetooth relays.
Last but not least we have the "stupiest" arduino boards only with bluetooth shields. These stupid clients are for switching light, getting sensor information and much more(expandable of course )
At first it sounds more expensive than other systems because of the relays but with each (stupid)controller the cost of an xbee/wifi version grow rapidly
Now what do you think? Possible or not/clever or not?