I have fallen over the home monitoring and control cliff ,
I'm building an outdoor reset thermostat based on this fellows system
Steam enthusiasts outdoor reset thermostat
Integrating
Phidget sensors With an Arduino and
Xbee mesh wireless modules..
Right now Im just collecting data, and learning the heat loss curve for my house which has an slightly oversized steam boiler. I have been able to wirelessly control a circulator pump with what I have built, but have returned all control to the main house thermostat while I work out the Heat loss equations and write some code to control the burner and pumps (on a hot water loop zone). Currently I have inputs for: outdoor temp, indoor temp in three locations, boiler pressure oz/in^2, boiler water temp, and energy usage for the burner
Sorry rambly and slightly OT but I am also using extra inputs to monitor the electrical usage of the burner and pump, fridge etc...
I started my learning about home monitoring when I found
Tweet-a-watt made from a Kill-a-watt.. send energy usage via twitter
My programming skill set is from the Pascal/Delphi generation so this whole exercise is a pretty nice learning experience