This is a common question in my house and I assume others too. Is there a system to track temperatures in multiple rooms? Cheaply? Free?
Nagios (http://www.nagios.org/) is pretty good a graphing it out over time but I can't think of paths to get the data from sensors into it. USB temperature sensors are cheap but limited to short distances so not helpful across a mid size house. I have lots of Cat-5 run but putting an Arduino in each room gets pricey. Adding in moisture sensors would be nice as then Nagios can be used to alert on thresholds. (Water sensed. Temp over/under 20 degrees. etc.)
Thoughts?
Sounds like a great Ben Heck show project!
