I went overboard with my Raspberry PI and temperature sensors a couple of years ago. I hooked a bunch of sensors up to old wiring in the house that a previous owner had used for a security system. And while I was at it, I hooked up an old crank-telephone so I could remotely ring the bells, play "The Raspberries" on the handset, etc. It's not all operational anymore, but the DS1820b temperature sensors are. It's surprising how sensitive they are. By watching a graph, you can see when the heater or AC runs, when someone takes a shower, when the garage door opens, when a car is in the garage, etc.
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I went overboard with my Raspberry PI and temperature sensors a couple of years ago. I hooked a bunch of sensors up to old wiring in the house that a previous owner had used for a security system. And while I was at it, I hooked up an old crank-telephone so I could remotely ring the bells, play "The Raspberries" on the handset, etc. It's not all operational anymore, but the DS1820b temperature sensors are. It's surprising how sensitive they are. By watching a graph, you can see when the heater or AC runs, when someone takes a shower, when the garage door opens, when a car is in the garage, etc.
http://buzbee.asuscomm.com:8100/