Instructables user electronichamsters has created a home monitoring system using RaspberryPi, Arduino, and OpenHAB.

…Tinkering eventually lead to making this full blown home automation system based on open source hardware (Arduino) and open source software (OpenHAB). I know I know, yet another “Arduino Home Automation” project, right? But I promise I’m not going to turn on a light from a smart phone. I’m more focused on extensive networked sensors, timely alerts, and aesthetically appealing presentation of events.

Here’s the basic idea. With Arduino, it’s really easy to connect boatloads of cheap sensors. Using this setup, that boatload of cheap sensors can now be on the internets. They can email you when things get too hot, too cold, too smokie, too gassy, or too bright. And your dog can email you by barking. You can also view the status of sensors on your smart phone. These sensor nodes are wireless, so you’re not constrained by the location of ethernet ports.

Learn how to make specific sensors or read the full guide

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