The system here uses a cheap Arduino board, a few sensors, and a magnetic contact switch. It’s then hooked into the Adafruit IO and connected to IFTTT, so you can set up alerts in any way you like.

Now, IFTTT is ready to move beyond “if this then that,” so it’s introducing IFTTT Pro, which will allow users to create applets with queries, conditional logic and multiple actions.

I am an unabashed fan of IFTTT. That's "If Then That" to the uninitiated. It provides ways to connect different services. For example, you can use IFTTT to simultaneously upload a photo to ...