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7. Advanced Techniques > 100. Which Way Did She Go?

Which Way Did She Go?

Combine a few motion detectors and some simple logic to teach your home how to anticipate what you want to happen next.

A hallmark of a good home automation system is the ability to predict what people are about to need and take care of it for them, such as a light coming on in a dark room right before a person enters and then turning it off shortly after she departs. An essential ingredient to this type of automation intelligence is detecting in which direction she is going. Is she:

  • Walking up the sidewalk toward the house, or away from it?

  • Climbing up the stairs, or down them?

  • Walking down a hall toward the bedroom, or up the hall away from the bedroom?

This might sound like a complicated problem that would require video cameras and sophisticated visualization software to solve, but in reality, you can determine all of these things fairly accurately using two inexpensive X10 motion detectors [Hack #6].


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