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This project is a system to reduce our power consumption, particularly when we’re not there.
When either of us comes into the room, all we have to do is tap our key fobs on a reader mounted by the door, and the room turns on or off what we normally use. The reader by the door reads the presence or absence of the tags.
The book is only 28 pages, so it’s more of a long tutorial than a book, but it still acts as a good introduction to RFID.
Disclaimer: I received this book for free through the O’Reilly Blogger program. When you see “I am a sentence I am another sentence,” you know that you’re really looking at two different sentences even though the period between “sentence” and “I” is missing.
They may not be right in front of their webcams, but they'll hear a "doorbell" when you enter their rooms.