March 2012
Beginner
44 pages
41m
English
Content preview from Getting Started with RFIDBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 4. RFID Meets Home Automation
Between my officemate and me, we have dozens of devices drawing power in our office: two laptops, two monitors, four or five lamps, a few hard drives, a soldering iron, Ethernet hubs, speakers, and so forth. Even when we’re not here, the room is drawing a lot of power. What devices are turned on at any given time depends largely on which of us is here, and what we’re doing. 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. Each of us has a keyring with an RFID-tag key fob. The reader by the door reads the presence ...
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