Disclaimer: I received this book for free through the O’Reilly Blogger program. is a very short “book” on RFID (Radio Frequency Identification), a way to tag and identify objects over varying ranges, and how to use Arduino to create a few interesting RFID projects.
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.If you try something similar with the computer (try leaving the semi-colon off in C or miss an indent in Python, for example), you’ll get a nasty error message.This book your computer to work with the looser languages used by humans (like English) instead of the stricter counterparts used by machines.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.