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Building a Home Security System with Arduino by Jorge R. Castro

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Near Field Communication

Near Field Communication (NFC) technology is based on the RFID technology. Basically, the principle consists of two devices fused onto one board, one acting as an antenna to transmit signals and the other that acts as a reader/reciever. It exchanges information using electromagnetic fields. They deal with small pieces of information. It is enough for us to make this extraordinary property almost magical.

Today, we find this technology in identification and access cards (a pioneering example is the Document ID used in countries like Spain), tickets ...

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