Near Field Communication [NFC] is a set of short-range wireless technologies, typically requiring a distance of 4cm or less to initiate a connection. It allows you to share small payloads of data between an NFC tag and an Android-powered device, or between two Android-powered devices.
Android-powered devices with NFC simultaneously support three main modes of operation:
1. Reader/writer mode, allowing the NFC device to read and/or write passive NFC tags and stickers.
2. P2P mode, allowing the NFC device to exchange data with other NFC peers; this operation mode is used by Android Beam.
3. Card emulation mode, allowing the NFC device itself to act as an NFC card. The emulated NFC card can then be accessed by an external NFC reader, such as an NFC point-of-sale terminal.
Some useful roles of NFC are depicted below :
NFC Roles
However , its range is not so far (~4cm) & even the data exchange in between the NFC enable devices is few number of bits . But these few bits role is much more big than itz exchange size as very well explained int he image given above. I’ve found a video on youtube , beautifully explained important 5 NFC uses in a very simple manner , shared below :
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