Near Field Communication

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NFC no need to launch an application .....................it just works!

What is NFC ? How it works ?

NFC stands for Near Field Communication, is a set of short-range high frequency wireless technology that establish radio communication with each other when bringing them into proximity, typically requiring a distance of 4 to 8 cm or less. NFC allows to share small amount of data between  NFC enabled devices and NFC tag or two android-powered NFC devices.

You would also like to know about - Sensor , AMOLED display , Biometrics, Smart card

NFC standards cover communication protocols and data exchange formats, and are based on existing radio-frequency identification (RFID). Unlike Bluetooth, no pairing code is needed, and because it's very low power, no battery in the device can be read. An NFC tag (essentially "targets" that "want" to be touched by NFC device like cellphones) can share and link to information such as set profiles, web pages etc.


* NFC work at a maximum range of about 4 inches (10 centimeters) which uses low speed at 106 to 414 kbps and a low friction setup (no discovery and no pairing) which then allow communication automatically when they are close to one another. NFC is a means of sending data over radio waves. It is similar to bluethooth or wi-fi but unlike those protocols its like RFID. NFC used to induce electric current within passive components as well as just send data, it is faster then bluethooth in general.

NFC - Used in
  • Making Payments - A Touch and Confirm sort of application of NFC through which payment can be payed via mobile, user just has to confirm or accept the transaction.* Card emulation mode of operation in which an NFC device such as a smartphone can be used like a contactless credit card. *

Fig 1: Showing Card emulation mode of operation.
  • Opening electronic doors secured with contactless locks - A Touch and Go application of NFC, where the user only needs to bring the device near by the doors control panel which has inbuilt NFC enabled tag which is programed to open the door.

Fig 2: Showing Opening door using NFC.
  • Logging on to computers - Its also a Touch and Go application of NFC, which enables the user to login its pc. * A read / write mode of operation in which one active device picks up into from a passive one *

Fig 3: Showing read/write mode of operation.
  • Touch and Connect -  Linking two NFC enabled devices to enable peer to peer transfer of data such as synchronizing, image and massage transfer and data download. * The peer to peer mode of operation that lets two smartphones swap data. * 

Fig 4: Showing peer to peer mode of operation.

Advantages of NFC - 
  • NFC enabled mobile devices allow users to store and access all sort of personal data - anywhere.
  • It works simply by bringing two NFC-enabled devices close together and they automatically starts communication without launching any app.
  • NFC devices can easily exchange and store data - message, pictures, music files and commands.
  • Key feature - It requires zero configuration.
  • Tap to Pay is the newest feature launched in android NFC-enabled mobile-phones, through which transactions can be done easily using Google wallet without taking out any plastic card to swipe.
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