Everything You will read about NFC from scratch.
What is NFC?
NFC (Near Field Communication) is a short-range wireless communication technology that helps data transfer between compatible devices when they are held nearby within a few centimeters.
How does it work?
NFC operates on the principle of electromagnetic induction to establish a radio frequency (RF) connection, when they are brought together. This technology relies on two key components: an NFC chip and an antenna. When two NFC-enabled devices are brought within range, their respective antennas create a small electromagnetic field for exchange of data between the devices.
The NFC chip acts as a transceiver for transmitting and receiving data. It modulates and demodulates the radio signals for transfer of information between the devices. NFC operates at a specific frequency of 13.56 MHz, which is globally available and provides a standardized communication platform.
Technology of NFC Hardware
NFC hardware is based on Radio Frequency Identification (RFID) technology. It uses electromagnetic fields to enable wireless communication between devices. However, NFC is designed specifically for short-range applications and operates at a different frequency (13.56 MHz) than other RFID technologies.
ISO/IEC 18092: This standard defines the NFC Interface and Protocol (NFCIP-1) for data exchange and communication.
ISO/IEC 14443: This standard specifies the air interface for proximity-coupling devices. This is utilized by NFC for contactless smart card emulation.
FeliCa: This is a proprietary contactless smart card technology developed by Sony, which is also supported by some NFC implementations.
Main features of NFC.
Contactless Payments: One of the most widespread applications of NFC is in mobile payment systems. NFC-enabled smartphones can be used to make secure transactions at compatible payment terminals by simply tapping or holding the device near the reader. This feature has revolutionized. We make purchases delivering a convenient and secure alternative to traditional payment methods.
Data Exchange: NFC permits the transfer of various types of data between devices such as contacts, photos, videos, and files.NFC has three data transfer rates: 106 kbit/s, 212 kbit/s, and 424 kbit/s. It is used at a frequency of 13.56 MHz and can transmit data up to 424 kbit/s within a distance of about 10 centimeters.
Device Pairing: NFC simplifies the process of pairing devices such as Bluetooth headsets or speakers with smartphones or tablets. Instead of manually entering pairing codes or navigating through complex menus. NFC allows devices to establish a connection by simply tapping them together.
Access Control: NFC technology can be used for access control systems granting or denying entry to authorized individuals by tapping their NFC-enabled devices against a reader. This application is commonly found in secure buildings, hotels, and other access-controlled environments.
Smart Posters and Tags: NFC-enabled smart posters or tags can provide additional information or trigger specific actions on a smartphone or tablet when tapped. This feature is often used for marketing purposes to obtain digital content, coupons, or product information by tapping their devices against the NFC tag.
Device Configuration: NFC can be used to simplify the configuration process of devices by transferring settings and credentials from one device to another through a simple tap. This feature is particularly useful for setting up new devices or restoring configurations after a reset.
Identification and Authentication: NFC technology can be utilized for identification and authentication purposes such as employee badges, access cards, or secure login systems. The close-range nature of NFC communication provides an additional layer of security than traditional methods.