NFC is the abbreviation of Near Field Communication, that is, short-range wireless communication technology, also known as near field communication, which was jointly developed by Philips and Sony. NFC is a non-contact identification and interconnection technology, which can be used for near-field communication between mobile devices, consumer electronic products, PCs and intelligent control tools.
What is NFC?
NFC (Near Field Communication) is the abbreviation of Near Field Communication, that is, short-range wireless communication technology, which was jointly developed by Philips and Sony. NFC is a non-contact identification and interconnection technology, which can be used for near-field communication between mobile devices, consumer electronic products, PCs and intelligent control tools.
What is the function of NFC?
Devices using NFC technology (such as mobile phones) can exchange data when they are close to each other. It is developed from the integration of contactless radio frequency identification (RFID) and internet technology. By integrating the functions of sensor card reader, sensor card and point-to-point communication on a single chip, mobile terminals can be used to realize applications such as mobile payment, electronic ticketing, access control, mobile identity recognition and anti-counterfeiting.
NFC technology principle
The technical principle of near field communication is very simple, and data can be exchanged in active and passive ways. In passive mode, the device that starts near-field communication, also called the initiating device (master device), provides a radio frequency field (RF field) during the whole communication process. It can choose the transmission speed of 106 kbps, 2 12 kbps or 424 kbps to send data to another device.
Another kind of equipment is called target equipment (slave equipment), which does not need to generate RF field, but uses load modulation technology to transmit data back to the initiating equipment at the same speed. In active mode, both the initiating device and the target device must generate their own RF fields to communicate.
What's the difference between NFC and Bluetooth and infrared technology?
Let's briefly explain it with the picture below. First of all, from the transmission network type, NFC is point-to-point like infrared, and Bluetooth is point-to-multipoint like Bluetooth. In terms of transmission distance, NFC is required to be within 10cm, and the transmission rate is lower than Bluetooth and infrared, but the transmission setting time is very short, only 0. 1s, and the transmission setting process is also very simple. Devices with NFC function can establish connection when they are close to each other and contact each other, and support active and passive transmission modes.
NFC technology is still very promising. At present, more and more electronic products and devices support NFC, and the development of science and technology is bound to make life more and more convenient.