When using mobile phone to brush gates, POS machines, etc. , aim the area at the sensing center, keep the distance of 1-2 cm, and do not have to be completely close to the card reader. The biggest advantage of NFC payment is fast! Whether you are on the screen, watching videos, listening to music or in any interface, you can swipe your card directly by turning on NFC and sticking your phone at the card swiping place.
Compared with scanning code payment, NFC payment is closer to the traditional physical card, and even the elderly who are not familiar with mobile phones can use it very easily. If you want to use NFC to brush the bus and subway, you need mobile phone manufacturers to cooperate with bus and subway companies in various cities, otherwise it is useless even if the mobile phone supports NFC.
Nfc working principle
The communication distance of NFC is within 10 cm, the working frequency is 13.56MHz, and the transmission speed is 106Kbit/s, 2 12Kbit/s or 424kbit/s ... nfcip-1standards specify NFC in detail.
NFC working mode is divided into passive mode and active mode. In the passive mode, the NFC initiator device (also called the master device) needs a power supply device. The master device uses the energy of the power supply device to provide a radio frequency field and send data to the NFC target device. The transmission rate should be selected from 106kbps, 2 12kbps or 424kbps.