1. Introduction
NFC is short for Near Field Communication. It is a high-frequency wireless Communication technology over a short distance that allows non-contact point-to-point data transmission (within 10 cm) between electronic devices to exchange data. It has the characteristics of low cost, easy to use, and more intuitive. NFC provides a simple, touch-sensitive solution that allows consumers to exchange information and access content and services easily and intuitively.
2. classification
NFC technology evolved from contactless RADIO frequency identification and is backward compatible with RFID. It was first developed by Sony and Philips respectively and is mainly used to provide M2M communication in mobile phones and other handheld devices. Its modes are mainly divided into the following:
Card mode: this mode is equivalent to an IC card using RFID technology. One advantage of this approach is that the card is powered by the RF field of the contactless card reader.
Point-to-point mode: This mode is similar to infrared and can be used for data exchange, but the transmission distance is shorter, the transmission creation is faster, the transmission speed is faster, and the power consumption is low.
Card reader mode: used as a contactless card reader, such as reading information from posters or exhibition information electronic tags.
3. The principle of NFC
NFC devices can exchange data in active or passive mode. In passive mode, the device that initiates NFC communication provides an RF field during the entire communication process. It can choose one of the transmission speeds of 106kbps, 212kbps, or 424kbps to send data to another device. The other device, called the NFC target device, does not generate an RF field but uses load modulation technology, which transmits data back to the originator at the same speed.
In active mode, both the initiating device and the target device generate their own RF fields for communication. This is the standard mode for peer-to-peer communication and allows for a very fast connection setup.
What is the function of NFC?
NFC, short for Near field communication, is evolved from the integration of non-contact radio frequency identification (RFID) and interconnect technology, providing a very safe and fast communication mode for various electronic products.
At present, NFC uses mobile terminals to achieve mobile payment, electronic tickets, access control, mobile identity identification, anti-counterfeiting and other aspects.
NFC smart cards can also be entertainment self-service kiosks or other entertainment facilities such as membership cards, as long as a non-contact smart card is embedded in an M1 chip that uses cashless technology, the backside of the card can also be a high magnetic strip card, printing barcode, QR code, etc., can realize membership, payment, scanning or QR code and so on.
Which phones support NFC?
At present, most mobile phones with NFC functions are sold on the market, but the available NFC functions are not the same, not all devices support all the functions of the second part. At present, Huawei, Xiaomi, and most parts of Android smartphones, iPhones, and so on all support NFC.
How does an NFC phone read/write a smart card
Read the CARD ID. Install “NFC TagInfo”, open the NFC Settings of the mobile phone, attach the access card to the NFC part of the back cover of the mobile phone, and read the campus card ID with “NFC TagInfo”. You can see that:
For example: my card ID is 13:67:A9:0A.
More info pls visit video below:
