NFC: Near-field wireless communication technology (near-field communication), is also a close-range secret communication method, using NDEF (NFC Data Exchange Format) for data transmission. The main purpose is to use for small payment, such as bus card and so on. If you need a mobile phone with NFC, the phone must have a built-in NFC chip. It is evolved from RFID technology.
RFID: Non-contact RFID, mainly used for tag identification. For example, there is a box of things, there is a tag on the outside, and RFID is used. After reading it, it can read the related object information in the box, which is much faster than writing it manually. For example, in some asset registrations, reading the tags, you can read the relevant information into your PDA. Features: mutual authentication, dynamic encryption and one-time key (OPT), high security
PDA: It is popular to say that a mobile phone with its own operating system is more powerful than a mobile phone, or it can be understood as a mobile phone.
NFC technology originated from RFID, but there are certain differences compared with RFID, including the following:
NFC operates at 13.56 MHz, while RFID operates at low frequencies, high frequencies (13.56 MHz) and ultra high frequencies.
The working distance of NFC is theoretically 0~20cm, but in the realization of the product, due to the special power suppression technology, the working distance is only 0~10cm, which ensures the safety of the business. Since RFID has different frequencies, its working distance ranges from a few centimeters to tens of meters.
3. Working mode
NFC supports both read and write modes and card mode. In RFID, the card reader and the contactless card are two separate entities and cannot be switched.
4. Peer-to-peer communication
NFC supports P2P mode, and RFID does not support P2P mode.
5. Application areas
More applications for RFID are in production, logistics, tracking and asset management, while NFC works in areas such as access control, bus cards, and mobile payment.
6. Standard agreement
The underlying communication protocol of NFC is compatible with the underlying communication standard of high frequency RFID, that is, it is compatible with ISO14443/ISO15693 standard. NFC technology also defines relatively complete upper layer protocols such as LLCP, NDEF and RTD.
In summary, although NFC and RFID technologies are different, NFC technology, especially the underlying communication technology, is fully compatible with high-frequency RFID technology. Therefore, in the field of application of high frequency RFID, NFC technology can also be used.
The more widely used RFID is now using the 14443 protocol, which is the 13.56mHZ standard.