1. Touch gently to talk about the application of NFC technology in audio products.
NFC has been around for a while now, not a new technology, but so far the popularity of NFC seems to be not satisfactory, and even many people still do not know what NFC is. NFC English full name is Near Field Communication, Chinese name is near field communication, in fact, it is not difficult to understand literally, it is a technology for short-range communication, one of the original purposes of NFC is to enable mobile phones and some The mobile device can realize the function of the IC card, so that the card payment can be realized through the mobile phone. The NFC technology does not need to be paired and verified before use, and can be completed by tapping, which is very convenient, and the NFC technology is continuously promoted and developed. It also has other uses, such as fast pairing for Bluetooth speakers and headphones.
In addition to the card emulation mode that allows the device to function as an IC card, NFC also has a peer-to-peer mode and a read/write card mode. There are three modes. In the peer-to-peer mode, two NFC-enabled devices can exchange and transmit data at close range. The role and Bluetooth are somewhat similar, so many people will compare NFC and Bluetooth, and think that NFC is a competitor of Bluetooth. NFC's read/write card mode can read or write related data on the electronic tag. This is similar to the two-dimensional code, which is a function that Bluetooth cannot do.
From the perspective of NFC's payment and card reading functions, Xiaobian believes that it is closer to the two-dimensional code, and it can replace the two-dimensional code more than Bluetooth. We will not start from the principle of NFC technology, to see how NFC works, what advantages it has compared with other communication methods and how it can be brought to us by audio applications.
2. Convenient application of NFC technology to realize the principle and electronic label
NFC is a short-range wireless communication technology based on RFID (Radio Frequency Identification) technology, which enables two NFC-enabled devices to directly communicate in two directions at close range. Under normal circumstances, the communication distance of NFC is 10cm, and the transmission speed is up to 424kb/s, which is quite obvious compared with the maximum transmission range of Bluetooth of 2.1Mb/s and 100M. However, the biggest advantage of NFC is that it is convenient to use, for example, when it is necessary to pay. When a supported device is turned on for NFC, you can transfer the payment by simply touching the phone like an IC card, without complicated pairing, even if it is compared with the popular QR code. Code users still need to turn on the camera to operate, and NFC also has two-way communication capabilities, which is difficult to achieve with QR code.
Performance comparison between NFC and Bluetooth
Since NFC is a branch of RFID that uses radio magnetic fields to transmit, we can see from the NFC tag that does not need to be powered. The inside is the coil and chip needed for electromagnetic induction. When reading the card, the NFC device will pass the electricity. Magnetic induction allows the tag to be energized, allowing the chip on the tag to work and read information. Therefore, the cost of NFC card reading is relatively high compared to the two-dimensional code with almost no cost, and the NFC tag is also quite Trouble, this has also become a problem of slower NFC promotion. The NFC transmission capacity is only 424kb/s. Compared with Bluetooth and WiFi, this speed is not competitive at all. Therefore, many devices now use NFC to transmit authentication information, complete pairing quickly, and then establish WiFi or Bluetooth. connection. A large part of the audio product also uses this design to complete the Bluetooth pairing via NFC, which greatly simplifies the process.
3. Simplified process NFC technology can be applied to Bluetooth pairing
The application of NFC in Bluetooth audio products greatly simplifies the Bluetooth pairing process. Even small white users who are ignorant of digital devices can easily establish connections. This method is very convenient, but it has encountered certain problems in actual promotion. Difficulties, in fact, this still comes down to the fact that the popularity of NFC-enabled devices is too low. Although NFC-enabled mobile phones were born in 2006, the development has not yet become a standard, and the number of supported devices compared with Bluetooth and WiFi. Still very few, most of the devices supporting NFC are concentrated at the price of more than 2,000 yuan, and the promotion and promotion on the mobile phone is also insufficient. Many netizens simply do not know whether their mobile phone supports NFC, so this becomes A barrier to promoting NFC.
Many users who have experienced NFC pairing will definitely like this simple operation. Even if the device is paired for the first time, there is no need to perform troublesome search operations. Just touch the phone with a light touch when the Bluetooth device is turned off. Pairing, while the Bluetooth device will automatically turn on, even looks a bit magical. Users who may not pay attention to audio products often think that the products that support NFC Bluetooth pairing are still rare. In fact, there are still a lot of support devices. Many of the latest products released by the manufacturers are beginning to support NFC pairing, whether it is Bluetooth speakers or Bluetooth headsets are used, although it can't be said that this is standard, but at least it has become a trend.
4, touch link NFC technology on audio equipment applications
The application of NFC technology in Bluetooth audio products is mainly used for fast pairing. As long as the device information and authentication data are exchanged between the audio product and the mobile phone by light touch, the audio device is also turned off from the state of being shut down. Activation, thus achieving a simple pairing, in fact, this is a safe and easy pairing application of NFC combined with Bluetooth. In the whole process, NFC is not a connection method, which plays a guiding role, but the actual transmission is still Bluetooth.
Some users who use NFC pairing for the first time may find that their mobile phones cannot be paired anyway, and the mobile phone and audio equipment are not responding. This phenomenon is generally caused by the misalignment of the NFC sensing areas of the two devices. In the NFC fast pairing, it is necessary to roughly match the sensing area of ​​the mobile phone and the sensing area of ​​the audio device to complete the pairing, which is similar to the characteristics of the IC card, which is also a small disadvantage of the NFC quick connection. Of course, in order to prevent the user from finding the sensing area, the manufacturer usually marks the sensing area on the surface of the device, so that the user does not have to look for it.
5, pros and cons NFC technology still needs long-term development
The application of NFC brings a lot of convenience to our life. When in the card emulation mode, an NFC-enabled terminal can be used as an IC card. It can act as a transportation card or a credit card. The payment can be completed by tapping on the corresponding device, which is faster than the popular two-dimensional code payment, but the drawbacks are quite obvious. If you want to promote NFC payment, it is inevitable to follow up accordingly. For example, SIM card support is required, and these will be no small expenses. In addition, the number of NFC devices currently supported is limited, and there are not many users who understand NFC. Manufacturers are naturally not willing to spend too much energy on NFC. Promotion of payment.
NFC tag applications also have such problems. First, the cost of NFC tags is higher. Compared with the two-dimensional code that requires almost no cost and high versatility, NFC tags require a large amount of deployment, and The market share of NFC-enabled devices is not large, so the chances of seeing NFC-labeled ads on the street are naturally smaller.
Nowadays it is widely used or NFC fast pairing. At present, it is the most effective solution to solve the complicated Bluetooth pairing. It can provide users with convenient operation, and even if there is no NFC-enabled device on hand, it will not affect normal. The process of pairing. However, it is somewhat troublesome to apply to the pairing of two mobile phones. It is often necessary for the user to install the corresponding software on the mobile phone to enable the touch pairing of the two mobile phones.
As far as the current situation is concerned, NFC has advantages and disadvantages. Although it has brought convenience to people, it has increased a lot of costs, and although NFC still has many users who do not understand it, it has not become the standard communication of mobile phones. In terms of NFC transmission performance, there is also a need for improvement. For example, the transmission speed can be improved, so that NFC can also have the ability to transmit large files at close range. Xiaobian believes that NFC and QR codes are currently for a long time. Bluetooth and the peaceful coexistence have their own advantages. As far as the current situation is concerned, no one can replace them.
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