NFC technology radius action. Why NFC does not work on Sony

Initially, Near Field Communication technology ( NFC.) I received the maximum distribution as technology to make contactless payments. You can use a smart card with a built-in NFC chip as a ticket in public transport, as a payment card in retail facilities, like a "smart" business card or as a contactless key card.

However, recently, this technology is increasingly and more often used in devices such as smartphones and tablets: almost all major manufacturers have begun to equip their models of medium and high levels of NFC adapters.

What is NFC?

If you translate the name of the Near Field Communication technology from English, we will get the phrase "Communication of the Middle Field", which can be deciphered to a normal language as wireless communication at short distances. Thus, we see that two NFC-compatible devices can communicate with each other when they are nearby. And indeed, the "long-range" NFC is just a few centimeters.

IN mobile devices NFC technology can be used for various purposes. You can, for example, turn your phone into a virtual bank card, use it as a pass to the pool or an enterprise. You can also quickly share files and references, and even with special applications, read and record information in programmable NFC labels or NFC smart cards.

IN operating system Android, support for NFC appeared in android version 4.0 Ice Cream Sandwich - Its built-in Beam function allows you to exchange files between devices.

Why do NFC need if there is a Bluetooth?

As you remember, NFC is most often used when paying for various goods or services, and in this case, Bluetooth is not quite suitable. First, due to its large radius of action (there is a possibility of intercepting your payment data). And secondly, the connection between the two NFC devices, unlike Bluetooth, is almost instantaneous.

Is there NFC support on your device?

Not all phones and tablets have NFC adapters. Does your tablet support NFC? How to check it out?

Some manufacturers, such as Samsung, place the inscription NEAR Field Communication directly on the battery of their smartphones, others such as Sony, place the NFC logo on the device.

However, the easiest way is to check the presence of an adapter NFC in the phone or tablet, it is possible through its settings menu:

Go to the settings menu of your Android device

In the "Wireless Networks" section, click "More ..."

Here you should see NFC settings:

Activation NFC.

If your tablet or phone has a NFC adapter, you need to enable its use to exchange data between other NFC devices.

Go to Settings -\u003e Wireless Networks -\u003e More ...

Mark the "checkmark" item "Allow data exchange when combining a tablet with another device"

It will automatically turn on android function Beam.

If Android Beam does not turn on automatically, simply click on it and select "Yes" to turn it on.

When Android Beam is disabled, it limits the capabilities of the NFC data exchange between smartphones or tablets.

Data exchange using NFC

After you activated NFC, you can use it for data transmission. For successful data exchange, notes between tablets and phones, please note the following:

On both - and transmitting, and the receiving devices must be enabled NFC and the Android Beam function.

None of the devices should be in sleep mode or have a blocked screen.

When you bring two devices close enough to each other, he will hear sound signalreporting that devices discovered each other.

Do not divide the devices until the data transmission is over, and you will not hear a signal about the successful end of the process.

Data transmission via NFC

Place the rear panels of devices against each other.

Wait until confirmation of the fact that both devices have found each other and will not appear on the sender screen. "Click to transfer data":

Click on the screen and data transmission will begin:

You will hear sound confirmation, both at the beginning and on the end of data transfer.

Exchange applications

With NFC you can not share Apk files. Instead, the sender device transmits to another device link to this application in Google Play. Market, and the recipient opens the page in the market with a proposal for its installation.

Web piping

Just as in the previous case, the web page is not transmitted from one device to another, and only the link exchange to it, which the tablet or the recipient phone opens in its web browser.

Exchange video YouTube.

Again, when the YouTube video is exchanged, the transfer of the file itself is not performed - just the second device will open the same video on YouTube.

Using NFC tags.

In addition to sharing information between tablets and telephones, you can use your device for reading (and writing) data from NFC labels and smart cards equipped with NFC chip.

NFC chips are small enough, and they can be embedded anywhere - in business cards, bracelets, labels of goods, stickers, price tags and other items. They may contain data about a person, a URL address, product information and even the commands that your phone or tablet will have to touch these labels.

To read data from NFC tags (or to record information in them), you, of course, will need a special application.

For example, using the Yandex program program you can find out how many travels remained on a one-time card of the Moscow Metro, and the NFC App Launcher program will provide you program your phone or tablet to perform certain actions by placing the appropriate information in the NFC label.

Conclusion

Most of the modern Android phones and tablets are already equipped with NFC adapters, but so far this feature is more in demand and its application is still limited, mainly the ability to quickly exchange content and contactless payment services. Nevertheless, in the future, NFC can penetrate all areas of our life, sometimes even completely unexpected.

Hello expensive readers of this blog. In this material I will talk about interesting technology NFC. Many have already heard of this novelty, but announced in 2004. The possibility is most often used in Android or iOS smartphones, but there are many other devices where technology is used, we will also talk about this.

NFC. (Near Field Communication) - translated as "near contactless communication". There are several definitions. Used to provide communication between devices in a short distance, was originally intended to make contactless operations. The actual distance for interaction is 10 cm.

The definition was told, now let's move directly to the analysis of all nuances, history and field of use.

Content:

Principle of operation NFC.

It would seem that the function is very different from other wireless models, and also inferior to them. The principle of NFC is that the device where the module of this technology works at a speed of about 400 kbps (explicitly inferior to Wi-Fi), the interaction occurs at a distance of 10 cm, that is, you practically apply the device to each other, although time Connections are usually instantaneous.

The NFC module is very compact, so it can be embedded not only in smartphones, but also in hours. He does not consume a lot of energy. For the module to work in the desired direction, the device must be an antenna. On the phones, she usually is on the back side. Thus, contact with devices should provide instant contact. If a device with large dimensions, such as a tablet, then the interaction point is already more complicated.

As for security, the creators did not think about it at all. Protection should be carried out at the level of the device where the NFC module is used. In other words, if you use the payment system, then you can not worry about the safety of making payments. If you lose your phone, or your theft will be to blame for you, if you have not been installed as an unlock at least the minimum level of protection, for example, graphic key, Fingerprint scanner or pin-code.

Of course, the difference between NFC technology from other wireless solutions is that the technology is essentially a scenario, unlike the same Bluetooth, which clearly states that it must receive and receive data, or be able to connect with headphones and other devices. In NFC, various methods can be created independently to be implemented using software. In short, give the will of fantasy and you can create a lot of interesting things.

By the way, I did not say that the NFC function is based on RFID identification. These are usually the so-called tags that allow you to determine the automatically device using a radio signal. This feature allows you to bind both with active devices (working on batteries) and with passive (which do not need food).

What is the feature of technology and where applies

By affecting smartphones, there are several applications from this type of device here:

• Use in quality payment system (binding credit cards, gift and discount cards);
• Data transmission between two devices (remind, the distance between devices is at least 10 cm);
• Use as user identification;
• Bluetooth technology connection for data transmission;
• Reading RFID marks to obtain any information, for example, with bulletin boards.

As already mentioned, NFC is most often used in smartphones and tablets on or iOS. The thing is that we almost never break up with your phone, so the embedding of wireless technology has been aimed primarily on mobile devices.

In the future, NFC technology will be applied not only in mobile, but also in electronic keys, with unique identifiermay not be faked when buying tickets, and indeed any tickets and many other options.

Door locks and handles

By the way, no longer need to worry about the loss of the key to open the door, because there is a handle in which the wireless technology is built high-frequency connection. With any device (for example, the phone) you can enter the appropriate label that will open the door when submitting. Such a thing can be searched in Chinese online stores like Aliexpress.

Amazing but there are so-called smart castles. They have not only a hole for the key, but also built-in NFC module. He can send a notice to the phone when you open the door (or someone tried to do it), as well as if someone pounded. The lock can be associated over the network and remotely manage them. You can ponate electronic keys with embedded marks and distribute all family members or even friends.

Nfc ring what it is and how to use

As already mentioned, if any item with the NFC module has, you can record almost any information. For example, you have a special ring. Using it, you can transmit contact details and do not need to carry all sorts cards with you. And you can also use to open the same locks.

If there is no electricity in the house (and the lock feeds exactly from it, or from batteries), then the door can be opened with the key. In this case, it is necessary to reinforce and always carry the key when you leave.

Contactless payment

I already wrote about this type of use of the above technology. Now almost in all cities of Russia, at least in one store, but there is an ATM or a reader that allows you to implement. The card is enough to connect with the application, such as Android Pay or Samsung Pay.

Fare

To pay for the passage of the subway or go through the turnstile, all the same NFC will help you. To pay you will need a special SIM card with support for this technology. Most likely, now most of the operators are supported, but you better specify.

Finally, you can use NFC in jewelry, some manage to embed them in tattoos, for example, to unlock the smartphone.

News on NFC Forum

Together with the development was based on a forum where the developers are trying to promote technology in various household solutions, well, and smartphones, of course.

On the resource you can find the necessary information about NFC and news, rather associated with the compliance of standards in some devices.

What about security in devices with NFC

Already repeatedly mentioned the use of various methods of unauthorized access to data via NFC. For example, in 2012, an exploit was created, allowing to introduce into a smartphone malicious code and get full access To all that it is located in it, including the management of the device.

If an attacker has the necessary antennas, then there is probability via NFC to listen to a person, of course, with some skills you can achieve a listener at a distance of several meters maximum. It is important that the device that feed on the energy is easier to listen to the passive option.

By experiments, a breakdown of devices of devices was identified, by sowing a signal. Radio signal, as is well known, it is very easy to distort, and the RFID module is very sensitive to this.

Why is Bluetooth cannot be used to make operation?

Bluetooth from NFC is distinguished by the fact that he has a large radius of action, which is why the signal is easy to intercept, as well as a small access time. NFC is associated with the device almost instantly.

NFC - in which phones there are and how to enable

I'll show you on the example Android phone. When you purchase, you probably read the characteristics of the smartphone, and probably there was a line "Support NFC". If you do not remember, it can be viewed in the system settings.

First, make it down on the screen, to open the notification curtain. It is possible that there you will see the option "NFC".

If there is no function notification in the curtain, then go to the settings. I have Android 7.1.2 with LineageOS shell, so I'll show you on its example. In chapter "Wireless networks" Click on the button "Yet".

We hit the section where the NFC subsection is displayed, where it can be turned on. There is also a Android Beam feature that allows you to exchange data between devices and contactless payment where you can choose the main means of payment.

How to use tags with android device

First you need to find NFC labels. They can be used to start any Android application. For example, you are driving, and you are not comfortable to look for every time need app And distracted by the road. It comes to the aid of the label, attracting the application to the smartphone instantly start.

To record the necessary data in the label you need to download the application NFC Retag.. With the help of it, you scan the label, and then select the application you want to run when to bring it to the smartphone.

How to transmit files by NFC

Now touch the phone where you want to send the file and wait. In fact, this data transfer option is greatly inferior to Bluetooth or Wi-Fi, but if you need to convey some super-secret data, then a small range of action and the minimum probability of interception will provide you.

In addition to the standard file transfer with using Android Beam can be transferred:

• Open link in the browser;
• Data from Google Maps (defined route or place);
• Contacts - sent without a photo;
• Applications from Google - Link sent;
• Any file types - from text to media.

Creating tags

To create labels you need a blank, the form factor may be for every taste. Ordinary round marks can be purchased as in Russia, so on the Internet, for example, on Aliexpress for 80 rubles.

Now you can install the application on the smartphone (we need to somehow write the info to the label?). I can offer Taginfo or Tagwriter.

The second utility can record the necessary data on the label, it will be needed today. The first read information. You can write anything anything, but since the label has a very small volume (usually in bytes), then some data, the contact type of contacts will not always be written. More precisely, the contact itself will be recorded, but the photo attached to it is not. In future articles, I will show you how to create a NFC label using the specified application.

That's all, now you know what NFC is, in which phones it is and why is it used at all. IN everyday life It can help well. If there are any questions, be sure to unsubscribe in the comments.

Read 6 min. Views 61. Published 08/19/2018

Modern smartphones are very functional and contain many different technologies that are definitely useful and necessary, but not always understandable. simple user. The same applies to Near Field Communication or "near contactless communication". In the characteristics of the smartphone, the technology is denoted by the abbreviationNfc that is in the phone They know a few, so often when buying a new smartphone doubts whether such a function is really necessary. Let's talk about it in more detail and discern what it is for the opportunity and how it is useful to the owner.

Nfc that is in the phone

So, NFC is a high-frequency module wireless communication with a limited radius of action. In order to eliminate the interception of data, the radius does not exceed 10 centimeters, but more and more often. To transfer information from one device to another, you must lower their sensors as close as possible.

The technology operates at high speed (the connection time between two sensors is not more than 0.1 seconds). In general, the work is built on radio frequency identification, data from transponders through radio signals is transmitted from one gadget to another.

Today, such a module is found mainly in gadgets on the Android platform, it is introduced not only in expensive devices, but also in the model of the average price category. However, often modules are found on other models of devices, but they are often limited to one function. Data on transponders can be different, due to which the phone can perform in a variety of roles. It is very convenient, first of all, due to the fact that the gadget has long been an integral part of a person's life and accompanies him everywhere.

How can I use the phone with the NFC module

Technology is still gaining popularity and are not widespread everywhere. So few today knowNfc that is in the phone. Nevertheless, even in small, removed from the central regions, settlements There are examples of the application of the module.

As mentioned above, the transponder may contain different information and assign different roles to a smartphone. Here are some of the most familiar and distributed use options.

Thus, it can act as a payment instrument, user identification tools, a key for electronic locks, a bonus card, a travel ticket for any type of transport. The technology is actively used in those areas where you need a great security and confidential data transfer. And also often you can meet examples of the application of the module in the field of services and entertainment.

Principle of operation NFC.

So, Nfc that is in the phone We figured out. Let's try to find out the principle of operation of this development. Some users know that the technology can manifest themselves on passive devices, that is, it does not necessarily require a connection to an active power source.

This is due to the fact that the basis of the work of the technology is the electromagnetic induction. That is, the reader transmitter at a frequency of 13.56 MHz on a permanent basis radiates the signal sinusoid. The sensor is also equipped with an antenna and when the distance between the two elements becomes sufficient for the operation of the technology, the magnetic field is created alternating current In the coil of the reading item. After that, the current occurs in the second coil, the meager charge is enough to work NFC, so that it does not require an additional power source.

Modern smartphones NFC antenna contain under the rear lid. And its location, as mentioned earlier, was marked by a special icon. This location is very convenient, as the antenna, located more deeply, can make it difficult to make the data exchange process.

What is the advantage of NFC in front of other wireless communication modules

The active users of smartphones know that the gadget is equipped with several wireless data transmission technologies at once, so why are you still needed if there are already others. This is, of course, familiar and familiar Bluetooth and.

However, NFC has a lot of advantages over its fellows, which mainly ensure the security of data transfer and the absence of the ability to intercept information.

• First of all it is the shortest connection time. For one tenth of a second, a complete exchange of data occurs.
• A limited range of action makes the data transfer method more protected. Technology, according to developers, acts within a radius of 10 centimeters, in practice it is significantly reduced.

Data transfer rate is significantly less than Bluetooth, however, it does not spoil overall impression from development. In general, NFC is very reliable and the necessary technology of transfer, it is in those directions where it has found application.

To find out if a smartphone supports this technology You can search for the appropriate inscription (NEAR Field Communication) on the Gadget Battery or the branded logo on the rear panel of the device. The module is necessarily present in the smartphone settings, it can be activated or, on the contrary, turn off. In addition, you can refine information in the accompanying documents to the phone. To use technology will need to download additional applicationsso, for example, for the use of a smartphone as a payment agent, you will need Google Pay or Apple Pay..

NFC (NEAR Field Communication) - one of the types of wireless communication, acting at a very close distance - all new and modern smartphonesAs a rule, there is on board while leaving the factory. However, from old devices or low-budget devices, the presence of an appropriate chip can not be expected. What advantages still brings a NFC chip?

• First of all, NFC makes sense to use for everyday affairs, as a daily user must repeatedly change certain settings, for example, adjust the sound, activate Bluetooth or WLAN, turn on and off GPS.
• NFC automates changes to settings, since you can save the appropriate information in the so-called NFC-tags. Then you just read the smartphone the desired TEG and the saved settings come into your action.
• NFC is excellent and for automatic launch applications, also in combination with an NFC-tag, where you can save the command, for example, to disconnect the Bluetooth and WLAN in the evening, while opening the alarm application.
• NFC can also be used as business card or greeting card. In the first case, you can save all the necessary personal information on your NFC card to which you can attach links to a website or channels. social networks. Then another user can simply hold his smartphone over the NFC card and directly get all your contact details.
• A personal digital greeting card makes sense to send primarily in combination with a real postcard. So, for example, you can not only congratulate a friend happy birthday in the letter, but also put in the NFC-Tag envelope, with which the recipient can watch the video on YouTube or a couple of saved in cloud service pictures.
• For all fans of the NFC order, also offers one extremely interesting option: for example, when moving, you can stick the tags on the boxes so that then only with the touch of the smartphone to view its contents. Also tags are great for maintaining orders in the basement or in the attic.
• Well, in the end, NFC makes possible wireless payment through a smartphone, even if payment systems such as Android Pay or Apple Pay are not available.

Install NFC - the possibility of the first

In general, you have three different features to equip the NFC functionality your smartphone. Of course, none of them can completely replace the integrated NFC-chip manufacturer, since such modernization is possible only with limitations.

• Perhaps the simplest opportunity is to simply glue the NFC-tag to the back cover of the smartphone or, if it is not too thick, hide it under the cover.
• Then the phone will be able to perfectly manage and control the NFC tags in a completely normal way, since tags can "communicate" with each other. In addition, this method There is one advantage: in this form, the function does not spend the battery power.
• Of course, no other installations can be applied, as the system cannot connect to NFC-tag.
• For this reason, you will not be able to use such applications as "NFC Tools", because they need system access to NFC-chip.
• Of course, with the help of other equipped NFC-module devices, you can read information from the NFC-tag on your smartphone.

Install NFC - the rest of the second

The second option of the phone's retrofit function is NFC function for several years, but it is extremely effective.

• A SD card is used to which the NFC chip is built. Of course, your smartphone must have a micro-SD memory card slot so that this option can be considered at all.
• The advantage of this method: the system can access the chip and then it becomes possible to use the aforementioned applications.
• Supplier of this kind of micro-sd cards is a company called "MONETO".
• But also such a mobile payment system service provider, such as "DeviceFidelity", for example, offers similar solutions with which you can not only pay, but also use the rest functionality NFC.
• However, problems often arise with the availability of microSD cards, so that such an opportunity is perhaps it is difficult to implement.

Install NFC - the possibility of the third

Install NFC: NFC-Cover

Well, finally, the option of self-replacement remains back cover Your smartphone.

• Be careful: when performing this procedure, you can fully lose the warranty on your smartphone, especially if you damage anything inside the device.
• If you still decide to replace the rear cover, the main task is only to install the back cover with an integrated NFC chip.
• After that, the system will receive access to the chip, and therefore you will be available all the amount of NFC functionality.
• Is there such a back cover for your smartphone, you can check, for example, on Amazon.com.
• Removing the back cover for each device is carried out in different ways. Depending on the model and the manufacturer, you may even need an additional tool.
• Considering all this, you must start replacing the rear panel of your smartphone only if you definitely imagine what it will be necessary to do and take into account what difficulties may arise on this path.
• Consequently, given the last method is not the most comfortable, but for the experts of smartphones may be worthy of attention.

Deciphered as Near Field Communication, which can be translated as "Middle Communication" or as "near contactless communication". How can I understand from the name, this is a technology for wireless communication at short distances.

NFC technology can be used to solve a variety of tasks. For example, using NFC, you can pay for purchases, identification of personality, configuration wireless connections and much more.

In this material you will learn how to enable NFC on Android smartphoneAnd also what is Android Beam, how to enable it and use.

In order to enable NFC on the Android smartphone, you need to open the settings and go to the option with additional settings. wireless networks. This section is usually called "still" and is immediately after the sections "Wi-Fi", "Bluetooth", as well as "Data Transfer".

After opening the "More" section, you will appear for additional wireless network settings. If your android smartphone supports NFC technology, then there will be an appropriate switch that allows you to disconnect and turn on NFC.

How to enable Android Beam

Android Beam is a Google technology technology that allows you to transfer web pages, contacts, coordinates, routes, as well as photos and videos from one android device to another using NFC technology.

The data transfer process through Android Beam is very simple. All you need to do is unlock two smartphones and attach them to each other. rear panels. After that, the device will automatically detect each other and a proposal will appear on the screen.

In order to enable Android Beam technology, you must first turn on the NFC, as this is described above. After turning on the NFC, the "Android Beam" section will be available.

If you open the "Android Beam" section, then there will be a switch with which you can enable or disable this feature.