Near field communication (NFC) - new technology wireless high frequency communication small range. Nfc chip< дает возможность обмениваться данными между different devices, located at a distance of 10 centimeters. This technology is a simple extension of an existing standard contactless cards(ISO 14443 classification), combines the operating interface of smart cards and the reader into a common device. Such an NFC device is able to communicate even with existing smart cards, as well as with ISO 14443 standard readers, and other NFC devices and can be compatible with the working contactless card infrastructure already used in public transport / payment systems. NFC is aimed primarily at use in mobile devices Oh.

What is an NFC module

A module is an external device that allows you to provide quick identification using a radio communication channel at a distance. The short-range communication module operates at a frequency of 13.56 MHz with speeds up to 424 kbit/s. This technology is based on the use of specialized chips (including in telephone SIM cards) in communication devices. Widespread distribution NFC technology in the near future is associated with the possibility of use in conjunction with smartphones and mobile phones: the mobile device is equipped with a module (an external NFC module for the phone is suitable), which will allow the subscriber to make timely payments for services and goods by simply bringing his phone closer to the reader. It is usually assumed that cash are debited from the client’s bank account, and not from the account with the mobile operator. communications.

Types of modules

The main types of NFC modules are SIM cards, external devices and chips. You can also use additional devices for communication and payment, such as NFC modules and stickers. The NFC module for the phone can be ordered separately, or it can be purchased already in the phone as built-in equipment. Stickers are attached to the phone body. There are passive and active. The first ones are not able to exchange data with the phone and do not allow you to write information to an NFC device through the communication channels of a mobile operator. Active - use the Wi-Fi/Bluetooth communication channel to communicate with the device, which leads to increased power consumption or the need to constantly recharge the module. A common drawback of such modules is the presence of fastenings.

How to add an NFC chip to a smartphone

The first option is an NFC SIM card. They are produced by many mobile operators. Install the ready-made functional card into your smartphone and pay for purchases with a light touch on the terminal. Of course, call it quality replacement for Apple Pay is not possible, since ongoing transactions are not encrypted and do not require fingerprint identification. In addition, the user will probably have to open a new account with the mobile operator/bank. However, if he is a holder of a plastic card from one of the banks, the problem will disappear by itself. All you have to do is visit the salon cellular communication, or a bank branch and get a SIM card.

NFC antenna. Another working method. For all users whose phone or smartphone does not have a “near-field” module in their arsenal, the path to “contactless” is a little more difficult. You will have to either replace the device, which is irrational, or equip it with an NFC antenna yourself. Contrary to popular belief, this is much easier to do than previously imagined. To do this, you need to purchase a special external NFC antenna. This can be done in cellular communication stores, then, by gluing it to the SIM card, install it under the cover of your mobile device.

A small note: commit this operation This will not work for owners of devices with a non-removable back cover and a side opening for SIM cards. The module can be installed in almost all phone models. This solution is simple and will be used until phones with built-in NFC modules appear on the market.

Why are more and more mobile manufacturers equipping smartphones with an NFC chip, and what are the possibilities? this technology opens to the user?

Currently available on the mobile market wide variety smartphones of high and medium price categories, which are equipped with an NFC chip. Before you pay for an additional function, you need to understand what it is and why it is needed in the phone.

What is NFC?

NFC (Near field communication) is an interface wireless communication, one of the main characteristics of which, as the name suggests, is a small radius of action (up to 10 cm). Among the features of the technology we can also highlight:

• Possibility of exchange with other devices and passive tags.
• Compact sizes.
• Low power consumption.
• Low data transfer speed.
• Connection setup time is 0.1 seconds.
• Budget cost.

Thanks to its small size and low power consumption, NFC can be used in small devices. In smartphones, the antenna is usually mounted on the battery compartment cover or the inside of the back panel if the battery is removable. So that users do not have the question of how exactly to apply the gadget to transfer data (this problem is especially typical for tablets due to their large size and short range of technology), the location of the chip is often marked with a special sticker on the case.

Since the NFC interface is only a base that does not provide a clear solution for use, mobile manufacturers and application developers have to independently develop work scenarios. This can cause problems when apps and devices from different manufacturers interact with each other.

Ways to use NFC

Perhaps one of the most common ways to use NFC is. The user can attach a bank card to his mobile device, with which he will pay in the future, for example, if the card is left at home. In this case, the possibility of data interception is extremely low due to the small range of the interface; a lost or stolen unlocked smartphone poses a great danger.

To make a payment via NFC you will need:

1. Bank card marked paypass.
2. Application of the relevant bank.
3. Find the NFC item in the application menu.
4. Attach the card to back cover phone for reading.
5. Remember the password for payment transactions sent in an SMS message.

The next method of using technology is data exchange. By using Android programs Beam can be transmitted various files from one mobile device to another. However, the transmission speed is very low, so this function is more suitable for sending small text messages and links.

Instructions:

1. Activate NFC - check the box next to this item in the “ Wireless networks", unlock the smartphone and turn on the screen.

2. Select an agent:

• Google Chrome - to transfer the current active link.
• Google Maps - for transferring the route.
• Google Play - for transferring applications, books and other content presented in the service.
• YouTube - to send a link to a video.
• Contacts - to transfer a contact.
• Gallery - for transferring photos and pictures (however, this can take a long time due to the low transfer speed, so in this case it is better to use special applications, which will be discussed below).

3. Bring the devices closer until the alarm sounds.

4. Touch and hold the screen to confirm the transfer.

5. Another beep will sound indicating successful file transfer.

There are various applications that use the NFC interface only for pairing, and subsequent file transfer is carried out via a Bluetooth or Wi-Fi connection: Send! File Transfer, File Expert HD and Super Beam WiFi Direct Share.

The next method is reading and writing tags. This function It works similarly, only it uses an NFC chip rather than a smartphone camera. It can be useful for automating home and work life. To create your own, you will need clean blanks and special programs for recording necessary information. You can assign the following actions to a tag, which will be performed after it is read: sending an SMS message or email, calling a contact, opening a link, connecting via Bluetooth, launching an application and much more.

Several programs for creating tags:

1. WiFiTap WiFi NFC - for connecting a wireless network. Helps guests connect to a Wi-Fi hotspot quickly and without entering a password.
2. ABA NFC - for creating various standard format tags.
3. SmartTag Maker - special application for users of Sony products, which contain a number of blanks used not only with the NFC interface, but also with the headset, Bluetooth devices, power supply, etc.

Bottom line

Each user decides for himself whether he needs the additional NFC function in his smartphone or not. However, this technology is being used in an increasing number of mobile devices. Therefore, if you did purchase a gadget with NFC support, you now know how to use all its capabilities to make life more convenient.

Today, technology allows people to pay not only with cash and a bank card, but also with a smartphone.

Contactless payments and mobile payment systems are the future; they are becoming popular every day. Google for your operating system created Android Pay (now), Samsung and Apple - systems of the same name with the Pay prefix. They work on the same principle - just bring the switched on, unlocked smartphone to the contactless terminal.

Today we will tell you in detail how to use NFC, how to set up this function, and what you need for this.

Smartphone with NFC

First and most importantly, the device must be equipped. He is the one responsible for contactless transactions. If the gadget does not have NFC, unfortunately, . The operating system version must be Android 4.4 and higher.

How to find out if NFC is available:

• Ours.
• Official websites of manufacturers with a list of technical specifications.
• Settings - More/Advanced/Additional functions (depending on Android versions and branded shell). This section should contain NFC and Android Beam features that need to be activated.

Supported card

This is the second most important condition. If the card does not support contactless payments or the bank for some reason gives an error when setting up the card, you will not be able to link it to a smartphone and Android Pay, an error will appear. In this case, you can either contact the bank with a request to reissue the card, or order a new one.

Almost all modern cards, including Sberbank (except Maestro), Alfa, Tinkov and others, support contactless payments. If you see such symbols, then in most cases everything is fine.

Depending on the brand of smartphone, download the application. As is clear, all devices except Samsung and Apple require a program (now called Google Pay). It is with her example that we will show how contactless payment via NFC works.

After installing the application, you need to create a bank card in it: you can scan it through the gadget’s camera or enter the number manually. You also need to manually fill in the expiration date, owner’s name and CSV code (three digits on the back). Then the entered data must be confirmed - an SMS message with a code will be sent to the phone number to which the card is linked.

When this operation is completed, the bank card will appear in the Android Pay interface. At this stage, the application will definitely require you to set up a screen lock - these are Google's policies. You need to set a PIN code, pattern or password. In the future, it will be possible if you have a fingerprint scanner, the main thing is that the device is unlocked.

Having started their work in Russia just a month ago, they have already managed to change our lives for the better. Thanks to them, we stopped digging through our wallets, holding up the queue, and flashing banknotes in front of everyone. So, in any case, say those who have already experienced all the benefits of contactless payment for themselves. But what about those who do not have this privilege?

Despite the relatively widespread mobile services to conduct transactions, many Russians (and not only them) do not have the opportunity to use them. The reason for this is quite simple and literally lies on the surface - the smartphone market is not limited only to Apple devices and Samsung. Some people prefer to use something, albeit less flashy, but certainly more accessible.

There are many ways to turn your smartphone, regardless of the manufacturer, into a real wallet. Let's start in order.

The first and, in my opinion, the most preferable is Yandex.Money.

Few people know that the Yandex.Money application for Android supports contactless payments, requiring only the NFC module integrated into the smartphone from the client. The user himself must take care of replenishing the wallet with title units (read – money).

The second method is NFC SIM card.

He produces these mobile operator MTS in cooperation with the bank of the same name. Install a functional card in your smartphone and pay for purchases with a light touch on the terminal. No one will guess that you cheated!

Of course, call it a full replacement Apple Pay still not possible, since transactions are not encrypted and do not require fingerprint identification. In addition, you will still have to open a separate account with MTS PJSC or Russian Standard Bank.

However, if you are already a card holder of one of the two banks, the problem disappears by itself. All you have to do is visit the nearest mobile phone store or bank branch, where you can get the SIM card described above completely free of charge.

The third method is an NFC antenna.

The antenna looks less intimidating in real life

For all those whose smartphone does not have a “near-field” module in its arsenal, the path to “contactless” will be somewhat more difficult. They will have to either replace the device with a new one, which is irrational, or equip it with an NFC antenna themselves. Contrary to popular belief, doing this is much easier than imagining it.

To do this, you need to purchase an external NFC antenna, which is sold in cellular stores, and, gluing it to the surface of the SIM card, place it under the cover of your smartphone. A small note: owners of devices with non-removable memory will not be able to perform this operation. rear panel and a side slot for SIM cards.

NFC bracelets.

Some banks, including Alfa Bank, are producing bracelets that seem simple at first glance, containing an NFC chip in their design associated with your personal account. It works on exactly the same principle as plastic cards with PayPass or PayWave technology.

Check with bank representatives about the availability of appropriate accessories in their range and, having received a copy, remove the chip from the purchased bracelet and simply put it in the case of your smartphone or tablet. This way, you not only don’t have to remember to have a wallet with you, but also worry about the autonomy of your main gadget.

The cost of an NFC bracelet, depending on the bank, ranges from 500 to 1000 rubles. A case with a small pocket on the back will cost you the same amount.

September 9 Apple company announced iPhone smartphones 6 and iPhone 6 Plus, one of the features of which was the NFC chip and the Apple Pay technology based on it. In the presentation, the main emphasis was placed on the possibility of contactless payment for purchases using a smartphone, but in fact, the capabilities of NFC do not end there and have long been successfully used in Android smartphones to perform many different tasks, from paying for a trip on the subway to automating your smartphone.

Instead of introducing

NFC stands for Near Field Communication or “near contactless communication”, in Russian. At its core, it is a small chip that can be built into a smartphone for the purpose of transmitting data over very short distances at a very meager speed. NFC is very close to RFID technology, which has long been used to tag products in supermarkets, but is based on its more recent ISO/IEC 14443 (smart cards) standard and is designed for use in portable electronics(read: smartphones) and performing secure transactions (read: paying for purchases).

As with the ISO/IEC 14443 standard, NFC has a range of only 5–10 cm, but the difference is that the NFC chip is capable of acting as both a tag and a reader at the same time. In other words, a smartphone equipped with NFC can be either a smart card (a metro card, for example), which just needs to be brought to the reader to pay, or the reader itself, which can be used, for example, to transfer funds between smartphone cards and convert real cards with support for ISO/IEC 14443 standard in virtual.

But this is only “one of” and the most obvious application of NFC. Due to the fact that the NFC chip is capable of transmitting data in both directions and does not require device authentication, it can be used as a simple and more convenient replacement for Bluetooth. Using NFC, for example, you can share links, passwords, contacts and other data between smartphones by simply bringing them close to each other.

Introduced in Android 4.0, Beam technology further expands the scope of NFC, allowing you to quickly transfer entire files and folders between devices, which is achieved by pre-authenticating Bluetooth devices via NFC and then establishing a Bluetooth connection and sending files. As in the previous case, all that is required for the transfer is simply to bring the phones close to each other. IN Samsung firmware this function is called S-Beam and allows you to use not only bluetooth as a “transport channel,” but also Wi-Fi (one of the smartphones turns into an access point).

Another possibility is the use of passive NFC tags. These tags, in the form of small stickers, can be purchased for half a dollar each and reprogrammed using a smartphone. Each of them can contain 137 bytes of information (in the case of the most common and cheapest Mifire Ultralight C tag), to read which, again, you just need to bring your smartphone. In the tag you can write the password from home Wi-Fi and stick it on the router. Or a code word to which the smartphone will respond. You can organize the automatic launch of the navigator when you install the smartphone in the holder in the car or enable silent and energy-saving modes when the phone is on the bedside table. A small shopping list of 137 bytes will also fit quite well.

In this article we will talk about all possible applications of NFC in practice, but since in our country payment for purchases using it has been implemented almost nowhere, we will talk mainly about automation based on tags.

Smartphone support

The first phone with integrated NFC support was Nokia 6131, released back in 2006. At that time, the built-in NFC chip was just a toy to demonstrate the capabilities of the technology created two years ago. The smartphone was equipped with software for reading NFC tags, but due to their then high cost and almost zero popularity of the technology, it was not suitable for any serious use this feature I didn’t claim a smartphone.

After some lull, NFC began to popularize Google company, released in 2010 samsung smartphone Nexus S and Google app Wallet, which allowed you to pay with virtual credit cards using NFC. The following year, Google became a leading participant in the NFC Forum and introduced Android 4.0 and a smartphone based on it Samsung Galaxy Nexus, which now boasted the presence of that very Beam function. Later the Nexus 4 appeared, and other manufacturers finally began to catch up.

Today, almost all smartphones produced are equipped with NFC. Even ultra-low-cost Mediatek chips have a corresponding module, so most new Chinese smartphones costing 5,000 rubles are also equipped with it. In any case, the presence of an NFC chip can be easily checked by the presence of the “Wireless networks -> NFC” item in the settings.

Playing with tags

Where can I get tags? As I said, the easiest option is to simply order them from China (dx.com, tinydeal.com, aliexpress.com). The cheapest tags, represented by Mifire Ultralight C with 137 bytes of memory, will cost about five dollars for ten pieces. You can also get branded tags from Sony (SmartTags), but in addition appearance and prices, which will be three to five times higher, they are no different. Another option: TecTile tags from Samsung with an even higher price tag, but also more memory (716 bytes). But here you need to be careful, the first version of the tags is only compatible with the NXP NFC controller, so they will not work with most smartphones.

It is quite possible to use tokens and subway cards as a tag for multiple trips. Often, part of the memory in them remains free for writing, so you can put any information there. But even if this is not the case, the tag can still be used as an action trigger, simply by setting the smartphone to react to the unique ID of the tag.

Without additional software, mobile operating systems have only limited support for “communication” with tags. The same Android does not offer any tools for working with them at all. All you can do is simply bring the tag to your smartphone so that the latter can read it. Depending on the type of data recorded in the tag, the smartphone can display this data on the screen (text type or not supported), open a web page (URI type), launch an application (special type android.com:pkg, supported only in Android) , open the dialer with the specified number (URI type "tel://") and perform some other actions.

There are no means in Android to change the tags themselves or the behavior of the smartphone in response to their detection, so we will have to acquire additional software. The three applications we will use are:

• NFC TagInfo - a tag reader that allows you to obtain the most complete information about the tag and the data recorded in it;
• NFC TagWriter is a proprietary application from leading tag manufacturer NXP Semiconductors;
• Trigger - allows you to independently determine the reaction to a tag with the ability to transfer control to Tasker.

NFC TagInfo

First, let's figure out what kind of tags we got. The Chinese usually don’t provide any details on this matter, and I’m generally silent about subway maps. Launch NFC TagInfo and bring your smartphone to the tag. Next, tap on the Tag Information item and see (screenshot “Reading the NFC tag”) what we have:

• UID - unique tag identifier;
• RF Technology is a standard supported by the tag. In this case, it is ISO/IEC 14443 Type A, that is, a regular RFID tag with support for the first version of the data exchange protocol (Type A);
• Tag Type - the type (or better said, “model”) of the tag. In this case, NTAG203 is Mifare Ultralight C, the cheapest on at the moment tag. The letter C means support for data encryption. There is also Topaz 512, which holds 450 bytes of information, and Mifare Classic 1K (716 bytes), used in TecTile tags and often in metro maps;
• Manufacturer - tag manufacturer. NXP Semiconductors - they make 90% of all NFC tags (Mifare family).

Now we go back and go to the NDEF information menu. NDEF is one of the NFC standards that describes the format for storing information in the tag memory and transmitting it to the reader. A tag can contain multiple NDEF messages, each with its own ID and type, which the smartphone can use to determine how to interpret the data it contains. The type is specified in the format URI, MIME, or domain:service, if we are talking about some type specific to the reader (for example, the same android.com:pkg).

In the NDEF information menu, we are primarily interested in the lines Maximum message size (useful tag size), Is tag writable (write support) and Can tag be write-protected (write protection support). The last option allows you to block tag recording for all devices except ours. In addition, a tag can be permanently locked so that it can never be written down again. In this case, the penultimate option will indicate no.

What's inside the tag?

From a technical point of view, an NFC tag is a microcomputer like those found inside SIM and bank cards. It has its own processor, RAM and permanent memory, but there is no traditional power source. Electric current it receives through electromagnetic induction that occurs between the reader and tag antennas, just as it happens in wireless chargers and passive radio receivers. Thanks to the ultra-low level of energy consumption, the power of such a “transformer” is quite sufficient for the normal functioning of the microcomputer.

The antenna occupies about 99% of the tag area and transmits data at a frequency of 13.56 MHz at a speed of 106, 212, or 424 Kbps. The NFC standards define several data transfer protocols, including several implementations of the data exchange protocol (they are designated by the letters A, B, and so on), which can be supplemented by the manufacturer of the tag itself. For example, Mifare family tags implement a number of extensions over the standard protocol, which is why it is possible to catch incompatibilities between applications and the tag (but this is rare).

Data security is ensured in several ways:

• Short range. Ten centimeters is a very private zone.
• Anti-cloning protection with a unique serial number.
• Possibility of overwrite protection and password protection of data.
• Optional data encryption in memory and during transmission.

The leading manufacturer of NFC tags is NXP Semiconductors. They produce tags from the Mifare family, which have become so popular that compatibility with them is ensured not only by other tag manufacturers, but also by manufacturers of NFC chips for smartphones (at the tag emulation level). The family includes several different models, starting from the simplest Mifare Ultralight C and ending with Mifare DESFire EV1, which have a built-in file system with cryptography support and flexible access rights.

Go to the NDEF message menu. If the tag contains any data, it will all be displayed here, broken down into messages. The remaining NFC TagInfo options allow you to view information about the tag's memory: actual volume, dump in HEX and ASCII formats, access rights to memory pages, and so on. I recommend returning to these options after writing to the data tag.

We write the data

We will use NFC TagWriter to record data. Using the application is quite simple. Launch it, tap on Create, write and store, select New, then select the type of data to be written. The most useful types: contact, plain text, telephone number, Bluetooth connection data, URI and application. The list even includes a web browser bookmark and an email message, but what they are needed for is not entirely clear.

Next, fill in the required fields (for example, the website address in the case of URI), click Next and get to the options screen (screenshot “NFC TagWriter: message options”). Here you can specify the application that will be launched after reading the label (Add launch application) and set protection against overwriting by a third-party device (Apply Soft Protection). The application will also take care to inform us about tag models that can accommodate this data (in this case everything is OK, NTAG203 is in the list).

Click Next again and bring the smartphone to the tag. Voila, our data is in it. Now they can be read by any NFC-enabled smartphone. But what does this ultimately give?

Use cases

In fact, there are a lot of scenarios for using tags. For example, I use tags for storing passwords and home automation, others for automatically unlocking a smartphone and automatically starting a navigator in a car. Tags can be glued to a table, on a laptop, on a keychain, inside a book, on a business card, or sewn under clothing. Therefore, the range of their application is huge, and ultimately everything depends only on your imagination.

Home automation

The simplest and most obvious way to use tags is to simply stick them around the house in order to create some kind of automation system. There are many different options here. I will give you the most interesting and useful ones.

• Home Wi-Fi password. We glue the tag to the router and write the password into it using the InstaWifi application. It will be useful not only for those who often receive guests, but also for those who like to experiment with firmware.
• Launch auto-sync or an application for exchanging data with a PC. The tag can be glued to a laptop or system unit and configured to launch an application for data synchronization (AirDroid, WiFi ADB and others).
• Enable the access point. Again, we glue the tag on the laptop, then install the Trigger application. In it we add a new task, select NFC as a trigger, skip the selection of restrictions, select “Wireless and local networks-> Wifi zone”, skip the next screen (adding a switch) and on the last screen bring it to the NFC tag.
• Turn on airplane mode at night. We glue the mark somewhere closer to the bed. Launch Trigger, new task -> trigger: NFC -> action: “Experimental -> Airplane mode”. Alternatively, instead of turning on airplane mode, you can set the data and Wi-Fi to be turned off by adding the appropriate actions to the task.

Automotive Automation

NFC tags will be very useful for those who use a smartphone as car navigator. Just stick the tag on the smartphone holder and write down instructions for launching the navigator in it - and voila. Everything has become much easier. However, I would recommend going a slightly different route and complicating the setup by adding automatic turning on bluetooth(for headsets), GPS and turning off Wi-Fi.

To do this, we again need Trigger. Launch it, add a task, select NFC as a trigger. Add the action “Bluetooth -> Bluetooth On/Off -> Enable”. Add one more action: “Wireless and local networks -> GPS On/Off -> Enable”. And one more thing: “Wireless and local networks -> WiFi On/Off -> Turn off.” Finally, add the action “Application and shortcuts -> Open application -> select application”. We skip the screen for adding switches, on the next screen we bring the smartphone to the tag.

Now, after installing the smartphone in the holder, we will receive a smartphone fully configured for use in the car.

Unlocking your smartphone

Motorola has a pretty interesting smartphone accessory called the Motorola Skip. This is a clothing clip for quickly unlocking your smartphone without having to enter a PIN code or graphic key. The accessory is quite useful in some cases, but it only works with smartphones from the same company. Fortunately, a similar contraption can be assembled on your knee.

I won’t tell you how to make the clip itself - here everyone is free to show their imagination, you can stick an NFC tag on your hand - but instead I’ll tell you how to set up the smartphone to unlock when you touch it. There are several ways, but the simplest and most effective is the Xposed NFC LockScreenOff Enabler module. The module, like Xposed itself, requires root, but other than that effective solution The task includes a super function - activating NFC when the screen is off.

The point is that for the purposes Android security prohibits the use of NFC until the screen is unlocked (not just turned on, but unlocked), which negates many effective techniques for using it. NFC LockScreenOff Enabler solves this problem.

Business card

NFC tags can be used in combination with business cards. There are several companies on the market that produce them, but their price tags are such that it’s easier to stick tags on ordinary business cards yourself, and still have a lot of money in your pocket. You can write any information into a tag, including contact information (TagWriter supports this format), website address, or even the geographic coordinates of your office (the smartphone will automatically open maps to show the location). And the most important thing is that you don’t have to give the business card to the person, it’s enough for him to scan it.

Turning on the computer

This is a kind of development of the idea of ​​tags on a system unit and a laptop. The idea is to create a setting that will allow you to turn on your computer using an NFC tag without taking into account where the tag itself is located. For example, you can stick it in the hallway, so you can turn on the car even before you take off your shoes. The method is based on the WoL function, which allows you to turn on the computer by sending packets to the Ethernet port, and the Android application Wol Wake on Lan Wan, which does this via the Internet.

How to set it up? First, open the router control panel and configure forwarding of ports 7 and 9 (WoL ports) to our home machine. It is very important to specify the MAC address instead of the IP, since the latter may be given to another device. Next, we go to noip.com, register and receive a free domain, which we will use to reach the router from the outside. If you have a static IP, you can skip this step.

Next, install Wol Wake on Lan Wan on your smartphone, click the Add New button and enter an arbitrary name, the computer’s MAC address and the previously obtained domain in the window that opens, and click Save. Just in case, we check the settings. Next, install Tasker, go to the Tasks tab, create a new task, select Plugin -> Wol Wake on Lan Wan as an action and select the previously created WoL profile. Save.

Now we need to link this task to NFC. To do this, launch Trigger, add a task, select NFC as a trigger, and “Scheduler -> Scheduler Task” as an action (the developers translated Tasker as “Scheduler”), then select the task created in the previous step in Tasker, skip creating switches and At the last stage of setup, we bring the smartphone to the NFC tag.

This is all. If everything is configured correctly, then when a tag is detected, Android will give control to Trigger, it, in turn, will launch a Tasker task, which will activate the profile we need in the Wol Wake on Lan Wan application, it will send the WoL packet to the router, and it will redirect it to MAC address of the computer, network card which... Oh well. In general, everything should just work :).

Conclusions

NFC technology has a lot of applications, and I'm sure that within five years NFC tags and payment terminals will be everywhere, from advertising posters to supermarkets. And I hope that at least this time Russia will not lag behind the rest of the world by fifty years.

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