What is near field communication android

Near Field Communication

Near Field Communication (NFC) is a set of short-range wireless technologies, typically requiring a distance of 4cm or less to initiate a connection. NFC allows you to share small payloads of data between an NFC tag and an Android-powered device, or between two Android-powered devices.

Tags can range in complexity. Simple tags offer just read and write semantics, sometimes with one-time-programmable areas to make the card read-only. More complex tags offer math operations, and have cryptographic hardware to authenticate access to a sector. The most sophisticated tags contain operating environments, allowing complex interactions with code executing on the tag. The data stored in the tag can also be written in a variety of formats, but many of the Android framework APIs are based around a NFC Forum standard called NDEF (NFC Data Exchange Format).

Android-powered devices with NFC simultaneously support three main modes of operation:

1. Reader/writer mode, allowing the NFC device to read and/or write passive NFC tags and stickers.
2. P2P mode, allowing the NFC device to exchange data with other NFC peers; this operation mode is used by Android Beam.
3. Card emulation mode, allowing the NFC device itself to act as an NFC card. The emulated NFC card can then be accessed by an external NFC reader, such as an NFC point-of-sale terminal.

NFC Basics This document describes how Android handles discovered NFC tags and how it notifies applications of data that is relevant to the application. It also goes over how to work with the NDEF data in your applications and gives an overview of the framework APIs that support the basic NFC feature set of Android. Advanced NFC This document goes over the APIs that enable use of the various tag technologies that Android supports. When you are not working with NDEF data, or when you are working with NDEF data that Android cannot fully understand, you have to manually read or write to the tag in raw bytes using your own protocol stack. In these cases, Android provides support to detect certain tag technologies and to open communication with the tag using your own protocol stack. Host-based Card Emulation This document describes how Android devices can perform as NFC cards without using a secure element, allowing any Android application to emulate a card and talk directly to the NFC reader.

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What is NFC? Here’s everything you need to know

All of today’s smartphones are equipped with NFC technology. Whether you realize it or not, your phone is likely using NFC right now. But don’t worry — NFC uses minimal battery and processing power while offering a host of benefits that improve your device’s functionality.

Although it’s widely used in peer-to-peer payment and data-transfer apps, NFC has many more applications that can make your life easier. Read on to find out how you can fully take advantage of your phone’s NFC capability.

What is NFC on my phone?

NFC stands for near-field communication, and it allows phones, tablets, laptops, and other devices to share data with other NFC-equipped devices easily. It evolved from radio-frequency identification (RFID) technology. RFID is behind those security scan cards that get you into the office every day or bypass that tollbooth on your morning commute.

NFC is very much like RFID, but NFC is limited to communication within about 4 inches, which is why you have to hold your phone so close to the contactless reader if you’re using Apple Pay or Samsung Pay. Most people consider NFC’s small radius a major security benefit, and it’s one reason why NFC has taken off as a secure alternative to credit cards. The technology can be used for more than buying coffee at Starbucks, however. NFC can also transfer data like videos, contact information, and photos between two NFC-enabled devices.

How does NFC work?

Unlike Bluetooth, NFC doesn’t require any manual pairing or device discovery to transfer data. An NFC connection is automatically started when another NFC device enters into the previously specified 4-inch range. Once in range, the two devices instantly communicate and send prompts to the user. Listed below are some major ways we already use NFC between devices.

NFC payments

Mobile payments

As we gradually transition to a cashless world, mobile payments have become a popular transaction method. With bank cooperation and the biometric technology built into most modern smartphones, making a mobile payment is secure and convenient. Placing your smartphone within 4 inches of the contactless reader in a store will prompt your digital wallet or passbook to pop up and ask you to confirm payment. With Apple Pay, this means placing your finger on the Home button, which houses the Touch ID function, or double-pressing the Power button to scan your face with Face ID. It also works with Google Pay and Samsung Pay.

Sharing between Android devices

Android Beam, a now-deprecated technology, was introduced in Android 4.0 (Ice Cream Sandwich), allowing Android devices in close proximity to share content. When two enabled NFC devices got in range, a prompt appeared asking if you want to “beam” content like videos, contact information, or photos on-screen to the other Android device. The problem was the feature was not well-known and did not work well, so Google discontinued it with Android 10 in 2019. Google replaced Beam in 2020 with Nearby Share, an Apple AirDrop competitor. Nearby Share works with Android and Chrome OS, allowing data transfer via Bluetooth and Wi-Fi. Nearby Share lets you choose which protocol among Bluetooth, Bluetooth Low Energy, WebRTC, and peer-to-peer Wi-Fi and who can see your phone in their lists.

Julian Chokkattu/Digital Trends

NFC chips

Passive tags don’t require power and can be programmed with apps like Tasker to perform certain tasks when scanned. For instance, you can put one on your desk, and with a quick scan on the tag, you can set your phone to vibrate, disable GPS, or enable only work-related notifications, among other options. Passive tags do not connect with other passive devices and don’t process data from outside sources. Active NFC devices, like smartphones, can send and receive data and communicate with either active and passive devices.

Which devices have NFC?

The list of NFC-equipped devices is growing every day. To keep track of what devices are taking advantage of NFC technology, NFC World maintains a mostly up-to-date list of NFC-enabled phones. Many Android devices have NFC, and every iPhone since the iPhone 6 also packs the feature.

Every iPhone since the iPhone 6

For a long time, Apple restricted NFC-equipped devices to make purchases. However, the latest iPhone models, including the iPhone 12, 12 Pro, 12 Pro Max, and 12 Mini, also support NFC tags through the Launch Center Pro app. Version 3 of the app includes NFC triggers for iPhone XR, XS, and XS Max for actions via custom NFC stickers. The iPhone 7 and newer phones can use in-app NFC scanning.

Launch Center Pro for iPad has been retired, and the iOS version now supports both iPhone and iPad. For a full breakdown of all Apple devices that support NFC and their limitations in terms of Apple Pay, check this Apple support page.

Every device running Android 4.0 and later

If your device is running Android 4.4 or later, you can use Google Pay. If you have a Samsung device, you can also use Samsung Pay.

Android phones operating on Android 4.4 to Android 9.0 can also use Android Beam for a message or file exchange. You can pass a lot of information to others, like YouTube videos, contact information, specific webpages, and much more. To start Android Beam, just go to your phone’s settings. For Samsung Galaxy S10, navigate to Settings > Connections > NFC and Payment . From there, select NFC , and then scroll and tap on Android Beam . When using the beam feature, it’s best to place your phone near another device with an NFC chip. A notification will pop up, asking you to confirm whether you want to connect to the detected device.

What else can NFC do?

NFC is capable of so many tap-and-go functions — digital wallets like Apple Pay, Google Pay, and Samsung Pay cover just a tiny fraction of its capabilities. Music lovers can connect their device to speakers quickly through NFC, and you can also log in to your work computer with a tap on your phone, unlock your car door, or track your health and fitness stats.

This technology is in the process of overhauling public transportation — you can scan an NFC-enabled smartphone on some buses or use them as metro passes in some places. You can add money to a bus or metro pass directly through an app, always ensuring you have funds on your card. This technology is capable of supporting loyalty cards and student IDs. Finally, there’s also the possibility to implant an NFC chip into your body .

Clearly, you can use NFC tags for a variety of activities. One way to learn more about this technology is to consider creating NFC coasters to grant visitors access to your home Wi-Fi .

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What is NFC? A complete guide to Near Field Communication and its uses in Android smartphones

What is NFC? How does NFC work? What is NFC for? Does my smartphone have NFC? Uses of NFC, Near Field Communication explained

NFC (Near Field Communications) is a feature of many portable devices these days. NFC is a short-range high frequency wireless communication technology that enables the exchange of data between two devices over about a 10 cm distance. This allows for two-way communication, with both devices involved being able to send and receive information. The NFC connection does not rely on Wi-Fi, 3G, LTE, or otherwise, and it does not cost anything to use.

NFC is an upgrade of the existing proximity card standard (RFID) that combines the interface of a smartcard and a reader into a single device.

RFID, or radio-frequency identification, is the technology used by shipping companies, in large warehouses, and in superstores to keep track of goods. It uses electromagnetic induction in order to transmit information over a short space so that by simply scanning a container a staff member can know what it contains. NFC is similar technology, but standardised for consumer smartphones.

While this ultra-efficient form of wireless communication may not look very powerful, it is quite handy when it comes to transferring data between two devices. Whether you want to send photos, videos, files, or make a payment, NFC can make it easy to do so. You can trigger all kinds of cool actions on your smartphone combined with hi-tech stickers called NFC tags, useful NFC apps, or another NFC-enabled device.

Here’s all you need to know about what NFC is and why you should use it.

How do I know if my Android smartphone has NFC?

Just open Settings > More and see if there’s an NFC option hiding there. Most smartphones that have NFC place a small NFC logo on their rear panels, too.

How does NFC work on Android?

NFC transmits or receives data via radio waves. It’s an established standard of wireless communication, so if devices stick to the NFC protocols, they can communicate with each other. It differs from Bluetooth in that it functions through electromagnetic induction. This means that there can be a passive device, such as a poster or sticker that does not need power source of its own, that can transmit data when an active device, like your smartphone, comes into contact with it. As an active NFC device, a smartphone can send and receive data over NFC. NFC’s data-transmission frequency is 13.56MHz. NFC can transmit data at 106, 212 or 424 Kbps (kilobits per second).

It encompasses the full range, three modes, of NFC:

Reader/writer (e.g., for reading tags in NFC posters)

Card emulation (e.g., for making payments)

Peer-to-peer (e.g., for file transfers)

What can I use NFC for?

1. Connecting with NFC tags

NFC tags are small physical “tags” or “stickers” comprising of NFC chips that can be programmed to offer any type of information to your smartphone. Normally, an NFC tag has links to a web address, but it can also be set to perform certain actions with your smartphone, like turn on the Wi-Fi, or turn down the ringer.

These tags could be embedded into just about anything in the future. An NFC tag, for instance, could be used in a restaurant menu to make the most up-to-date version of it available instantly on your smartphone. All you would need to do is bring your smartphone into proximity with the physical menu, and you could possibly browse more thorough information of certain menu items, like nutritional values or ingredients. Where NFC scores over current QR technology is that there is no need for a “scanner app”: the information is available immediately.

2. View Public Transit Card Details

These days most of the major cities use bus and train cards that have NFC. It’s how you can just tap your card to the terminal to pay your fare. While most of the public transit systems use encryption to safeguard the transaction, the decryption key in several cities is available to the public. In other words, if you are residing in an eligible city, you can install an app called FareBot to read the information stored on your transit card, which includes balance, trip details, and any other transactions.

3. Send Files, Photos, & More with Android Beam

Android Beam is a great feature that comes with every NFC-enabled Android device. By simply bringing two phones together, you can send files, share photos, and even beam links to another Android device. It’s a cool way to share content with your friends and family.

All you need to do is enable NFC and Android Beam on both devices (Settings > More), then go to the file you wish to send, for example, a photo, and tap the devices together. That’s right, you don’t even need to choose any “send via” options, just put the devices back to back, and when it asks to confirm the transfer hit “touch to beam”. You can also do this with the help of a dedicated app such as File Beam, and the result is a much simpler and faster way of sending files between two neighbouring handsets.

4. Ditch Your Wallet with Android Pay

Mobile Payments is one of the most common uses of NFC. This used to be called Google Wallet on Android, and it was only limited to Nexus devices.

However, Google Wallet was recently refurbished and rechristened to Android Pay (even though the Wallet app still exists), which is available to all Android devices running KitKat or higher. You can pay for goods and services by using just your phone. All you need to do is to install the app, add a card, and tap away.

5. Share Wi-Fi Passwords with Friends

It is troublesome to verbally share a secure Wi-Fi password that contains numbers, symbols, and capitals. However, this hack allows an NFC tag to do all of the work for you. Called InstaWiFi, this app allows your guests to just scan an NFC tag to automatically log into your Wi-Fi network.

The other user will either be logged automatically into your Wi-Fi network, or prompted to install InstaWiFi based on their Android version. At this point, they just need to open the app and tap their phone to your NFC tag to log into your network.

6. Tap Your Wallet To Check Your Bank Account Balance

This next trick just requires an initial setup. Once done, all you have to do is tap your phone against your wallet and you will be able to see your bank account balance at any time. To start off, ensure that you are enrolled in your bank’s Text Banking feature. Then, install an NFC-automation app called Trigger, as well as its SMS plugin.

Open Trigger and create a new task using NFC as the trigger, leaving all restrictions disabled. Next, add an action to your task, then under the Messages category, go and select the “Send a Text Message” option. Enter your bank’s automated balance request phone number as the recipient, and then enter the balance request command as the message. Check out this thread on Pastebin or contact your bank directly to know the list of text banking phone numbers and commands for well-known banks.

You will then be prompted to scan an NFC tag, once you have finished setting up your Trigger task. Get hold of one of the tags that you have purchased online and hold it up next to the phone to scan it, and then pop the tag into your wallet.

By simply tapping the back of your phone against your wallet (with the NFC tag inside), you can now easily check your balance. When Trigger senses the NFC tag it will immediately text your bank and you will get a reply with your information in seconds.

7. Make Your Remote Tell You What’s On TV

While this is similar to the previous NFC trick, this one requires you to install the Trigger app to automate a task when your phone scans a particular NFC tag. Since, it allows you to tap your phone against your remote to see the upcoming TV schedule, this trick takes laziness to the next level.

To start, create a new task from the app’s main menu, and then ensure that you select NFC as the trigger, and when prompted leave all restrictions disabled. Next, add an action to your task, then choose “Open a URL/URI” from the Applications & Shortcuts section. Then, enter the URL of your favorite TV listings website, then press “Add to Task.”

Trigger will ask you to scan an NFC tag to launch the task once you are done. So keep that in mind, and insert the tag behind your TV remote’s battery door. Henceforth, just tap your phone against the back of your remote whenever you would like to know what’s on TV, and the TV listings website that you have entered will automatically come up.

8. Wake Your PC Remotely

In this trick, all you need to do is just adjust a few options on your Windows computer, and then installing a few apps on your Android phone. Click on the link below to know how you can get this feature set up in no time.

9. Force Yourself to Get Out of Bed

Do you find it difficult to get out of bed in the morning? Well, NFC can in fact help you with this. Sleep as Android, which is a sleep monitoring and alarm clock app, has a feature that needs you to scan an NFC tag before your alarm is dismissed. In other words, you can stick a tag in your bathroom to actually force yourself to get out of bed before your alarm will stop ringing.

If you wish to try it out, you need to go to the settings menu and choose the CAPTCHA option, and change the Default CAPTCHA to “NFC tag.” Then, follow the prompts to scan and learn your NFC tag. Further, in order to dismiss your alarm, you will have to physically get out of bed and scan this tag.

Some problems with NFC on Android

However, there are some security issues with NFC.

• Not all devices bear an NFC chip, but they are becoming more common

• Since NFC occurs in the free and open air, it is easy to get gripped in the idea that your data can be nabbed by anyone who tries to intercept

• NFC chips are not all located in the same place, resulting in some exploratory copying between devices

• Cross-compatibility between devices is not universal, especially when it comes to specific file types

Do you use NFC on your smartphone? What do you use for? Also, let us know if you have any other tips for staying secure with an NFC-enabled device in the comments section below.

While you are at it, surely there will be no problem to play casino on Android, from your smartphone. Today there are many applications that allow, to play casino online, with your phone, wherever you are.

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