Hot Network Questions Transparent Glass Material Eevee Blender version 4. A quick overview of how a communication cycle with an NFC T4T tag works: 1. Android NFC writeNdefMessage throws IOException Tag is not ndef. action. Printing tags . NFC tags come in many different shapes and formats. To simply write to one blank NFC tag, make sure all of these options are unchecked. Where NFC This app emulates an NFC Forum Type 4 Tag on an Android device using Host-based Card Emulation ("HCE"). receiveMessageFromDevice(intent) override fun onResume() {. Po drugie, będziesz potrzebować programowalnych tagów NFC. Mar 27, 2013 · The only 100% way to make NFC tag "read only" is to call makeReadOnly (), but this is irreversible. Go ahead and tap the May 17, 2021 · The NFC features also make tagging objects much easier because a new tag is created anytime it enters the NFC range. . I am doing NFC Tag Writing process in another activity called WriteNFC. You receive a TagLostException because you send an invalid command to the tag. addFlags(Intent. Click on NFC device tag and say “ok” to write a new tag iv. Open your phone’s app store: Go to the app store on your smartphone. getParcelableExtra(NfcAdapter. I want my main activity reads and displays tag data, when the tag comes into range. One of the best options is the NFC TagWriter by NXP; the app is easy to use and available for both mobile platforms. Such a behaviour is called Card Emulation. ] Mar 26, 2023 · I have an NFC-capable phone (Nokia G60, Android 12) and a bunch of NFC tags/cards. You should treat onNewIntent as a notification that a tag is in range for you to read or write from/to the tag (in Jun 25, 2022 · The NFC communication system consists of two separate parts: the NFC reader chip and the NFC tag. Find out how to check if your phone has NFC, how to set up Google Pay or Samsung Pay, and how to program NFC tags with an app. Now just scan the tag to download your vCard. 0. Please be sure that your NFC option is on before using the application. Apr 14, 2014 · Obviously my first shot answer wasn't right. First of all you have to initialize the NFC adapter and define Pending Intent in onCreate callback: //nfc not support your device. Dec 22, 2022 · So a lot of NFC stuff is custom to the make and model of the NFC Tag, luckily your Amazon links say your using an NTAG215 which is a NFC Type2 Standard Tag. Mar 3, 2019 · Mit Bordmitteln von Android gibt es die Möglichkeit, die Details eines WLAN-Netzwerks in einen NFC-Tag zu schreiben. On a Samsung Galaxy smartphone or tablet, the path to find out whether you have NFC is even shorter. You need the URL to that page. Apr 25, 2014 · In my application, I got two options : Writing and Reading a NFC tag. Search for NFC in the search bar and open it. May 26, 2011 · 6. While most modern smartphones often support NFC, not all Android devices have this capability. Feb 13, 2012 · NDEF is a way of formatting data on the tags. While it can be used for advanced automation of things on your Android phone, it can also be used for equally simplistic stuff, like easily sharing your home Wi-Fi Jun 5, 2023 · Go to Settings on your phone. Web NFC API – MDN; Interact with NFC devices on Chrome for Android – Web. While RFID tags are mostly used for tracking purposes, NFC tags have a variety of uses. Full method. private void handleIntent(Intent intent) {. Firstly, to access NFC hardware you need to add the following permission in AndroidManifest. When I'm trying to read an NFC tag, its perfectly working for URI and texts. Go deeper with our training courses or explore app development on your own. ACTION_TECH_DISCOVERED — NFC tag discovered and activities are registered for the specific technologies on the tag. This, combined with the affordable price of tags (from ~0. LINKS & REFERENCES. Mifare and the 4 tag types can all be formatted to store data in a NDEF format. Data representation on NFC tag when writing with Android. You are discarding the exception message and stack trace, which can be very useful for this kind of problem. So using this should do the trick: protected void onNewIntent(Intent intent) {. – ris8_allo_zen0. Editable user defined NFC tags. 0x01020304. 1 Jul 28, 2012 · <intent-filter> <action android:name="android. Locate where the NFC tag is located on the object you are scanning. Essentials. nfcAdapter. 3) to main app using sendIntent (or similar supported method). Erreichbar ist dieses Feature ab Android 5. Aug 8, 2012 · 3. Despite its name, Open NFC was not as open as its name suggested and was primarily targeting Inside's range of Jun 25, 2023 · NFC – CanIUse; At the time of writing, Web NFC is pretty much an experimental feature supported on Android Chrome and Baidu browser only. util. nfc. Android Application emulation. Back in the early days of NFC on Android, Inside Secure developed and published the NFC stack "Open NFC". Szukaj Tagi NFC w Jul 9, 2014 · From Android Developers: When a device scans a tag that has NDEF data on it, but could not be mapped to a MIME or URI, the tag dispatch system tries to start an activity with the ACTION_TECH_DISCOVERED intent. g. It displays nothing. Log. <uses-permissionandroid:name="android. AndroidManifest. Kits & more. Mar 22, 2015 · Learn how to buy, program, and use NFC tags with your Android phone for various purposes. Controlling your smart home with NFC tags is easy and affordable. May 8, 2015 · Android NFC : Tag lost when APDU command sent to a smart card. Download the Decode NFC App. I. I would like to use these events to update a user interface indicating that an NFC device is in range before the stack sends the intent. that allows the NFC stack to find out if the tag is still responsive. Most modern smartphones are capable of writing to and reading from NFC tags. It is possible physically for the phone hardware but there are software problems, payment works but it's provided by google. Nov 3, 2019 · Android Nfc读写标签. repeated deactivation and re-activation cycles, repeatedly reading a certain memory area, or. Now, I know that this then allows websites to interact with data on NFC tags, and allows you to script Apr 25, 2014 · In my application, I got two options : Writing and Reading a NFC tag. Design a beautiful user interface using Android best practices. Consequently, android. Sep 23, 2016 · If you had an NFC tag, you would touch the back of your NFC-equipped smartphone to the NFC tag. text = "Searching" override fun onNewIntent(intent: Intent) {. I have read a ton of forum posts on this subject and people have said its too hard to bother doing. About NFC. Before you start the encoding, make sure you have created a page on the internet to display the Wi-Fi SSID and password. You can trust the app to program NFC tags in terms of accuracy. When an Android-powered device discovers an NFC tag, the desired behavior is to have the most appropriate activity handle the intent without asking the user what application to use. Its writable but seems like it is not formatted in NDEF which is a pre-requisite for Android devices to be write data on it. 3)写入数据. starting an app)? I am asking whether the support is there by default, I know I could build my own app to listen for NFC events and handle them. Hackers can do this by inserting a USB or by making a hole in the machine to access the interiors; now, this NFC hack can be done merely by holding a phone in close proximity. Encode that link onto an NFC tag. Oct 26, 2012 · Android has 3 main types determined for cards, those are Mifare Classic, Mifare Ultralight and Isodep (this is the type of Desfire and Desfire EV1). Here are the things you need to set up your programmable NFC tag. Mar 7, 2018 · 25. For example, if I get in my car and tap a tag on my dashboard, I would like Waze to open. After all, that's what NFC tags are supposed to be used for. Jul 11, 2021 · The NFC application will let you read the data in the NFC tags just by placing the NFC card behind your android device. NFC-A tags are the most common tags (for example, both the MiFare DESFire and specialized chips like the ones in electronic passports use NFC-A), but you may experience problems if you use other tags. xml. Tag is activated (anti-collision, activation, etc). NFC-Enabled Device. For iPhone, hold the top-center of your phone within 1 inch of Tap Tag while this message is up (as seen in picture). Once you’re on the “NFC” screen, you can easily toggle the button to turn it off – as well as back on – when 向NFC标签写入数据一般分为三步:. Wählen Sie dann den Abschnitt Neu, um mit dem Hinzufügen der Informationen zu beginnen, die auf Ihre NFC-Karte geschrieben werden sollen. Name the tag whatever you want, but remember to touch the NFC tag to the phone to make sure it's configured correctly 3b. Jul 29, 2022 · Schreiben Sie Inhalte auf Ihre NFC-Karte. I would like to launch an app or run an action automatically when I tap my phone to a tag. Hello world. Feb 12, 2020 · NFC stands for Near Field Communications, a short-range wireless technology operating at 13. Add the alarm you wish to create, and ensure that you’ve checked the box next to “ NFC Only “. whenever an external HF field is applied to the NFC antenna of the Android device. Jun 30, 2022 · The technique is called a "jackpotting hack. Android isn't the only platform that supports NFC -- Windows Phone devices like Nokia's Lumia series and HTC . So lets continue discussion. category. Mar 1, 2024 · Advantages of Android for Reading NFC Tags. nfcStatusText. Jul 29, 2023 · And NFC tags being programmable makes it even better. 文章介绍 NDEF 和 MifareClassic 两种格式数据读写标签的方法。. But another fun use case is to get printable NFC cards. Jan 24, 2013 · In the Chrome Browser, navigate to chrome://chrome-urls and choose the flags link (or just go straight to chrome://flags ), then in the search bar type NFC. If you have an Android device, open the Google Play Store, and if you have an iPhone, open the App Store. Jul 17, 2014 · Head on into Trigger, navigate to the My Tasks section and click the “ + New Task ” button in the top right to get started. If it is turned on, tap the button to turn it off. NFC Tools - Pro Edition - Apps on Google Play. 811 3712-6788/? D/NativeNfcTag: Stopping background presence check. 2 What makes Python better suited to quant finance than Matlab / Octave Jul 31, 2022 · It means that your NFC (Near Field Communication) is turned on and your phone has come into contact with an NFC-enabled device or credit/debit card. d(TAG, "NFC TAP WHILE ACTIVE"); Tag tag = intent. The Tag can be read at the low level using the NfcA standard. *_DISCOVERED intents are only sent to activities, they cannot be received though broadcast receivers. TagTechnology | Android Developers. NFC Stickers are great to make existing objects scannable, like books or photos. 1. Aug 4, 2016 at 13:40. Uses for NFC on Android phones include file sharing, contactless payment systems, and programmable NFC tags. Here are some popular uses for NFC tags on Android devices: Smart Home Automation: NFC tags are employed to streamline smart home automation, allowing users to trigger Oct 7, 2023 · NFC-enabled iPhones can read tags without additional software, but your experience may vary on Android. May 5, 2016 · The NFC discovery intent is passed to the onNewIntent() method in the parameter Intent intent. Now your smartphone is looking for an NFC tag to encode. For android, place backside-middle of phone onto Tap Tag. intent. e. 1)获取Tag对象. . Sep 30, 2021 · Main features: Text tag emulation. Get one of our Figma kits for Android, Material Design, or Wear OS, and start designing your app's UI today. The great thing about these cards is that they are very Dec 18, 2018 · TypeVはNFCフォーラムの規格にはありませんが、Androidでは利用できます。. URL emulation. But whenever i try to read the tag. Tap on “ Add Now “, and tap your phone on the NFC tag you wish to use. I read about using phone as nfc tag recently and even if you can make it work card reader expects like logical address from you when you connect and card has it static while android sets new for itself with every Feb 15, 2024 · Select “Add Macro” i. Card emulation can be host-based (HCE) or secure-element based (CE). ReadActivity". Tap the top of your iPhone to where the NFC tag is located on the object. FLAG_ACTIVITY_SINGLE_TOP), 0); In onResume () Call back enable the Foreground Dispatch to detect NFC intent. Programming an NFC tag from your NFC capable Android device is extremely easy and can lend itself to some very useful scenarios. DEFAULT"/> </intent-filter> I believe this is fine as when I use the NFCDemo sample app that comes with the SDK to create MockNDEFtags, when the list of applications I can choose to handle these generated tags my app appears. Data can be read or written to this tag only when another NFC device is brought near it because it Sep 27, 2023 · On standard Android, like on Google Pixel smartphones, access Connected devices, and on the next screen, tap Connection preferences. RFレイヤーが同じでもこのタグタイプの違いによって読み書きの仕方が変わってきます。. super. some other ping-pong command sequence. " You will see multiple options on the next screen. android. This writes the URL to the tag. Log. Then add the stack trace to your post. Jul 1, 2019 · D/NativeNfcTag: Tag lost, restarting. 在进行Nfc的读写之前,了解卡片的存储结构是非常重要的(非常重要,尤其对理解MifareClassic数据格式)。. Dec 23, 2019 · Update: Re-reading your code, it seems that when you write you are assuming the tag is in range. service. 2019-07-01 16:42:15. Finally, select “Write” at the bottom of the screen and tap the back of your phone to a blank NFC tag as if you were going to read it. 2. Android offers unique advantages for reading NFC tags compared to other mobile operating systems: Widespread NFC hardware support – Most modern Android devices contain NFC radios that can read tags. InstaWifi. You will then see “NFC. Sobald Sie die App erfolgreich auf Ihrem Android-Gerät installiert haben, öffnen Sie sie und klicken Sie auf die Option Erstellen, schreiben und speichern. For example, NFC tags can be programmed to open a website, turn on Bluetooth, or share your Wi-Fi password with a friend. タグタイプはNFCタグのフォーマット等に関するタイプです。. 56 MHz that enables communication between devices at a distance less than 10 cm and a transmission rate of up to 424 kbit/s. Search for an NFC reader app: In the app store’s search bar, type in “NFC reader” or “NFC scanner” and tap the search button. return; getClass()). Nov 1, 2023 · binding. Dec 20, 2012 · I've a Mifare Classic1K NFC tag but I'm unable to write any content over it. To be compliant with the specification a service is running independent on the app opened that serves an Application Identifier ("AID") with the value D2760000850101. May 20, 2021 · NFC tags are small physical “tags” or “stickers” containing NFC chips that can be programmed to provide any kind of information to your smartphone. Here's how to do it: Open Settings > Connected devices . That will surely solve your problem, as you will no longer be using the NFC service and it won’t allow any further notifications. Mar 7, 2023 · 4 Fun Ways to Use NFC on Your Android. permission. It appears that only a new Activity can be launched, not Service, although it could receive the same Intent filter. I will show you some NFC smart home ideas, how to set them up on iOS 14 and Android, and ho This is typically either. Once you open the app, you see 4 tabs on the top – Read, Write, Others, Tasks. Android recognizes these tag types when you use the NDEF class for accessing and filtering tags it scans. May 12, 2024 · An NFC tag is a small integrated circuit consisting of a copper coil and some amount of storage. First, we setup the Triggers for our actions. Download the app from the May 31, 2012 · Download and install NFC TagWriter and use it to send a piece of data to a tag -- it doesn't matter what -- and that will ensure that it is formatted and prepared for use with NFC Task Launcher Nov 24, 2019 · 0. When the two or so options are presented, change the flags from default to enabled. Tap on “ Proceed “, once the phone recognizes your NFC tag. Oczywiście sprzęt NFC musi być włączony, aby wszystko inne działało. Some Android phones have the NFC option in the system tray menu at the top of the screen. Tag tag = intent. hardware. I was successful at retrieving the data from the tag whenever I scanned it. Apr 22, 2016 · I have followed many guides and tutorials and they have this line, Tag tag = intent. Also, at the moment, every tag technology supported by Android's HCE is supported (A, B, F), however NFC-B and NFC-F remain untested. Option 2. EXTRA_TAG); Apr 14, 2014 · Obviously my first shot answer wasn't right. The datasheet for this Tag tells you all you need to know about what "NFC_READ_COMMAND" needs to be to read this card. Search and search for “NFC” iii. TAG_DISCOVERED"/> <category android:name="android. Nov 27, 2015 · write NFC Tag in Android. Many apps on the Google Play Store and Apple App Store can write tags. Typically, an NFC tag contains 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. If the problem still continues, move on to the next method. if second app is "third party app" and cannot work with upper soultion, you can register your own NFC reading app (intent with right mimeType filter) and then pass your data (point no. 9. If you like the app, please rate it to support us! Updated on. The NFC writer app supports a wide range of NFC tags like NDEF and RFID. Sep 3, 2013 · Android NFC Tags. Full history with export. Since NFC-F tags remain silent upon reception of invalid commands, Android cannot distinguish between an actual loss of communication or the negative response to an unsupported/invalid command and throws a TagLostException in both cases. These are old posts however, and with the…. Turn off the NFC toggle switch. 7. For more information on how to tag objects and use advanced operations, refer to Android's developer guide on tagging . Use NFC Tags In the Best Possible Way. 操作步骤,实际运行效果如下: 点击自动打开短信界面或百度页面,进入对应Activity,将NFC标签贴近手机背面,提示写入成功。. Web NFC provides sites the ability to read and write to NFC tags when they are in close proximity to the user's device (usually 5 Feb 10, 2015 · Im a newbie at NFC on Android, but have managed to have an app read & write to a NFC tag. In HCE, an application running on the Android main processor responds to the reader. dev; W3C Web NFC If it is a simple tag then you could use an app like these to "emulate" it: NFC NDEF Tag Emulator - Apps on Google Play. Sep 25, 2023 · How to Scan NFC (iPhone 7, 7 Plus, 8, 8 Plus, X) Watch on. ) A single NDEF message can consist of multiple NDEF records. This is easy. Nov 17, 2022 · Now, select “Save & Write. Training courses. NFC Tools is a simple app that lets you read, write, or erase NFC tags. Mifare Classicはヨーロッパなどで Jul 22, 2021 · The process to disable NFC is simple. Share files, make mobile payments, and more with NFC technology. So, the phone needs to be ON. Writing process seem to be ok. Then, you should see an NFC or Near Field Communication entry listed right after Bluetooth. Dec 3, 2014 · NFC on Android was designed as a form of (intentional) user-interaction (and consequently uses user-visible activities). Not all Nfc tags (even the standard ones and Mifare) will be set up for Ndef, or will hold Ndef formatted data. Jul 25, 2012 · The free Android app lets you program an NFC tag that, when tapped with an NFC-enabled device, gives the phone or tablet instant access to the associated Wi-Fi network. Im not sure if im missing something or why others seems to work but not mine. Learn how to turn on NFC on your Android phone, use it for mobile payments, and program NFC tags with various functions. Click "Write" to be prompted with an NFC "Ready to Scan" message. Build AI experiences. But when I'm trying to read an empty NFC tag its showing a default "Empty tag" message which is not defined in my code. Near field communication (NFC) makes it possible to exchange information between smartphones and other smart devices quickly. Near-Field Communication, or NFC, is an incredibly useful technology that gets ignored far too often. Nov 1, 2016 · Step One: Erase Your NFC Tag. Mar 14, 2012 · The Ndef technology method getMaxSize() will return the maximum NDEF message size that will fit on the tag, as noted in another answer here. EXTRA_TAG); Jul 30, 2017 · <uses-feature android:name="android. If you have a non-Samsung device, then you may find “Connections” under “Bluetooth Connections. IsoDep:各种交通卡。. Znajdziesz opcję NFC w sekcji Więcej opcji Sieci zwykłe i bezprzewodowe. UI Design. The device has no secure element but still uses a static UID (typically not unique ), e. Design & Plan. The app will ask you to add a new NFC tag. [Thanks to ErikM for pointing this out. get方法). Trigger and click on the + icon ii. 7 "New Tag Collected" instead of reading tags of application - NFC android. Only if the presence check fails, Android will switch off the HF carrier of the NFC reader and will re-start with Nov 15, 2023 · 1. Like Wi-Fi, Bluetooth, and other connective technologies, NFC simply toggles off. xml: android:name=". Launch the app and select NFC. If it is enabled, the NFC sensor will look for magnetic objects within its operating range, such as a bank card. So there is no official support for NFC in the Android device emulator. // not to start another instance of this activity. Build AI-powered Android apps with Gemini APIs and more. The Read option lets you scan and read the details of the tag such as the serial number and type of the tag. 0 Lollipop, indem Ihr in der Übersicht der aktuellen Netzwerke lange auf das gewünschte Netz tippt. NFC ReTag PRO - Apps on Google Play. EXTRA_TAG); Which does'nt work because Tag needs a Tag but it is receiving a Parcelable object. NFC capabilities can also be used to make payments. NDEF discovery is performed (Android checks if the tag contains the NDEF Tag application and tries to read the NDEF message. Because the tag can go in and out or range easily and frequently it is much more reliable to write as soon as onNewIntent is fired. The method Android-powered devices are usually looking for NFC tags when the screen is unlocked, unless NFC is disabled in the device's Settings menu. It can also be enabled in Opera by toggling the “enable experimental features” flag. Apr 22, 2024 · Automate. Sep 7, 2012 · 3. When a tag is found, the message “New tag scanned” will show up. Encoding Wi-Fi and a link to the NFC tag – For iPhone and Android. NFC tags can also launch apps on a paired device (Android phone). May 16, 2023 · 3. 5 USD per piece), is making NFC an attractive feature for some app creators. Wählt jetzt die Option "Schreibe auf NFC-Tag". Dec 23, 2011 · On an Android device equipped with NFC reader hardware, is there any in-built support to use the NFC tag contents to fire off an intent (e. I am currently involved in a project in which I need to communicate using NFC. Android-powered devices are usually looking for NFC tags when the screen is unlocked, unless NFC is disabled in the device's Settings menu. e("NFC", "Exception", e); to read the exception info in your LogCat. 如:北京市政交通卡 Mar 16, 2020 · an application that wants to handle the scanned NFC tag can declare an intent filter and request to handle the data. Step Two: Write the Wi-Fi Data to Your NFC Tag. NFC is included in a wide variety of devices, including Android devices like the Nexus 4, Galaxy Nexus, Nexus S, Galaxy S III and HTC One X. It provides power and sends NFC commands to the passive part of the system, the NFC tag. Jun 29, 2023 · NFC (Near Field Communication) is a technology that enables devices to exchange data wirelessly over a short distance. Get started. " Jackpotting is usually done by accessing the insides of an ATM to install malware. Google never implemented support for NFC in the AVD. ”. In onPause () callback you have to disable the forground dispatch: Jun 26, 2023 · Step 8: Select connect. We used an app called Trigger to write our Jul 29, 2017 · Nfc Forum Type 4 Tag on Android. The device generates a new random UID on every activation by an external reader device. So if you want to utilise an NFC tag, the first requirement should be a device equipped with an NFC reader or Then scan a tag on the reader and note down the device_id from the data section. 2)判断NFC标签的数据类型(通过Ndef. getParcelableArrayExtra(NfcAdapter. MifareClassic数据格式就是NfcA。. Just below the toast in the catch block, please add android. The biggest tags I have come across can store 32kB of NDEF data, but this takes inconveniently long to be read. Request NFC access for your app. The next step is writing the data on the tag. Mar 28, 2024 · Learn how to activate and use NFC on your Android device for various purposes, such as contactless payments, file sharing, and automating actions with tags. 返回主界面,再将NFC Jan 11, 2024 · On Android devices, NFC tags are leveraged for a multitude of purposes, enhancing user experiences, streamlining tasks, and enabling seamless interactions with the digital world. Dec 11, 2020 · These are our NFC Intent filters nfcAdapter. This might be on Google Drive or perhaps as simple as using the Notes app on iPhone. This is so that Dec 14, 2016 · Here, tap on the “+” button to set up a new alarm. Originally, I had one NdefRecord in a NdefMessage on the tag, basically some data. Możesz wyszukać w Internecie swój model telefonu i „NFC” lub po prostu otworzyć jego ekran Ustawienia. Start by creating your first app. You can access your previous data in the tag as the NFC writer tracks history. Jan 12, 2016 · Now the Android app is ready to handle the NFC tag and when the Android smartphone gets near the NFC tag, the event is notified to the app. Near Field Communication (NFC) is a short-range protocol of communication between devices, typically between an NFC tag and a scanner. The NFC reader chip is an active part of the system because, as its name suggests, it “reads” (or processes) information before triggering a specific response. Just follow our instructions for encoding tags for Android or encoding tags for iPhone to get the link onto your NFC tag. Aug 26, 2016 · 2. ACTION_TAG_DISCOVERED — NFC tag discovered. 3. NFC"/>. Flexible development environments – Android’s NFC API is accessible using native Java or Kotlin Aug 16, 2017 · 0. How do i create an Tag object in android? 7 "New Tag Collected" instead of reading tags of application - NFC android. Go to Android & Material kits. Note: If you want your application to show Build AI experiences. onNewIntent(intent) // also reading NFC message from here in case this activity is already started in order. So, as I get a tag touched, I run this operation: private String[] getTagInfo(Intent intent) {. Contact sharing systems (one-link sharing) Jul 24, 2014 · Last week in our Android customization series we showed you a quick method for using an NFC Tag to put your Android device into a sort of bed time mode. Its possible to make Android device behave as an NFC Tag. Jun 1, 2022 · To turn off NFC, go to “Settings” in the app drawer, and then open “Connections. nfc" android:required="true" /> Lastly, we need to create an intent-filter on the activity we will be on when writing to the NFC tag. Go to Wear OS kits. NFC tags can automatically perform actions when you touch them or place your phone on them. NFC Tools. ACTION_NDEF_DISCOVERED — NFC tag discovered with NDEF payload discovered. nfc. bl ct va ta rn ms ny sw ff re