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In this case, no will be specified in the penultimate option.įrom a technical point of view, an NFC tag is a microcomputer like those found inside SIM cards and bank cards. In addition, a tag can be locked forever, so that it can never be written to again. The last option allows you to block the writing of the tag for all devices except ours. 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 type is specified in the format URI, MIME or domain:service if it is a type specific to the reader (for example, the same :pkg).

WOL WAKE ON LAN WANANDROID APP HOW TO

A tag can contain several NDEF messages, each with its own identifier and type, which the smartphone can use to determine how to interpret the data it contains. NDEF is one of the NFC standards that describes the format for storing information in tag memory and transmitting it to the reader. Now we go back and go to the NDEF information menu. NXP Semiconductors - 90% of all NFC tags are made by them (Mifare family).

Manufacturer - the manufacturer of the tag.

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 The letter C stands for data encryption support. In this case, NTAG203 is Mifare Ultralight C, the cheapest tag at the moment.

Tag Type - the type (or, better, "model") of the tag.

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In this case, this 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)

RF Technology is the standard supported by the tag.

Next, tap on the Tag Information item and look (screenshot "Reading the NFC tag"), what we have: We launch NFC TagInfo and bring the smartphone to the tag.

The Chinese usually do not report any details on this matter, and I generally keep quiet about metro maps. To begin with, let's figure out what kind of tags we got.

Trigger - allows you to independently define a reaction to a tag with the ability to transfer control to Tasker.

NFC TagWriter - a proprietary application from the leading tag manufacturer NXP Semiconductors.

NFC TagInfo - a tag reader that allows you to get the most complete information about the tag and the data written to it.

The three applications we will be using are: There are no tools for changing the tags themselves or the behavior of the smartphone in response to their detection in Android, so we will have to acquire additional software. Depending on the type of data recorded in the tag, a smartphone can display this data on the screen (type "text" or not supported), open a web page (type URI), launch an application (special type :pkg, supported only in Android), open the dialer with the specified number (URI type "tel://"), and perform some other actions. All you can do is just bring the tag to your smartphone so that the latter can read it.

WOL WAKE ON LAN WANANDROID APP ANDROID

The same Android does not offer any means to work with them at all. Without additional software, mobile operating systems have only limited support for "communicating" with tags. But even if it's not, the tag can still be used as an action trigger by simply setting the smartphone's response to the tag's unique ID.

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Often, part of the memory in them remains free for writing, so any information can be placed there.

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.Īs a tag, it is quite possible to use tokens and subway cards for multiple trips. Another option is Samsung's TecTile tags, with an even higher price tag, but with more memory (716 bytes). You can also get branded tags from Sony (SmartTags), but apart from the appearance and price, which will be three to five times higher, they are no different. The cheapest tags in the face of Mifire Ultralight C with 137 bytes of memory will cost about five dollars for ten pieces. Where to get tags? As I said, the easiest option is to just order them from China (dx.com,, ). Near field communication (NFC) (translated as: “near field communication”) is a new short-range wireless high-frequency communication technology. We use NFC for automation How to make the phone support nfc What is the NFC module in the phone and how contactless payment works.