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NFC technology

NFC technology

NFC technology

2019-09-26 16:00:35

What is NFC technology?
 
NFC is a significate technology for wireless radio communication, It's a wireless radio communications standard same as Bluetooth and WiFi.NFC (Near field communication) is able to read and program in close proximity to communicate no need the internet connection. 
 
 NFC's closest relative is actually RFID (radio frequency identification).
NFC is a lot like RFID, only it's a more up-close-and-personal type of wireless. Whereas RFID can be used from a distance, NFC readers work at a maximum range of about 4 inches (10 centimeters). 
So NFC tags usually use for digitized information. For example, a smart NFC tag inlay could be embedded into a political flyer. Tap the NFC tag, and you're directed to a Web site touting a candidate's credentials. At the same time, you also instantly receive a snappy biography in the form of a text file and image.
Or, at your favorite restaurants, you can touch your phone to an NFC tagged menu and voila -- you have the entire menu on your phone, along with nutritional information and mouth-watering descriptions of the ingredients in your favorite dishes.
The NFC tags are formatted to be used with NFC systems. And they're small and cheap enough to integrate into all sorts of products: posters promoting circus tour dates, ski lift passes, stickers, business cards, prescription bottles and even ruggedized labels meant for outdoor use.NFC tags are passive, meaning they don't have any power source. Instead, they literally draw power from the device that reads them, thanks to magnetic induction. When a reader gets close enough to a tag, it energizes it and transfers data from that tag. 
 
Unlike RFID technology, NFC readers aren't always specialized devices. As a matter of fact, NFC chips will be incorporated right into your smartphone's circuitry. With the widespread reach of NFC phones, NFC tags could one day become as commonplace as bar codes. If your smartphone without NFC chip inside, you can use a smartphone enable NFC reader.
There are four flavors of NFC tags, types 1 through type 4, all featuring different capacities and data transfer speeds. Type 1 tags typically store 96 bytes and work at 106 Kbps (kilobits per second); Type 4, the biggest and fastest, store up to 32 KB and work at speeds of up to 424 Kbps.
Anyone can buy blank NFC tags and then write customized data to them. Type 1 and Type 2 tags can be written to multiple times. These tags can also be permanently locked, or encrypted so that no one can manipulate the data. Type 3 and Type 4 tags can only be written to once, and they lack the security of types 1 and 2.
Tags with higher memory and larger antennas are bigger in physical size. Generally, tag size ranges from just a centimeter or two to a few inches.
Memory capacity and speed dictate cost, which is a critical consideration for companies that want to spread information far and wide through smart posters or flyers. 
 
What are NFC tags?
NFC (near field communication)technology is a wireless technology which allows for the transfer of data such as text or numbers between two NFC enabled devices. NFC tags, for example NFC stickers, contain small microchips with little antennas which can store a small amount of information for transfer to another NFC device, such as a NFC mobile phone.
 
An NFC tag itself consists of three basic components: an NFC chip, an antenna and something to keep it together. The NFC chip is a tiny microchip which contains a small amount of memory and the technology to allow it to communicate. The antenna is a coil or loop of wire which, in the case of a sticker, will be an etching a fraction of a millimeter thick. The substrate holds it together and would typically be a thin sheet of plastic. If the tag is a sticker, it will have adhesive on one side to allow it to be attached.
 
 NFC Tags in terms of NFC stickers, NFC labels, NFC inlays tag . Other NFC items such as NFC wristbands, NFC keyfobs or even NFC drinks mats we refer to as NFC products. While the form of the product will vary, inside there will be the same basic NFC tag with a chip, antenna and something to keep it together.
What information can you store?
Adding data to an NFC tag is called encoding or programming. There’s a wide variety of data types you can encode onto an NFC tag. For example, you may choose to encode a URL (web address), a telephone number or simply a small ID number. The data is usually stored in a particular way called NDEF (NFC data exchange format) encoding. This universal way of storing NFC information means that almost any NFC enabled device will be able to read and understand the data and what type of data it is.
 
How much information can be stored on an NFC Tag?
The actual amount of data varies depending on the type of NFC chip used. Different tags have different chips and each chip has a specific memory capacity. It’s worth mentioning that the memory capacity of an NFC tag is tiny compared to other memory devices you may be familiar with such as a USB stick or SD card. In fact, most NFC tags can store only about a sentence of text. A typical NTAG210 NFC chip can store only a URL up to 40 characters long. The popular NTAG213 chip NFC tag can store a URL up to around 130 characters.
 
However, this is all that you need. An NFC tag is generally regarded as being a reference to data rather than a data store itself. For example, you wouldn’t store a website on an NFC tag. You would store a URL/web address that would link the tag to a full website on the internet. Similarly, you might store an ID on the tag so that you can tag an asset. That ID would enable you to identify the object and gain more information from the ‘cloud’ or other internet sources. You wouldn’t necessarily store any asset information directly on the tag.

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