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:
Reader/writer mode, allowing the NFC device to read and/or write passive NFC tags and stickers.
P2P mode, allowing the NFC device to exchange data with other NFC peers; this operation mode is used by Android Beam.
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.
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.
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.
Some sample –
NFC Bubble tag by get smart card –
Share any of your social links just by tapping phones.
NFC Bubble tag is the fastest way to share your social media and contact info! The other person doesn’t need an app or a software to receive your info.
The phone nfc tag helps individuals and organizations combine their physical and digital social worlds smart business card making it easy to share all your socials and any other online presence you may have including payment apps and music playlists.
No App Required to Scan. Easier for others to add your info straight into their contacts and choose the online platforms they’d like to follow to stay connected to you.
LED NFC Tag with Light Built in Once Tap with a NFC Smart Phones The Light Will Turn on
- With light built into the NFC tags. So once Tap with a NFC smart phone, the light will turn on
- Passive LED NFC tags, No need Battery; No need maintanance.
LED NFC Tag with light built in is an special NFC tags, integrated with LED lights inside. No battery Needed! After you Tap this NFC tag or pay with this NFC tag, the LED lights will shine. So, with this NFC tag, you don’t need to worry to pay twice, since you have seen lights shine, you know that you have paid This LED NFC tag is compatible with Most of NFC enabled phones and devices, Samsung Galaxy S7, S6, S5, S4, S3, Nexus 5, and NFC devices.It can be also used as a normal NFC tags, suitable for a URL, text, small contact record or single action phone trigger.