RFID connectivity Technologies in IoT

Introduction

• RFID is an acronym for "radio-frequency identification"
• Data digitally encoded in RFID tags, which can be read by a reader.
• Somewhat similar to barcodes.
• Data read from tags are stored in a database by the reader.
• As compared to traditional barcodes QR  codes, RFID tag data can be read outside the line-of-sight.

RFID Features

• RFID tag consists of an integrated circuit and an antenna.
• The tag is covered by a protective material which also acts as a shield against various environment effects.
• The tag may be passive or active.
• Passive RFID tags are the most widely used.
• Passive tags have to be powered by a reader inductively before they can transmit information, whereas active tags have their own power supply.

Working Principle :

• Derived from Automatic identification and Data Capture (AIDC) technology.
• AIDC performs object identification, object data collection and mapping of the collected data to computer systems with little or no human intervention.
• AIDC uses radio waves to perform AIDC functions.
• The main components of an RFID system include an RFID tag or smart label, an RFID reader, and an antenna. 

Application :

• Inventory management
• Asset tracking
• Personal tracking
• Controlling access to restricted areas
• ID badging
• Supply chain management
• Counterfeit prevention (e.g. in the pharmaceutical industry)