Radio Frequency Identification (RFID) technology is a wireless technology that uses radio waves to identify and track objects. It is commonly used in IoT systems for asset tracking, inventory management, and access control.


        RFID technology consists of a reader, an antenna, and a tag or transponder. The reader sends out a radio frequency signal, which is received by the tag or transponder. The tag or transponder responds with a unique identification number, which is then transmitted back to the reader.
        There are two main types of RFID tags: passive and active. Passive tags do not have their own power source and rely on the energy from the reader's radio frequency signal to power the tag's microchip and transmit the identification number. Active tags, on the other hand, have their own power source, typically a battery, and can transmit their identification number at a greater distance.

RFID Technology has many applications in IoT, including:
  • Inventory management: RFID tags can be attached to items in a warehouse or store, allowing real-time tracking of inventory levels.
  • Asset tracking: RFID tags can be attached to equipment and other assets, allowing real-time tracking of their location and usage.
  • Access control: RFID tags can be used as a form of identification, allowing access to restricted areas or resources.
  • Supply Chain Management: RFID tags can be used to track the movement of goods through the supply chain, providing real-time visibility into inventory and logistics.
        It is a cost-effective solution for tracking and monitoring large numbers of items, and it allows for real-time data collection, which can be integrated with other systems for automation and analysis. However, RFID technology does have some limitations, such as the range of the signal and the potential for interference from other RF devices.