The Internet of Things (IoT) is a system of interrelated computing devices, mechanical and digital machines, objects, animals or people that are provided with unique identifiers and the ability to transfer data over a network without requiring human-to-human or human-to-computer interaction.
passive tags wait for a RF signal from an RFID reader, RFID reader sends power energy via antenna which converts the energy into an RF wave enough to power on power off RFID passive tag.Once Passive tag is received wave/power within the read covering zone, the RFID tag's internal antenna draws in energy from the RF waves to make transaction btw reader and passive tag.
Two forms of automated data collection: barcodes and RFID systems,there is much hype as to whether RFID will end up taking over the barcode,One data collection method is not essentially better than the other,they do both carry product information however both differ a great amount.
There's some option that allow custom to choose active, semi-active or passive RFID tags which they are making RFID technology more accessible and prominent in our world. These tags are less expensive to produce, and they can be made small enough to fit on almost any product. Active and semi-active RFID tags use an internal batteries to power on power off their circuits.