![]() ![]() ![]() The tag draws power from it, energizing the circuits in the tag. When radio waves from the reader are encountered by a passive rfid tag, the coiled antenna within the tag forms a magnetic field. Radio waves are used to transfer data from the tag to a reader.Ī passive tag is an RFID tag that does not contain a battery, the power is supplied by the reader. This is the advantage over Bar-code.Ī RFID reader is a device used to gather information from an RFID tag, which is used to track individual objects. A tag can be read from up to several feet away and does not need to be within direct line-of-sight of the reader to be tracked. Radio- Frequency Identification ( RFID) is the use of radio waves to read and capture information stored on a tag attached to an object. Before we move to actual code lets know more about RF ID. This library read and write different types of Radio-Frequency IDentification (RFID) cards on your Arduino or NodeMCU using a RC522 based reader connected via the Serial Peripheral Interface (SPI) interface. ![]() In this tutorial we will learn How to interface Arduino UNO with RC522 RF ID Reader using Arduino library for MFRC522 and other RFID RC522 based modules. ![]()
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