Description
An RFID (Radio Frequency Identification) module and tag system is designed for wireless data transfer and identification using radio waves. The module, such as the popular MFRC522 or RC522, communicates with RFID tags or cards to read/write data within a short range (typically up to 10cm). Tags contain unique IDs, often embedded in a chip, and can be passive (no battery) or active (battery-powered). This system is widely used in access control, inventory tracking, attendance systems, and contactless payment solutions due to its simplicity, reliability, and cost-effectiveness.
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