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. The RC-522 RFID Module is a reliable and efficient solution for wireless identification and access control in robotics and embedded systems. Operating at 13.56 MHz, it uses radio frequency communication to read and write data from compatible RFID tags and cards. Ideal for security systems, attendance tracking, smart locks, and automation projects, this module supports SPI, I2C, and UART communication. With low power consumption and easy integration with Arduino and Raspberry Pi, it’s perfect for hobbyists, students, and developers building intelligent RFID-based systems.
