RC522 module has 8 pins for SPI, I2C, and UART communication. Module requires 3.3V power, not 5V. Only one communication mode can be active at a time
AIDC automates object identification and data collection without human intervention. Technologies include QR codes, barcodes, RFID, biometrics, and smart cards. Data capture involves converting images/sounds into digital files
First edition published January 15, 2013. Covers parameters for air interface communications at 860 MHz to 960 MHz. Contains normative references and technical annexes
RFID uses electromagnetic waves for communication and data transfer. RFID tags can be passive (powered by reader waves) or active (battery powered). RFID system consists of reader and tags (PCD/PICC). Tags can be cards, tags, key forbs, or stickers
RFID/NFC system consists of reader and tag components. RC522 reader supports UID reading, writing, and data transfer. Module operates at 3.3V, Arduino pins produce 5V
RFID uses electromagnetic coupling to uniquely identify objects and people. System consists of scanning antenna, transceiver, and transponder. Readers can be fixed or mobile, activating tags using radio waves. Tags can be active (battery-powered) or passive (reader-powered)