*by this command Serial.println(card_ID) just uncomment it, then set the IDs that you scanned to any name you want *that means you don't have to upload another code to scan the card IDs.

A microcontroller-based RFID attendance tracking system that records check-ins and check-outs with personalized greetings, buzzer confirmation, and Excel logging.

Expertise from Forbes Councils members, operated under license. Opinions expressed are those of the author. After barcodes were put into use more than 50 years ago, the technology revolutionized the ...