I am making an exercise with 4 different RFID-RC522 (RF reader).
Each RFID sends a hexadecimal number to arduino, when arduino detects if number is the correct one, then turn on a led and a buzzer, if not, another buzzer is on.
Can you help me in this topic? I have not find a RF READER in XOD,maybe can be a new node in the program. Thanks.