// Show UID on serial monitor Serial.print("UID tag :"); String content = ""; for (byte i = 0; i < mfrc522.uid.size; i++) Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "); Serial.print(mfrc522.uid.uidByte[i], HEX); content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ")); content.concat(String(mfrc522.uid.uidByte[i], HEX));
Because the official RC522 library is so brittle, professional developers use a clever workaround. Instead of simulating the RFID chip, they simulate the and the Host MCU . rc522 proteus library
To add RFID capabilities, you must manually import external library files (typically .LIB and .IDX ). // Show UID on serial monitor Serial
: Move the downloaded .LIB and .IDX files into the LIBRARY folder. If there is a .HEX or .MD5 file, place it in the MODELS folder. String content = ""