Arduino RFID Scanner with LED

SOURCE CODE:

#include "SPI.h" #include "MFRC522.h"

#define SS_PIN 10 #define RST_PIN 9 #define LED_PIN 8

MFRC522 rfid(SS_PIN, RST_PIN);

MFRC522::MIFARE_Key key;

void setup() { Serial.begin(9600); SPI.begin(); rfid.PCD_Init(); pinMode(LED_PIN, OUTPUT); }

void loop() { if (!rfid.PICC_IsNewCardPresent() || !rfid.PICC_ReadCardSerial()) return;

// Serial.print(F("PICC type: ")); MFRC522::PICC_Type piccType = rfid.PICC_GetType(rfid.uid.sak); // Serial.println(rfid.PICC_GetTypeName(piccType));

// Check is the PICC of Classic MIFARE type if (piccType != MFRC522::PICC_TYPE_MIFARE_MINI && piccType != MFRC522::PICC_TYPE_MIFARE_1K && piccType != MFRC522::PICC_TYPE_MIFARE_4K) { Serial.println(F("Your tag is not of type MIFARE Classic.")); return; }

String strID = ""; for (byte i = 0; i < 4; i++) { strID += (rfid.uid.uidByte[i] < 0x10 ? "0" : "") + String(rfid.uid.uidByte[i], HEX) + (i!=3 ? ":" : ""); } strID.toUpperCase();

Serial.print("Tap card key: "); Serial.println(strID);

if (strID.indexOf("20:6B:18:83") >= 0) { digitalWrite(LED_PIN, HIGH); } else { digitalWrite(LED_PIN, LOW); }

rfid.PICC_HaltA(); rfid.PCD_StopCrypto1(); }