RFID_Acces_LED

/*PIN SDA : D2
 *PIN SCK : D5
 *PIN MOSI: D7
 *PIN MISO: D6
 *PIN GND : GND
 *PIN RST : D1
 *PIN 3V  : 3V
 *KAKI PANJANG LED GREEN : D0
 *KAKI PANJANG LED RED : D4
 *KAKI PENDEK SEMUA LED : GND
 */


#include <SPI.h>
#include <MFRC522.h>
#define RST_PIN D1
#define SDA_PIN D2
#define LED_GREEN D0
#define LED_RED D4

MFRC522 MFRC522(SDA_PIN, RST_PIN);

void setup() {
  Serial.begin(9600);
  SPI.begin();
  MFRC522.PCD_Init();
  Serial.println("Put your card to the reader...");
  pinMode(LED_GREEN, OUTPUT);
  digitalWrite(LED_GREEN, LOW);
  pinMode(LED_RED, OUTPUT);
  digitalWrite(LED_RED, LOW);

}

void loop() {
  if(!MFRC522.PICC_IsNewCardPresent()){
    return;
  }
  if(!MFRC522.PICC_ReadCardSerial()){
    return;
  }

  Serial.print("UID tag :");
  String content = "";
  byte letter;

  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));
  }

  Serial.println();
  Serial.print("Pesan : ");
  content.toUpperCase();
  Serial.println (content);

  if(content.substring(1) == "-"){ // Ganti dengan UID In Hex salah satu tag yang antum punya
    Serial.println("Kartu cocok");
    Serial.println();
    digitalWrite(LED_GREEN, HIGH);
    delay(2000);
    digitalWrite(LED_GREEN, LOW);
  }

  else{
    Serial.println("Kartu Tidak cocok");
    Serial.println();
    digitalWrite(LED_RED, HIGH);
    delay(2000);
    digitalWrite(LED_RED, LOW);
  }

}