* RST/Reset   RST          9            
 * SPI SS      SDA(SS)      10            
 * SPI MOSI    MOSI         11  
 * SPI MISO    MISO         12
 * SPI SCK     SCK          13
 
 

#include <SPI.h>
#include <MFRC522.h>

#define RST_PIN         9          // Configurable, see typical pin layout above
#define SS_PIN          10         // Configurable, see typical pin layout above

MFRC522 mfrc522(SS_PIN, RST_PIN);  // Create MFRC522 instance
byte accessUID[4] = {0x23, 0xC5, 0x7D, 0x90};

int LedR = 3;
int LedG = 4;


void setup() {

  pinMode(LedR, OUTPUT);
  pinMode(LedG, OUTPUT);

  SPI.begin();      // Init SPI bus
  mfrc522.PCD_Init();   // Init MFRC522
}

void loop() {
  // Reset the loop if no new card present on the sensor/reader. This saves the entire process when idle.
  if ( ! mfrc522.PICC_IsNewCardPresent()) {
    
  }

  // Select one of the cards
  if ( ! mfrc522.PICC_ReadCardSerial()) {
    return;
  }

  if(mfrc522.uid.uidByte [0] == accessUID [0] && mfrc522.uid.uidByte [1] == accessUID [1] && mfrc522.uid.uidByte [2] == accessUID [2] && mfrc522.uid.uidByte [3] == accessUID [3]) {
  digitalWrite(LedG, HIGH);
  delay(1000);  
  digitalWrite(LedG, LOW);

}
//demande au lecteur de poutsuivre l'analyse
mfrc522.PICC_HaltA();
}