//RFID-Bibiothk (mfrc522)
#include <MFRC522.h>
#include <SPI.h>
#include<avr/wdt.h>

const int RoteLED = 3;
const int GrueneLED = 2;
const int Ton = 4;
const int Heligkeit=A0;
const int Florlampe= 5;

// RFID-Empfänger benennen
MFRC522 mfrc522(10, 9);   //SS_PIN,RST_PIN

void setup() {
  Serial.begin(9600);   // Initiate a serial communication
  SPI.begin();      // Initiate  SPI bus
  mfrc522.PCD_Init();   // Initiate MFRC522
  
  pinMode(RoteLED, OUTPUT);
  digitalWrite(RoteLED,LOW);
  pinMode(GrueneLED, OUTPUT);
  digitalWrite(GrueneLED,LOW);
  pinMode(Ton, OUTPUT);
  pinMode(Florlampe, OUTPUT);
  pinMode(Heligkeit, INPUT);
  wdt_disable(); //Disable WDT
  wdt_enable(WDTO_2S); //Enable WDT with a timeout of 2 seconds
}

void loop() {
  delay(200);

  wdt_reset(); //Zurücksetzen
  if ( ! mfrc522.PICC_IsNewCardPresent()){
    return;
  }
  if ( ! mfrc522.PICC_ReadCardSerial()){
    return;
  }
  String content= "";
  for (byte i = 0; i < mfrc522.uid.size; i++){     
     content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
     content.concat(String(mfrc522.uid.uidByte[i], HEX));
     
  }
  
  Serial.println(content);
  if (content.substring(1) == "b3 46 3f ac"){  // Karte Genehmigen 
    //
     int value = analogRead(Heligkeit);
     Serial.println(value);
     if(value <80){ digitalWrite(Florlampe, HIGH);  }
    //


    digitalWrite(GrueneLED, HIGH); 
    digitalWrite(Ton, HIGH); 
    delay(200);
    digitalWrite(Ton, LOW); 
    delay(1300); 
    digitalWrite(GrueneLED, LOW);
    delay(1500); 
    digitalWrite(Florlampe, LOW);
  }  
  else{      // Karte sperren
    digitalWrite(RoteLED, HIGH);
    digitalWrite(Ton, HIGH);   
    delay(1000);
    digitalWrite(RoteLED, LOW);  
    digitalWrite(Ton, LOW);   
  }
}