#define S1x 2 // Hautschalter
#define FWx 3 // Flammenwächter
#define PT A0 // Temperatur
#define P1 8
#define P2 9
#define P3 10
#define P4 11
#define P5 12
#define PU 13 // Summer

bool S1,FW,Flag = 0;
double Temp = 0;
unsigned long startwert;

void setup() {
Serial.begin(9600);

pinMode(S1x, INPUT_PULLUP);
pinMode(FWx, INPUT_PULLUP);
pinMode(P1, OUTPUT);
pinMode(P2, OUTPUT);
pinMode(P3, OUTPUT);
pinMode(P4, OUTPUT);
pinMode(P5, OUTPUT);
pinMode(PU, OUTPUT);
}

void loop() {

S1 = !digitalRead(S1x);
FW = !digitalRead(FWx);

if (S1 and FW){ 
  if(Flag==0){
    startwert = millis();
    Flag = 1;
  }
  if (millis()-startwert>=3000){
  Temp = (analogRead(PT)*500.0/1023.0);
  }
}

if (Temp<=180 or Temp>=270)
  digitalWrite(PU, HIGH); else digitalWrite(PU, LOW);

if (Temp>=180)
  digitalWrite(P1, HIGH); else digitalWrite(P1, LOW);

if (Temp>=198)
  digitalWrite(P2, HIGH); else digitalWrite(P2, LOW);

if (Temp>=216)
  digitalWrite(P3, HIGH); else digitalWrite(P3, LOW);

if (Temp>=234)
  digitalWrite(P4, HIGH); else digitalWrite(P4, LOW);

if (Temp>=252)
  digitalWrite(P5, HIGH); else digitalWrite(P5, LOW);

if (!S1 or !FW){
Flag = 0;
Temp = 0;
}

Serial.println(digitalRead(PU));
Serial.println(Temp);
delay(200);
}