Alarm­an­la­ge Hall-Sensor

int LED = 7;
int MAGNETSENSOR = 6;
int LAUTSPRECHER = 8;
 
void setup() 
{
  pinMode(LED, OUTPUT);
  pinMode(MAGNETSENSOR, INPUT);
}

void loop() 
{
  digitalWrite(LED, LOW);
  int SensorLesen = digitalRead(MAGNETSENSOR);
  if (SensorLesen == LOW) 
  {
    digitalWrite(LED, HIGH);
    tone(LAUTSPRECHER, 1000);
  }
  else 
  {
    digitalWrite(LED, LOW);
    noTone(LAUTSPRECHER);
  }
}