int eingang = A0;
int LED = 10;
int sensorWert = 0;

void setup() {
  pinMode(LED, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  sensorWert = analogRead(eingang);
  Serial.print("Sensorwert = ");
  Serial.println(sensorWert);

  if (sensorWert < 512){
    digitalWrite(LED, HIGH);
  }
  else{
    digitalWrite(LED, LOW);
  }
}