/*
    Dieses Programm verwendet
    - den Taster S1 am Pin 2 und
    - die LED am Pin 13.
*/

#define TASTER 2
#define LED 13
byte by_temp;

void setup() {
  pinMode(TASTER, INPUT); // Taster S1 (gedrückt = 1)
  pinMode(LED, OUTPUT); // LED PD6 (low active)
  Serial.begin(9600);
}

void loop() {
  by_temp = digitalRead(TASTER); // Taster S1 (gedrückt = 0)
  Serial.println(by_temp);
  digitalWrite(LED, by_temp); // LED PD6 (low active)
}