// Interrupt-Steuerung  - Teil 1

byte interruptPin_1 = 2,  // für Taster
     interruptPin_2 = 3;  // für PIR-Sensor


void setup() {
  Serial.begin(115200);
  Serial.println("Start");
  
  pinMode(interruptPin_1, INPUT);
  pinMode(interruptPin_1, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(interruptPin_1), change_13, RISING);

  pinMode(interruptPin_2, INPUT);
  pinMode(interruptPin_2, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(interruptPin_2), change_13, RISING);
  pinMode(13,OUTPUT);
}

void loop() {
  // digitalWrite(13,! digitalRead(13));  delay(5000);
}

void  change_13() {
  digitalWrite(13,! digitalRead(13));
  Serial.print(". ");
}