// Pins für den Drehgeber

constexpr uint8_t adcPin = A0; // Input

void readADC() {
  static int previousADC = 0;
  int currentADC = analogRead(adcPin);
  Serial.print(currentADC);
  Serial.print('\t');
  Serial.print(previousADC);
  Serial.print('\t');
  if (currentADC < previousADC) {
    Serial.println("kleiner");
  }
  else if (currentADC > previousADC) {
    Serial.println("größer");
  }
  else {
    Serial.println("gleich");
  }
  previousADC = currentADC;
}

void setup() {
  Serial.begin(115200);
}

void loop() {
   readADC();
   delay(1000); // dirty delay to slow down for demo mode only
}