Two-Pad Module

#define PORT A0
int debounce = 150;
void setup() {
  Serial.begin(9600);
}
void loop() {
  if (analogRead(PORT) > 1000) {
  } else if (readAnalogButton() == 1) {
    Serial.println("S1");
    delay(debounce);
  } else if (readAnalogButton() == 2) {
    Serial.println("S2");
    delay(debounce);
  }
}
int readAnalogButton() {
  int buttons = 2;
  int resolution = 1023;
  float avg = resolution / float(buttons);
  int val = analogRead(PORT);
  if (val > (buttons – 0.5) * avg) {
    return 0;
  }
  for (int i = 0; i < buttons; i++) {
    if (val < round((i + 0.5) * avg)) {
      return i + 1;
    }
  }
  return 0;
}