// https://wokwi.com/projects/366355145922817025
// for https://forum.arduino.cc/t/loop-count-0-100-and-then-100-0/1133580
// based on 
// by groundfungus in https://forum.arduino.cc/t/a-multifunction-button/1131935/6
// DaveX modified to demonstrate using similar logic on change in an analog signal
// Simulation demo at https://wokwi.com/projects/365991099114946561
// See also https://forum.arduino.cc/t/wokwi-simulations-for-arduino-built-in-examples/1304754/14?u=davex

const byte potentiometerPin = A0;    // the pin that the potentiometer is attached to
// switch wired to ground and input

// Variables will change:
int buttonPushCounter = 0;   // counter for the number of zeros detected presses

void setup()
{
  // initialize the button pin as a input, enable the internal pullup resistor:
  pinMode(potentiometerPin, INPUT);

  // initialize serial communication:
  Serial.begin(9600);
  Serial.println("Act analog potentiometer changes with hysteresis");
}

void loop()
{
  static int lastPotentiometerState = 0;     // previous state of the button
  static unsigned long timer = 0;
  unsigned long interval = 50;
  if (millis() - timer >= interval)
  {
    timer = millis();
    // read the potentiometer input pin:
    int potentiometerState = analogRead(potentiometerPin);

    // hysteresis by adjusting sensed value:
    if(abs(potentiometerState - lastPotentiometerState) < 3){
      potentiometerState = lastPotentiometerState;
    }
      
    // compare the buttonState to its previous state
    if (potentiometerState != lastPotentiometerState)
    {
      // On potentiometer change:
      Serial.print("Pot:");
      Serial.print(potentiometerState);
      Serial.print(' ');
    }
    // save the current state as the last state,
    //for next time through the loop
    lastPotentiometerState = potentiometerState;
  }
}