// https://wokwi.com/projects/468815327253940225
// built from:
// https://wokwi.com/projects/409915409723559937
// Code from https://www.arduino.cc/en/Tutorial/BuiltInExamples/AnalogReadSerial
// but with some change-detection code 
// Other simulations: https://forum.arduino.cc/t/wokwi-simulations-for-arduino-built-in-examples/1304754

/*
  AnalogReadSerial

  Reads an analog input on pin 0, prints the result to the Serial Monitor.
  Graphical representation is available using Serial Plotter (Tools > Serial Plotter menu).
  Attach the center pin of a potentiometer to pin A0, and the outside pins to +5V and ground.

  This example code is in the public domain.

  https://www.arduino.cc/en/Tutorial/BuiltInExamples/AnalogReadSerial
*/

// the setup routine runs once when you press reset:
void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
}

// the loop routine runs over and over again forever:
void loop() {
  static int lastValue = -1;
  // read the input on analog pin 0:
  int sensorValue = analogRead(A0);
  if(sensorValue != lastValue){
  // print out the value you read:
  Serial.println(sensorValue);
  lastValue = sensorValue;
  }
  delay(1);  // delay in between reads for stability
}