// This simulation is to add intermittent control to an Auto Return wiper motor for a tractor.
// When the Slide Potentiometer is all the way to the left, wiper motor is in continuous mode.
// The further you move the slide Potentiometer to the right, the longer the Intermittent Delay is (20 Seconds Max)
// The blue LED is to simulate when the Auto Return Wiper Motor would powered by a 12V source

int sensorPin = A1; // Delay Slider Potentiometer
int motorPin = 2; // To Wiper Relay
int interval = 0;

void setup() {
  // declare the ledPin as an OUTPUT:
  pinMode(motorPin, OUTPUT);
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(9600);
}

void loop() {

  int sensorValue = analogRead(A1);
  if (sensorValue <= 4) { // Determine the minimum potentiometer position before intemittent wiper is activated
    interval = 0;
  }

  else interval = (2000 + (sensorValue * 18)); // 2000 is the time for a complete wipe, sensorValue determine the maximum intermittent in seconds

  static unsigned long lastTime = 0;
  if (millis() - lastTime >= interval)
  {
    lastTime = millis();
    //Serial.println(interval);
    //Serial.println(sensorValue);
    digitalWrite(motorPin, LOW);
    digitalWrite(LED_BUILTIN, HIGH);
    delay (400); // Pulse the motor to activate auto-return
    digitalWrite(motorPin, HIGH);
    digitalWrite(LED_BUILTIN, LOW);
  }

}