// For: https://forum.arduino.cc/t/problem-with-nema-17-and-potentiometer/1031505
//
// Formatted the text a little


#define stepPin 6
#define dirPin 3

#define POT A6

int pot;
int prev;
int delta;

int maxim;

int sensorValue = 0;         // the sensor value
int sensorMin = 250;        // minimum sensor value
int sensorMax = 800;           // maximum sensor value

void setup()
{
  // Sets the two pins as Outputs
  pinMode(stepPin, OUTPUT);
  pinMode(dirPin, OUTPUT);

  Serial.begin (9600);
  delay (1000);
}

void loop()
{
  pot = analogRead (POT);

  pot = constrain(pot, sensorMin, sensorMax);
  pot = map(pot, sensorMin, sensorMax, 0, 1000);

  pot = pot / 4 * 4;

  delta = pot - prev;

  prev = pot;

  Serial.println (pot);
//  Serial.print ("ACTUAL: ");

  if (abs(delta) > 1)
  {
    //Serial.println ("VARIACION");
    if (delta >= 0)
    {
      digitalWrite(dirPin, HIGH);
      for (int x = 0; x < abs(delta); x++)
      {
        digitalWrite(stepPin, HIGH);
        delayMicroseconds(150);
        digitalWrite(stepPin, LOW);
        delayMicroseconds(150);
      }
    }
    else if (delta <= 0)
    {
      digitalWrite(dirPin, LOW);
      for (int x = 0; x < abs(delta); x++)
      {
        digitalWrite(stepPin, HIGH);
        delayMicroseconds(150);
        digitalWrite(stepPin, LOW);
        delayMicroseconds(150);
      }
    }
  }
}