// Define the pins for controlling the stepper motor
const int stepPin = 2;  // Step pin
const int dirPin = 3;   // Direction pin

// Define the ratio for your motor driver
const float ratio = 16.0;  // 16:1 reduction ratio

// Define a variable to store the current position of the motor
int currentPosition = 0;
// Define a variable to store the target position
int targetPosition = 0;

void setup() {
  // Initialize serial communication
  Serial.begin(9600);
  
  // Set the motor control pins as outputs
  pinMode(stepPin, OUTPUT);
  pinMode(dirPin, OUTPUT);
  Serial.println("Start");
}

void loop() {
  // Check if there's data available on the serial port
  if (Serial.available() > 0) {
    // Read the available data
    int target = Serial.parseInt();
    // Check if the data is valid
    if (Serial.read() == '\n') {
      // Store the target position
      targetPosition = target;
      // Calculate the distance between positions and move the motor accordingly
      int distanceToMove = targetPosition - currentPosition;
      if (distanceToMove != 0) {
        moveStepper(distanceToMove);
        // Update the current position
        currentPosition = targetPosition;
      }
    }
  }
}

// Function to move the stepper motor
void moveStepper(int steps) {
  // Set the direction of movement based on the sign of steps
  if (steps > 0) {
    digitalWrite(dirPin, HIGH);  // Clockwise direction
  } else {
    digitalWrite(dirPin, LOW);   // Counter-clockwise direction
  }
  
  // Take the absolute value of steps
  steps = abs(steps);
  
  // Calculate the actual number of steps to move based on the ratio
  int actualSteps = steps * ratio;
  
  // Pulse the step pin to move the motor
  for (int i = 0; i < actualSteps; i++) {
    digitalWrite(stepPin, HIGH);
    delayMicroseconds(500);  // Adjust this delay as needed for your motor
    digitalWrite(stepPin, LOW);
    delayMicroseconds(500);  // Adjust this delay as needed for your motor
  }
}