// Define the pins for the A4988 stepper motor driver
#define STEP_PIN 16 // Pin connected to STEP on A4988
#define DIR_PIN 17  // Pin connected to DIR on A4988

// Define the pin for the relay module that controls the LED
#define RELAY_PIN 18 // Pin connected to IN on the relay module

// Set the number of steps per revolution for your motor (usually 200 for NEMA 17)
const int stepsPerRevolution = 50;

void setup() {
  // Set the stepper motor pins as OUTPUTs
  pinMode(STEP_PIN, OUTPUT);
  pinMode(DIR_PIN, OUTPUT);

  // Set the relay pin as an OUTPUT
  pinMode(RELAY_PIN, OUTPUT);
  
  // Set the initial state of the relay to OFF
  digitalWrite(RELAY_PIN, LOW); 
}

void loop() {
  // --- Step 1: Rotate Motor Clockwise ---
  
  // Set the direction to clockwise
  digitalWrite(DIR_PIN, HIGH);

  // Spin the motor for one full revolution
  for (int i = 0; i < stepsPerRevolution; i++) {
    // Generate one pulse
    digitalWrite(STEP_PIN, HIGH);
    delayMicroseconds(500); // Adjust this value to control motor speed
    digitalWrite(STEP_PIN, LOW);
    delayMicroseconds(500); // Adjust this value to control motor speed
  }

  delay(3000); // Wait for 1 second before the next action

  // --- Step 2: Blink the LED ---
  
  // Turn the relay (and LED) ON
  digitalWrite(RELAY_PIN, HIGH);
  delay(1000); // Keep the LED on for 1 second
  
  // Turn the relay (and LED) OFF
  digitalWrite(RELAY_PIN, LOW);
  delay(1000); // Wait for 1 second


  // --- Step 3: Rotate Motor Counter-Clockwise ---

  // Set the direction to counter-clockwise
  digitalWrite(DIR_PIN, LOW);

  // Spin the motor for one full revolution
  for (int i = 0; i < stepsPerRevolution; i++) {
    // Generate one pulse
    digitalWrite(STEP_PIN, HIGH);
    delayMicroseconds(500);
    digitalWrite(STEP_PIN, LOW);
    delayMicroseconds(500);
  }

  delay(1000); // Wait for 1 second before the next action
  
  // --- Step 4: Blink the LED Again ---

  // Turn the relay (and LED) ON
  digitalWrite(RELAY_PIN, HIGH);
  delay(1000); // Keep the LED on for 1 second

  // Turn the relay (and LED) OFF
  digitalWrite(RELAY_PIN, LOW);
  delay(1000); // Wait for 1 second before the loop repeats
}