#include <BlynkSimpleEsp32.h>
#include <AccelStepper.h>

// Blynk authentication token
char auth[] = "YOUR_AUTH_TOKEN";

// Define the number of steps per revolution for your stepper motor
const int stepsPerRevolution = 200;

// Initialize the stepper motor object with the number of steps and the pin numbers
Stepper stepper(stepsPerRevolution, 8, 9, 10, 11);

// Flag to indicate if the motor is currently running
bool isMotorRunning = false;

void setup() {
  // Initialize the serial communication for debugging
  Serial.begin(9600);

  // Connect to the Blynk server
  Blynk.begin(auth);
  
  // Set the motor speed
  stepper.setSpeed(60);  // Set the initial speed in RPM
}

void loop() {
  // Run the Blynk background tasks
  Blynk.run();

  // If the motor is running and the Blynk app is disconnected, stop the motor
  if (isMotorRunning && !Blynk.connected()) {
    stopMotor();
  }
}

// Function to start the motor
void startMotor() {
  Serial.println("Starting motor");
  stepper.step(stepsPerRevolution);
  isMotorRunning = true;
}

// Function to stop the motor
void stopMotor() {
  Serial.println("Stopping motor");
  stepper.step(-stepsPerRevolution);
  isMotorRunning = false;
}

// Blynk button callback function
BLYNK_WRITE(V1) {
  int buttonState = param.asInt();

  // If the button is pressed, start the motor
  if (buttonState == HIGH) {
    startMotor();
  }
  // If the button is released, stop the motor
  else {
    stopMotor();
  }
}