#define BLYNK_TEMPLATE_ID "TMPL6WcgzySEw"
#define BLYNK_TEMPLATE_NAME "Project UAS"
#define BLYNK_AUTH_TOKEN "3EGVpIkdkhKv8GnYI07TGb8zcTZIF6bz"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <ESP32Servo.h>

// Define constants for the ultrasonic sensor and buzzer
#define TRIG_PIN 2
#define ECHO_PIN 15
#define BUZZER_PIN 5  // Added buzzer pin definition

// Constant for the new virtual pin
#define DISTANCE_VIRTUAL_PIN V1

char ssid[] = "Wokwi-GUEST"; // Adjust with your WiFi SSID
char pass[] = ""; // Adjust with your WiFi password

BlynkTimer timer;
Servo jemuran_1;

// Global variable for clothesline control
int ldr, hujan;
bool status = false;
bool previousStatus = false; // New variable to store the previous status

// Variable for parking mode
bool parkingMode = true; // Assume parking mode is active by default

// Variable to store distance data as integer
int currentDistance = 0;

void setupLEDC() {
  ledcSetup(0, 2000, 8);
  ledcAttachPin(BUZZER_PIN, 0);
  pinMode(BUZZER_PIN, OUTPUT);  // Added pin mode for buzzer
}

void checkDistance() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  long duration = pulseIn(ECHO_PIN, HIGH);
  float distance = duration * 0.0343 / 2;

  currentDistance = static_cast<int>(distance); // Convert float to integer

  Blynk.virtualWrite(DISTANCE_VIRTUAL_PIN, currentDistance);
  
  if (parkingMode && currentDistance <= 50) {
    ledcWrite(0, 125); // Activate buzzer
    Blynk.virtualWrite(V4, 255);
    Blynk.virtualWrite(V3, 0);
    Serial.println("The car is close to the wall");
    
    digitalWrite(BUZZER_PIN, HIGH);  // Activate buzzer on pin D5
  } else {
    ledcWrite(0, 0); // Turn off the buzzer
    Blynk.virtualWrite(V3, 255);
    Blynk.virtualWrite(V4, 0);
    Serial.println("The car can still move backward");
    
    digitalWrite(BUZZER_PIN, LOW);  // Deactivate buzzer on pin D5
  }
}

BLYNK_WRITE(V0) {
  int pinValue = param.asInt();
  if (pinValue == 1 && !previousStatus) {
    status = true;
    jemuran_1.write(0); // Buka clothesline
    Serial.println("Clothesline Open");
  } else if (pinValue == 0 && previousStatus) {
    status = false;
    jemuran_1.write(180); // Tutup clothesline
    Serial.println("Clothesline Close");
  }
  previousStatus = status;
}

void setup() {
  Serial.begin(9600);
  setupLEDC();
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);

  jemuran_1.attach(25);
  jemuran_1.write(180);

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);

  timer.setInterval(1000L, checkDistance);
}

void loop() {
  Blynk.run();
  timer.run();

  ldr = map(analogRead(34), 0, 4096, 100, 0);
  hujan = map(analogRead(35), 0, 4096, 0, 100);

  if (status == true) {
    jemuran_1.write(0);
    Serial.println("Clothesline Open");
  } else {
    if (ldr < 30 || hujan > 40) {
      jemuran_1.write(180);
      Serial.println("Clothesline Close");
    }
  }
}