#define BLYNK_TEMPLATE_ID "TMPL6lu51z5v5"
#define BLYNK_TEMPLATE_NAME "mainan"
#define BLYNK_AUTH_TOKEN "U1CcWm-YVlhEzXa7JngkAuH-4umULYMj"

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

char ssid[] = "Wokwi-GUEST";
char pass[] = "";
char auth[] = "U1CcWm-YVlhEzXa7JngkAuH-4umULYMj";

const int ledPin = 2;
const int buzzerPin = 4;
const int trigPin = 17;
const int echoPin = 5;

bool programRunning = false;

LiquidCrystal lcd(12, 14, 27, 26, 25, 33);  // Adjust pin numbers based on your LCD wiring

void setup() {
  Serial.begin(115200);

  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
    Serial.print(".");
  }
  Serial.println();

  Blynk.begin(auth, ssid, pass);

  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);

  lcd.begin(16, 2);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Distance:");
}

void loop() {
  Blynk.run();

  if (programRunning) {
    long duration, distance;
    digitalWrite(trigPin, LOW);
    delayMicroseconds(2);
    digitalWrite(trigPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(trigPin, LOW);
    duration = pulseIn(echoPin, HIGH);
    distance = duration * 0.034 / 2;

    Blynk.virtualWrite(V2, distance);
    Blynk.virtualWrite(V3, digitalRead(buzzerPin));
    Blynk.virtualWrite(V4, digitalRead(ledPin));

    lcd.setCursor(0, 1);
    lcd.print("                ");  // Clear the previous distance value
    lcd.setCursor(0, 1);
    lcd.print("Dist: " + String(distance) + " cm");

    if (distance < 150) {
      digitalWrite(ledPin, HIGH);
      tone(buzzerPin, 1000);
      lcd.setCursor(0, 0);
      lcd.print("PENCEROBOH!!!     ");
    } else {
      digitalWrite(ledPin, LOW);
      noTone(buzzerPin);
      lcd.setCursor(0, 0);
      lcd.print("SELAMAT            ");
    }

    delay(500);
  }
}

BLYNK_WRITE(V1) {
  int switchState = param.asInt();
  if (switchState == 1) {
    // Start the program
    programRunning = true;
  } else {
    // Stop the program
    programRunning = false;
    // Turn off LED, Buzzer, and clear LCD when the program stops
    digitalWrite(ledPin, LOW);
    noTone(buzzerPin);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Distance:");
  }
}