#define BLYNK_TEMPLATE_ID "TMPL6uAP8ts9n"
#define BLYNK_TEMPLATE_NAME "Smoke Detection"
#define BLYNK_AUTH_TOKEN "GOVyc9u85uASCe-dKVrnxnUmo2ulO26g"
#define BLYNK_PRINT Serial

#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

// Blynk Authentication
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST"; // Hotspot name
char pass[] = ""; // Hotspot password

const int smokeSensorPin = 34;  // Analog pin for the smoke sensor
LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address and LCD size

void setup() {
    Serial.begin(115200);  
    delay(100); 
    pinMode(smokeSensorPin, INPUT);
  
    Blynk.begin(auth, ssid, pass, "blynk.cloud", 80);
    lcd.init();
    lcd.backlight();
    lcd.setCursor(0, 0);
    lcd.print("Smoke Detector");
    delay(2000);
    lcd.clear();
}

void loop() {
    int smokeLevel = analogRead(smokeSensorPin);
    Blynk.virtualWrite(V4, smokeLevel);  // Send smoke data to Virtual Pin V4
    Serial.print("Smoke Level: ");
    Serial.println(smokeLevel);

    int threshold = 500;  // Adjust threshold as needed

    lcd.setCursor(0, 0);
    lcd.print("Smoke Level:    ");
    lcd.setCursor(12, 0);
    lcd.print(smokeLevel); // Print the smoke level value at a specific position
    
    lcd.setCursor(0, 1);
    if (smokeLevel > threshold) {
        Serial.println("Smoke Detected!");
        lcd.print("Smoke Detected! ");
    } else {
        lcd.print("Safe           ");
    }

    delay(1000);  // Delay to avoid too rapid readings

    Blynk.run();
}