// Blynk Configuration
#define BLYNK_TEMPLATE_ID "TMPL6VlLLDwVH"  // Replace with your Template ID
#define BLYNK_TEMPLATE_NAME "IOT Programe" // Replace with your Template Name
#define BLYNK_AUTH_TOKEN "pIdMI31_xli7PY9b6V0ux3PnjCI7sKoI"// Replace with your Blynk Auth Token

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "DHT.h"

// WiFi credentials
char ssid[] = "Your_WiFi_SSID";         // Replace with your WiFi SSID
char pass[] = "Your_WiFi_PASSWORD";     // Replace with your WiFi Password

// DHT22 configuration
#define DHTPIN 15       // GPIO pin connected to DHT22 signal
#define DHTTYPE DHT22   // DHT22 sensor type
DHT dht(DHTPIN, DHTTYPE);

// LCD configuration
LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27 for a 16x2 LCD display

// Virtual pins in Blynk
#define TEMP_VPIN V1  // Virtual pin for temperature
#define HUMID_VPIN V2 // Virtual pin for humidity

void setup() {
  // Initialize Serial Monitor
  Serial.begin(115200);
  Serial.println("DHT22 Sensor with LCD and Blynk");

  // Initialize DHT sensor
  dht.begin();

  // Initialize LCD
  lcd.init();
  lcd.backlight();
  lcd.print("Connecting...");

  // Connect to WiFi and Blynk
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);

  lcd.clear();
  lcd.print("Connected!");
  delay(2000);
  lcd.clear();
}

void loop() {
  // Run Blynk
  Blynk.run();

  // Read temperature and humidity from DHT22
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Check if the sensor returns valid data
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Failed to read from DHT sensor!");
    lcd.setCursor(0, 0);
    lcd.print("Sensor Error!");
    delay(2000); // Retry after 2 seconds
    return;
  }

  // Print data to Serial Monitor
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println("°C");

  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.println("%");

  // Display data on the LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print(" C");

  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(humidity);
  lcd.print(" %");

  // Send data to Blynk
  Blynk.virtualWrite(TEMP_VPIN, temperature); // Send temperature to Virtual Pin V1
  Blynk.virtualWrite(HUMID_VPIN, humidity);  // Send humidity to Virtual Pin V2

  // Wait for 2 seconds before reading again
  delay(2000);
}