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

// Blynk Auth Token
char auth[] = "OlGH6ce8zi3JZYNaQivrT0jMDAptAkd1";

// WiFi credentials
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// LCD Display
LiquidCrystal_I2C lcd(0x27, 16, 2);

// DHT22 Sensor
#define DHTPIN 4
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// Blynk Virtual Pins
#define VIRTUAL_TEMPERATURE V0
#define VIRTUAL_HUMIDITY V1

void setup() {
  // Initialize LCD Display
  lcd.begin(16, 2);
  lcd.print("Temperature:");

  // Initialize DHT22 Sensor
  dht.begin();

  // Setup WiFi connection
  Blynk.begin(auth, ssid, pass);
}

void loop() {
  Blynk.run();

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

  // Print temperature and humidity to LCD display
  lcd.setCursor(0, 1);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print("C  Humidity: ");
  lcd.print(humidity);
  lcd.print("%");

  // Send temperature and humidity to Blynk
  Blynk.virtualWrite(VIRTUAL_TEMPERATURE, temperature);
  Blynk.virtualWrite(VIRTUAL_HUMIDITY, humidity);

  delay(2000); // Delay for stability
}