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

// Wi-Fi credentials
char auth[] = "wjxFvIQevcuEhuYSSECQZqhnRxbU7YWl";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// DHT22 sensor pin and type
#define DHT_PIN 2
#define DHT_TYPE DHT22
DHT dht(DHT_PIN, DHT_TYPE);

// LCD display settings
#define LCD_ADDR 0x27
#define LCD_COLS 16
#define LCD_ROWS 2
LiquidCrystal_I2C lcd(LCD_ADDR, LCD_COLS, LCD_ROWS);

// Blynk virtual pin
#define VIRTUAL_PIN_TEMP V1
#define VIRTUAL_PIN_HUMIDITY V2

void setup() {
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);
  dht.begin();
  lcd.begin(LCD_COLS, LCD_ROWS);
}

void loop() {
  Blynk.run();
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Print temperature and humidity on the LCD display
  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 temperature and humidity to Blynk
  Blynk.virtualWrite(VIRTUAL_PIN_TEMP, temperature);
  Blynk.virtualWrite(VIRTUAL_PIN_HUMIDITY, humidity);

  delay(2000); // Delay between readings
}