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

LiquidCrystal_I2C lcd(0x27,20,4); 



#define BLYNK_TEMPLATE_ID "TMPL6G6VQwb6s"
#define BLYNK_TEMPLATE_NAME "TempHumid"
#define BLYNK_AUTH_TOKEN "XrdQw9QpIQLLgpKrvT8AdkPAMqErOyz8"
#define DHTPIN 5     
#define DHTTYPE DHT22   
DHT dht (DHTPIN, DHTTYPE);



char ssid[] = "Wokwi-GUEST";
char pass[] = "";
BlynkTimer timer;

int led1 = 4; 
int led2 = 18;

int relay = 27;

void setup()
{
  
  
   lcd.init();                      
  
  lcd.backlight();

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(relay, OUTPUT);
  dht.begin();

  
  timer.setInterval(3000L, sendSensor);
}

void loop()
{
  Blynk.run();
  timer.run();
  sendSensor();
}


void sendSensor()
{
  float humid = dht.readHumidity();
  float temp = dht.readTemperature(); 

  if (isnan(humid) || isnan(temp)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
  lcd.setCursor(0,0);
  lcd.print(F("Humidity: "));
  lcd.setCursor(0,1);
  lcd.print(humid);
  lcd.print("% ");

  lcd.setCursor(0,2);
  lcd.print(F("Temperature: "));
  lcd.setCursor(0,3);
  lcd.print(temp);
  lcd.print("C");
 
  Blynk.virtualWrite(V5, humid); 
  Blynk.virtualWrite(V7, temp); 

  if(temp >= 25 && humid < 25){
    
    digitalWrite(relay,1);
  }
  else{
    digitalWrite(relay,0);
  }

}