#include "DHT.h"

DHT dht;
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
void setup()
{
       lcd.begin();
       Serial.begin(9600);
       pinMode(3, OUTPUT);
       pinMode(4, OUTPUT);
       pinMode(5, OUTPUT);
       pinMode(6, OUTPUT);
Serial.println();
Serial.println("Status\tHumidity (%)\tTemperature (C)\t(F)");
lcd.setCursor(0, 1);
lcd.print("FAN :            ");
dht.setup(2); // data pin 2
}

void loop()
{
delay(dht.getMinimumSamplingPeriod());

float humidity = dht.getHumidity();
long temperature = dht.getTemperature();

Serial.print(dht.getStatusString());
Serial.print("\tHumidity :");
Serial.print(humidity, 1);
Serial.print("\t\tTemp C:");
Serial.print(temperature, 1);
Serial.print("\t\tTemp F:");
Serial.println(dht.toFahrenheit(temperature), 1);
lcd.setCursor(0, 0);
lcd.print("Temperature");
lcd.setCursor(12, 0);
lcd.print(temperature);
lcd.setCursor(14, 0);
lcd.print(" C");
if (temperature >=25&& temperature <28 )

      {
       
      digitalWrite(3, LOW);
      digitalWrite(4, HIGH);
      digitalWrite(5, HIGH);
      lcd.setCursor(0, 1);
      lcd.print("FAN : 1          ");
       
      }
       if (temperature >=28&& temperature <31)
       {
        digitalWrite(4, LOW);
        digitalWrite(3, LOW);
        digitalWrite(5, HIGH);
        lcd.setCursor(0, 1);
        lcd.print("FAN : 2        ");
      }
      
      if (temperature >=31&& temperature <34)
       {
        digitalWrite(5, LOW);
        digitalWrite(3, LOW);
        digitalWrite(4, LOW);
        lcd.setCursor(0, 1);
        lcd.print("FAN : 3  ");
      }
       if (temperature < 28)
       {
        digitalWrite(3, HIGH);
        digitalWrite(4, HIGH);
        digitalWrite(5, HIGH);
        lcd.setCursor(0, 1);
        lcd.print("FAN : STOP");
       
      }
      else if (temperature >= 34)
       {
        digitalWrite(3, HIGH);
        digitalWrite(4, HIGH);
        digitalWrite(5, HIGH);
        lcd.setCursor(0, 1);
        lcd.print("FAN : STOP");
       
      }
      delay(500);
}
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