#include "DHT.h"

#define DHTPIN 21   

#define DHTTYPE DHT22  

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  pinMode(2, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  delay(1000);

  float h = dht.readHumidity();
 
  float t = dht.readTemperature();

  float f = dht.readTemperature(true);


  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }


  float hif = dht.computeHeatIndex(f, h);
 
  float hic = dht.computeHeatIndex(t, h, false);


  Serial.print(F(" Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.print(F("°C "));
  Serial.print(f);
  Serial.print(F("°F  Heat index: "));
  Serial.print(hic);
  Serial.print(F("°C "));
  Serial.print(hif);
  Serial.println(F("°F"));
  

    if(h < 15 && t < 15){
    
     digitalWrite(5, HIGH);
     delay(1000);
     digitalWrite(5, LOW);
  }
  

  if(h >= 16  && h <= 40 && t <= 15){
    
     digitalWrite(4, HIGH);
     delay(1000);
     digitalWrite(4, LOW);
  }
   

   if(h >= 40  && h <= 60 && t <= 15){
    
     digitalWrite(2, HIGH);
     delay(1000);
     digitalWrite(2, LOW);
  }

    if(h <= 15  && t >= 16 && t <= 40){
    
     digitalWrite(4, HIGH);
     delay(1000);
     digitalWrite(4, LOW);
  }
  
    if(h <= 15  && t >= 40 && t <= 60){
    
     digitalWrite(2, HIGH);
     delay(1000);
     digitalWrite(2, LOW);
  }


  if(h >= 16  && h <= 40 && t >= 40 && t <= 60){
    
     digitalWrite(5, HIGH);
     delay(1000);
     digitalWrite(5, LOW);
  }


  
  
}