#include "DHT.h"
#define DHTPIN 15 
#define DHTTYPE DHT22 

DHT dht(DHTPIN, DHTTYPE);    


const int fanPin = 5; 

float temperatureThreshold = 30.0; 

void setup() {
  Serial.begin(115200);
  dht.begin();
  
  pinMode(fanPin, OUTPUT);
  digitalWrite(fanPin, LOW); 
}

void loop() {
  
  float temperature = dht.readTemperature();
  
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");

  
  if (temperature >= temperatureThreshold) {
    
    digitalWrite(fanPin, HIGH);
    Serial.println("Cooling system ON");
  } 
  else {
    
    digitalWrite(fanPin, LOW);
    Serial.println("Cooling system OFF");
  }

  delay(2000); 
}