#include <OneWire.h>
#include <DallasTemperature.h>

#define ONE_WIRE_BUS 8
#define RELAY1_PIN 7
#define RELAY2_PIN 6

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

float temp;

void setup() {
  // Start up the library
  sensors.begin();
  // Set relay pins as output
  pinMode(RELAY1_PIN, OUTPUT);
  pinMode(RELAY2_PIN, OUTPUT);
}

void loop() {
  // Requests a temperature reading from the sensor
  sensors.requestTemperatures();
  temp = sensors.getTempCByIndex(0);
  // If temperature is 25º or higher
  if (temp >= 25) {
    digitalWrite(RELAY1_PIN, HIGH);
    delay(5 * 60 * 1); // 5 minutes delay
    digitalWrite(RELAY1_PIN, LOW);
  }
  // If temperature is between 20º and 24º
  else if (temp >= 20 && temp < 25) {
    // Do nothing
  }
  // If temperature is lower than 20º
  else if (temp < 20) {
    digitalWrite(RELAY2_PIN, HIGH);
    delay(5 * 60 * 1); // 5 minutes delay
    digitalWrite(RELAY2_PIN, LOW);
  }
  // If temperature is lower than 15º
  else {
    // Windows must be closed, do nothing
  }
  // Read temperature again after 15 minutes
  delay(15 * 60 * 1);
}