#include <DHT.h>;
#define DHTPIN 7     // what pin we're connected to
#define DHTTYPE DHT22   // DHT 22  (AM2302)
DHT dht(DHTPIN, DHTTYPE);

#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd (0x27, 16, 2);

int hum;
int temp;

int heater = 9;
int AC = 8;

void setup() {
  dht.begin();
  lcd.init();
  lcd.backlight();
  pinMode (heater, OUTPUT);
  pinMode (AC, OUTPUT);
}

void loop() {
  lcd.setCursor (0, 1);
  lcd.print ("               ");  
    hum = dht.readHumidity();
    temp= dht.readTemperature();
    lcd.setCursor (0, 0);
    lcd.print ("T: ");
    lcd.setCursor (3, 0);
    lcd.print (temp);
    lcd.setCursor (10, 0);
    lcd.print ("H: ");
    lcd.setCursor (13, 0);
    lcd.print (hum);

    if (temp < 20){
      digitalWrite (heater, HIGH);
      digitalWrite (AC, LOW);
      lcd.setCursor (0, 1);
      lcd.print ("AC OFF, Heat ON");
      delay (1000);
    }
    if (temp > 20 && temp < 26){
       digitalWrite (heater, LOW);
      digitalWrite (AC, LOW);
      lcd.setCursor (0, 1);
      lcd.print ("AC OFF, Heat OFF");
      delay (1000);
    }

    if (temp > 26){
      digitalWrite (heater, LOW);
      digitalWrite (AC, HIGH);
      lcd.setCursor (0, 1);
      lcd.print ("AC ON, Heat OFF");
      delay (1000);
    }
}