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

LiquidCrystal_I2C lcd(0x27, 16, 2); //16 col, 2 row

#define DHTPIN A3
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE); //initi senr to 16mhz arduino

int h, t;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  //Serial.println("Temperature and Humidity Sensor test!");
  dht.begin();
  lcd.init();
  lcd.backlight();
  pinMode(2, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  //read data and store it to variables h ,t.
    //reading them takes 250 ms
  h = dht.readHumidity();
  t = dht.readTemperature();

  /*//Print temp and humidity values to serial monitor
    Serial.print("Humidity: ");
    Serial.print(h);
    Serial.print(" %, Temp: ");
    Serial.print(t);
    Serial.println(" ° Celsius");
    */

  //set lcd cursor..
  lcd.setCursor(0,0);
  lcd.println("Temperature and");
  lcd.setCursor(0,1);
  lcd.println("Humidity sensor!");
  delay(1000);

  lcd.setCursor(0,0);
  lcd.println("Simple Ciruits ");

  lcd.setCursor(0,1); //below row
  lcd.println("T:");
  lcd.print(t);
  lcd.println("C");
  
  lcd.setCursor(8,1); //below row
  lcd.println("H:");
  lcd.print(h);
  lcd.println("%");

  if(h>=50 || t>=50)
    digitalWrite(2, HIGH);
  else
  digitalWrite(2, LOW);

  delay(1000);
}