#include "DHT.h"
#include <LiquidCrystal_I2C.h>
#define DHTPIN A0    
#define DHTTYPE DHT22 


#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   2

//create instances for the sensor and lcd
DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

void setup() {
  Serial.begin(9600);
  Serial.println(F("DHTxx test!"));

  //begin the dht sensor and lcd
  dht.begin();

  lcd.init();
  lcd.backlight();

}

void loop() {
  // Wait a few seconds between measurements.
  delay(2);

  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  float f = dht.readTemperature(true);

  char degree_symbol = 0x00+223;
  char percent_symbol = 0x00+37;



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

  //humidity output on lcd
  lcd.setCursor(0, 0);
  lcd.print(F("Humidity: "));
  lcd.print(h);
  lcd.print(percent_symbol);

  //temperature output on lcd
  lcd.setCursor(0, 1);
  lcd.print(F("Temp: "));
  lcd.print(t);
  lcd.print((degree_symbol));
  lcd.print(("C"));

  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  \n Temperature: "));
  Serial.print(t);
  Serial.print("C ");
  delay(200);


}