#include <DHT.h>
#include <LiquidCrystal_I2C.h>
#define DHTPIN 3
#define DHTTYPE DHT22
#define I2C_ADDR 0x27
#define LCD_COLUMNS 20
#define LCD_LINES 4
DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

void setup() {
  Serial.begin(9600);
  Serial.println("DHTxx test!");
  dht.begin();
  lcd.init();
  lcd.backlight();

}

void loop() {
  delay(2000);

  float h = dht.readHumidity();
  float t = dht.readTemperature();
  float f = dht.readTemperature(true);

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

  float hif = dht.computeHeatIndex(f, h);
  float hic = dht.computeHeatIndex(f, h, false);

  lcd.setCursor(7, 0);
  lcd.print("DHT 22");

  Serial.print("Humidity: ");
  Serial.print(h);
  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(h);
  lcd.print(" %");
  
  Serial.print("% Temperature: ");
  Serial.print(t);
  lcd.setCursor(0, 2);
  lcd.print("Temp(C): ");
  lcd.print(t);
  lcd.print(" C");
  lcd.setCursor(0, 3);
  lcd.print("Temp(F): ");
  lcd.print(f);
  lcd.print(" F");
  Serial.print("°C ");
  Serial.print(f);
  Serial.print("°F Heat index: ");
  Serial.print( hic);
  Serial.print("°C ");
  Serial.print( hif);
  Serial.println("°F ");

}