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

LiquidCrystal_I2C lcd(0x27, 16, 2);  // LCD address and dimensions

#define DHTPIN 11
#define DHTTYPE DHT22 
DHT dht(DHTPIN, DHTTYPE);

byte degree_symbol[8] = {
  0b00111,
  0b00101,
  0b00111,
  0b00000,
  0b00000,
  0b00000,
  0b00000,
  0b00000
};

void setup() 
{
  lcd.init();
  lcd.backlight();
  lcd.print("Weather Station");
  delay(3000);
  lcd.clear();

  lcd.print("Data Fecting....");
  delay(2000);
  lcd.clear();

  lcd.print("Temp = ");
  lcd.setCursor(0, 1);
  lcd.print("Humidity = ");
  
  lcd.createChar(1, degree_symbol);
  lcd.setCursor(9, 0);
  lcd.write(1);
  lcd.print("C");
  lcd.setCursor(13, 1);
  lcd.print("%");
  dht.begin();
}

void loop() 
{
  delay(1000);
  const int numReadings = 5;
  float tempSum = 0;
  float humSum = 0;
  int validReadings = 0;

  for (int i = 0; i < numReadings; i++) {
    float temperature = dht.readTemperature();
    float humidity = dht.readHumidity();
    if (!isnan(temperature) && !isnan(humidity)) {
      tempSum += temperature;
      humSum += humidity;
      validReadings++;
    }
    delay(100);
  }

  if (validReadings > 0) 
  {
      float avgTemp = tempSum / validReadings;
      float avgHum = humSum / validReadings;
      //For Temperature
      lcd.setCursor(7, 0);
      lcd.print("     ");
      lcd.setCursor(7, 0);
      lcd.print(avgTemp, 1);
      lcd.print(" C");
      //For Humanity
      lcd.setCursor(11, 1);
      lcd.print("     ");
      lcd.setCursor(11, 1);
      lcd.print(avgHum, 1);
      lcd.print("%");
  } 
  else
  {
    lcd.setCursor(7, 0);
    lcd.print("Err ");
    lcd.setCursor(11, 1);
    lcd.print("Err ");
  }
}