#include <LiquidCrystal_I2C.h>
#include <Wire.h>
LiquidCrystal_I2C lcd(0x27, 22 , 4);

#include <DHT.h>
#define  dhtPin 18
#define  relayPin 17
#define  dhttype DHT22
DHT dht(dhtPin, dhttype);

void setup() {
  Serial.begin(115200);
  pinMode(relayPin, OUTPUT);
  lcd.init();
  lcd.backlight();
  lcd.clear();
  dht.begin();
}

void loop() {
  float humi = dht.readHumidity();
  float temp = dht.readTemperature(); // true จะเปลี่ยนองศา

  if (isnan(humi) || isnan(temp)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
  /*
  Serial.print("Humidity : "); 
  Serial.print(humi);
  Serial.print("%");
  Serial.print("/t");
  Serial.print("Temperature : ");
  Serial.print(temp);
  Serial.print(" °C");
*/

  lcd.setCursor(0,0);  
  lcd.print("Humi : ");
  lcd.print(humi);
  lcd.print(" %");

  lcd.setCursor(0,1);  
  lcd.print("Temp : ");
  lcd.print(temp);
  lcd.print(" ");
  lcd.print((char)223);
  lcd.print("C");
  

  if (temp > 25) {
    digitalWrite(relayPin, HIGH);
    lcd.setCursor(0,2);
    lcd.print("Airconditional Open");
  }
  else{
    digitalWrite(relayPin, LOW);
    lcd.setCursor(0,2);
    lcd.print("Airconditional Off ");
  }

}