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

#define DHTPIN 2     // Digital pin connected to the DHT sensor

//#define DHTTYPE DHT11
//#define DHTTYPE DHT21
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27,16,2); // 접근주소: 0x3F or 0x27
  
void setup() {
  Serial.begin(9600);
  dht.begin();
  lcd.init();   // LCD 초기화
  lcd.backlight();  // LCD 백라이트 켜기
}
void loop() {
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  float f = dht.readTemperature(true);

  lcd.setCursor(0,0); lcd.print("TEMP: "); lcd.print(t); 
lcd.setCursor(0,1); lcd.print("HUMID: "); lcd.print(h); 

Serial.print("Humidity: ");
  Serial.print(h,1);
  Serial.print("%  Temperature: ");
  Serial.print(t,1);
  Serial.print("C & ");
  Serial.print(f,1);
  Serial.println("F");

int ldr = A2;
int led = 8;
int nilai;

  // put your setup code here, to run once:
    Serial.begin(9600);
      pinMode(led, OUTPUT);


        // put your main code here, to run repeatedly:
          nilai = analogRead(ldr);
            Serial.print("Nilai LDR : ");
              Serial.println(nilai);

                if(nilai > 800){
                    digitalWrite(led, HIGH);
                        Serial.println("Keadaan gelap, relay menyala");
                          }else{
                              digitalWrite(led, LOW);
                                  Serial.println("Keadaan terang, relay mati");
                                    }
                                      delay(1000);
                                      }