#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#define DHTPIN 10
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHT22);

#define LED_MERAH 11
#define LED_HIJAU 12

LiquidCrystal_I2C lcd(0x27,20,4);
int chk;
float hum;
float temp;

void setup() {
  Serial.begin(9600);
  dht.begin();
  pinMode(LED_MERAH, OUTPUT);
  pinMode(LED_HIJAU, OUTPUT);
 }
void loop() {
 hum = dht.readHumidity();
 temp = dht.readTemperature();
  lcd.init();
  lcd.backlight();
  lcd.setCursor(3,0);
  lcd.print("Papan Informasi");
  //suhu
  lcd.setCursor(0,2);
  lcd.print("Suhu       :");
  lcd.setCursor(13,2);
  lcd.print(temp);
  lcd.setCursor(19,2);
  lcd.print("C");
  //kelembaban
  lcd.setCursor(0,3);
  lcd.print("Kelembaban :");
  lcd.setCursor(13,3);
  lcd.print(hum);
  lcd.setCursor(19,3);
  lcd.print("%");

  if ( isnan(temp&&hum)) {
    Serial.println("Gagal membaca data dari sensor DHT!");
    lcd.setCursor(0,0);
    lcd.print("Sensor Error");
  } 
  else if(temp>=37) {
    digitalWrite(LED_MERAH, HIGH); 
    digitalWrite(LED_HIJAU, LOW); 
    Serial.println("SUHU PANAS");
    lcd.setCursor(0,1);
    lcd.print("SUHU PANAS     ");

  } else if (temp>=30) {
    digitalWrite(LED_HIJAU, HIGH); 
    digitalWrite(LED_MERAH, LOW); 
    Serial.println("SUHU NORMAL");
    lcd.setCursor(0,1);
    lcd.print("SUHU NORMAL     ");

  }else if (temp>=1) {
    digitalWrite(LED_HIJAU, HIGH); 
    digitalWrite(LED_MERAH, LOW); 
    Serial.println("SUHU DINGIN");
    lcd.setCursor(0,1);
    lcd.print("SUHU DINGIN     ");
  }
  delay(500);
  //delay(500);
  //lcd.clear();
}