#include <DHT22.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd (0x27,16,2);

#define relay 2
#define pinDATA 3

DHT22 dht22(pinDATA); 

void setup() {
  // put your setup code here, to run once:
  pinMode(relay, OUTPUT);
  Serial.begin(115200); //1bit=10µs
  Serial.println("\ntest capteur DTH22");
  lcd.init();
  lcd.backlight();
}

void loop() {
  float temp = dht22.getTemperature();
  float h = dht22.getHumidity();

  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Suhu:");
  lcd.print(temp);
  lcd.setCursor(0,1);
  lcd.print("Kelembaban: ");
  lcd.print(h);

  if (dht22.getLastError() != dht22.OK) {
    Serial.print("last error :");
    Serial.println(dht22.getLastError());
  }

  if (temp > 25){
    digitalWrite(relay, HIGH);
  }
  
  else {
    digitalWrite(relay, LOW);
  }
  Serial.print("h=");Serial.print(h,1);Serial.print("\t");
  Serial.print("temp=");Serial.println(temp,1);
  delay(2000); //Collecting period should be : >1.7 second
}