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

#define DHTPIN 2     
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321

#define ECHO_PIN 3
#define TRIG_PIN 4

LiquidCrystal_I2C lcd(0x27, 16, 2);
DHT dht(DHTPIN, DHTTYPE);

int vr=A0;
int vrvalue;

float readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn(ECHO_PIN, HIGH);
  return duration * 0.034 / 2;
}

void setup() {
Serial.begin(9600);

pinMode(LED_BUILTIN, OUTPUT);

pinMode(TRIG_PIN, OUTPUT);
pinMode(ECHO_PIN, INPUT);

dht.begin();

lcd.init();
lcd.backlight();
}

void loop() {

float temperature = dht.readTemperature();
float humidity = dht.readHumidity();

// vrvalue=analogRead(vr);

float distance = readDistanceCM();

// bool isNearby = distance < 100;

Serial.println(temperature);
lcd.setCursor(11,0);
lcd.println(temperature);
lcd.setCursor(0,0);
lcd.println("Suhu skrg = ");

lcd.setCursor(11,1);
lcd.println(distance);

lcd.setCursor(0,1);
lcd.println("dist skrg = ");


if (distance < 50 && temperature >17){
  digitalWrite(LED_BUILTIN, true);
} else {
  digitalWrite(LED_BUILTIN, false);
}

}