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

LiquidCrystal_I2C lcd(0x27, 20, 4);  // Alamat I2C default LCD biasanya 0x27

const int trigPin = 12;
const int echoPin = 14;
const int pirPin = 27;       // Pin PIR
const int photoPin = 34;     // Pin LDR (analog)
const int ledPin1 = 2;       // Pin LED (misalnya pin 13)
const int ledPin2 = 0; 
const int ledPin3 = 4; 
#define SOUND_SPEED 0.034
#define CM_TO_INCH 0.393701

long duration;
float distanceCm;
float distanceInch;
int pirState = LOW;
int lightLevel;

void setup() {
  Serial.begin(115200);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(pirPin, INPUT);
  pinMode(photoPin, INPUT);
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin3, OUTPUT);  // Set pin LED sebagai output

  lcd.begin(20, 4);
  lcd.init();
  lcd.backlight();  // Nyalain backlight LCD
}

void loop() {
  // Baca sensor PIR
  pirState = digitalRead(pirPin);
  
  // Baca sensor photoresistor (LDR)
  lightLevel = analogRead(photoPin);

  // Baca sensor ultrasonik
  digitalWrite(trigPin, LOW);
  delayMicroseconds(100);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(100);
  digitalWrite(trigPin, LOW);
  
  duration = pulseIn(echoPin, HIGH);
  distanceCm = duration * SOUND_SPEED / 2;
  distanceInch = distanceCm * CM_TO_INCH;

  // Debug output di Serial Monitor
  Serial.print("Distance (cm): ");
  Serial.println(distanceCm);
  Serial.print("Distance (inch): ");
  Serial.println(distanceInch);
  Serial.print("Gerakan: ");
  Serial.println(pirState);
  Serial.print("Light Level: ");
  Serial.println(lightLevel);

  // Tampilkan data di LCD 20x4
  lcd.clear();

  // Baris 1: Jarak dalam cm dan inch
  lcd.setCursor(0, 0);
  lcd.print("Jarak: ");
  lcd.print(distanceCm);
  lcd.print("cm");

  lcd.setCursor(0, 1);
  if (distanceCm > 300) {
    lcd.print("Status: Terlalu Jauh");
    digitalWrite(ledPin1, LOW);
  } else {
    lcd.print("Status: Cukup Dekat");
    digitalWrite(ledPin1, HIGH);
  }

  lcd.setCursor(0, 2);
  if (pirState == HIGH) {
    lcd.print("Gerakan: Terdeteksi");
    digitalWrite(ledPin2, HIGH);
  } else {
    lcd.print("Gerakan: Tidak Ada");
    digitalWrite(ledPin2, LOW);
  }

  // Baris 3: Level Cahaya dari LDR
  lcd.setCursor(0, 3);
  if (lightLevel > 500){
    lcd.print("Cahaya: ");
    lcd.print(lightLevel);
    lcd.print("(Terang)");
    digitalWrite(ledPin3, LOW);  // LED mati jika cahaya terang
  }
  else{
    lcd.print("Cahaya:");
    lcd.print(lightLevel);
    lcd.print("(Gelap)");
    digitalWrite(ledPin3, HIGH);  // LED nyala jika cahaya gelap
  }
  
  delay(3000);
}