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

LiquidCrystal_I2C lcd(0x27, 16, 2); // Alamat I2C LCD

int pirPin = 7;
int ledPin = 6;
int buzzerPin = 4; // Ubah dari pin 5 ke pin 4 untuk hindari konflik timer

int redPin = 9;
int greenPin = 10;
int bluePin = 11;

bool motionDetected = false;
unsigned long lastMotionTime = 0;
unsigned long motionDuration = 2000; // 2 detik setelah gerakan, alarm tetap menyala

void setup() {
  pinMode(pirPin, INPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);

  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);

  Serial.begin(9600);
  lcd.begin(16, 2);
  lcd.backlight();

  setRGB(0, 0, 255); // Standby warna biru
  lcd.setCursor(0, 0);
  lcd.print("Kalibrasi...");
  delay(3000);

  lcd.clear();
  lcd.print("Sensor aktif");
  Serial.println("Sensor aktif");
  setRGB(0, 255, 0); // Hijau = aman
}

void loop() {
  int motion = digitalRead(pirPin);

  if (motion == HIGH) {
    motionDetected = true;
    lastMotionTime = millis();

    digitalWrite(ledPin, HIGH);
    for (int i = 1000; i <= 2000; i += 50) {
    tone(buzzerPin, i);
    delay(10);
}
for (int i = 2000; i >= 1000; i -= 50) {
    tone(buzzerPin, i);
    delay(10);
}
    setRGB(255, 0, 0); // Merah = gerakan

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Gerakan");
    lcd.setCursor(0, 1);
    lcd.print("Terdeteksi!!");
    Serial.println("Gerakan terdeteksi!");
  }

  if (motionDetected && millis() - lastMotionTime > motionDuration) {
    motionDetected = false;
    digitalWrite(ledPin, LOW);
    noTone(buzzerPin);
    setRGB(0, 255, 0); // Hijau = aman kembali

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Tidak ada");
    lcd.setCursor(0, 1);
    lcd.print("gerakan");
  }

  delay(100);
}

void setRGB(int r, int g, int b) {
  analogWrite(redPin, r);
  analogWrite(greenPin, g);
  analogWrite(bluePin, b);
}