#include <LiquidCrystal.h>
#include <DHT.h>

#define DHTPIN 2
#define DHTTYPE DHT22

#define PIR_PIN 9
#define LIGHT_PIN 6

#define TRIG_PIN 11
#define ECHO_PIN 12


#define LED_PIN 8
#define BUZZER_PIN 4
LiquidCrystal lcd(10, 5, 7, 3, 13, A1);

DHT dht(DHTPIN, DHTTYPE);
bool alarm = false;

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

  lcd.begin(16,2);
  lcd.setCursor(0,0);
  lcd.print("RUMAH BIJARKSS");
  delay(2000);
  lcd.clear();

  pinMode(PIR_PIN, INPUT);
  pinMode(LIGHT_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);

  dht.begin();
}

void loop() {

  int motion = digitalRead(PIR_PIN);
  float temp = dht.readTemperature();
  float hum = dht.readHumidity();

  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  long duration = pulseIn(ECHO_PIN, HIGH);
  float distance = duration * 0.034 / 2;

  int light = analogRead(A0);
  
  String statusSec = "SAFE "; 
  alarm = false; 

  if (motion == HIGH) {
    statusSec = "NEAR "; 
    alarm = true;
  } 
  
  if (light > 400 ) { 
    statusSec = "DARK ";
    alarm = true;
  } 
  
  if (distance > 0 && distance < 30) { 
    statusSec = "CLOSE";
    alarm = true;
  } 
  
  if (temp > 40 && hum < 60) {
    statusSec = "HOT  ";
    alarm = true;
  }

 // LCD Row 1
  lcd.setCursor(0, 0);
  lcd.print("T:");
  lcd.print(temp, 0);
  lcd.print(" H:");
  lcd.print(hum, 0);
  lcd.print("%");

  // LCD Row 2
  lcd.setCursor(0, 1);
  lcd.print(statusSec);
  lcd.print("dist ");
  lcd.print(distance, 0);
  lcd.print("cm   ");
  
  delay(2000);


  if (alarm == true) {
    digitalWrite(LED_PIN, HIGH);
    tone(BUZZER_PIN, 1000); 
    delay(200);
    
    digitalWrite(LED_PIN, LOW);    
    noTone(BUZZER_PIN);     
    delay(200);
  } 
  else {
    digitalWrite(LED_PIN, LOW);
    noTone(BUZZER_PIN);
    delay(1000);
  }
}