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

#define DHTPIN 2
#define DHTTYPE DHT22
#define TRIG_PIN 3
#define ECHO_PIN 4
#define LED_PIN 5
#define BUZZER_PIN 6
#define LDR_PIN A0

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

void setup() {
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(LDR_PIN, INPUT);

  Serial.begin(9600);
  dht.begin();
  lcd.init();
  lcd.backlight();

  lcd.setCursor(0, 0);
  lcd.print("KELOMPOK 1");
  lcd.setCursor(0, 1);
  lcd.print("DETEKSI BANJIR");

  delay(1000);

  for (int lcdPosition = 0; lcdPosition < 20; lcdPosition++) {
    lcd.scrollDisplayLeft();
    delay(300);
  }

  lcd.clear();
}

void loop() {
  float suhu = dht.readTemperature();
  float kelembapan = dht.readHumidity();

  int ldrValue = analogRead(LDR_PIN);
  bool mendung = ldrValue < 500;

  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  long duration = pulseIn(ECHO_PIN, HIGH);
  float jarak = duration * 0.034 / 2;

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("S:");
  lcd.print(suhu);
  lcd.print("C H:");
  lcd.print(kelembapan);

  lcd.setCursor(0, 1);
  lcd.print("J:");
  lcd.print(jarak);
  lcd.print("cm ");
  lcd.print(mendung ? "MD" : "TR");

  Serial.print("Suhu: "); Serial.print(suhu); Serial.print(" C, ");
  Serial.print("Kelembapan: "); Serial.print(kelembapan); Serial.print(" %, ");
  Serial.print("Jarak: "); Serial.print(jarak); Serial.print(" cm, ");
  Serial.print("LDR: "); Serial.println(ldrValue);

  if (jarak < 30 || suhu < 30 || mendung) {
    digitalWrite(LED_PIN, HIGH);
    tone(BUZZER_PIN, 1000);
  } else {
    digitalWrite(LED_PIN, LOW);
    noTone(BUZZER_PIN);
  }

  delay(1000);
}