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

// === KONFIGURASI PIN ===
#define DHTPIN 4
#define DHTTYPE DHT22   // ✅ GANTI dari DHT11 ke DHT22
#define LDR_PIN 34
#define TRIG_PIN 5
#define ECHO_PIN 18

// === INISIALISASI SENSOR ===
DHT dht(DHTPIN, DHTTYPE);

// === INISIALISASI LCD ===
// Ubah alamat I2C sesuai hasil scan
LiquidCrystal_I2C lcdLDR(0x27, 16, 2);        // LCD1: LDR
LiquidCrystal_I2C lcdDHT(0x26, 16, 2);        // LCD2: DHT22
LiquidCrystal_I2C lcdUltrasonic(0x25, 16, 2); // LCD3: Ultrasonik

void setup() {
  Serial.begin(115200);
  Wire.begin(21, 22); // SDA, SCL ESP32

  // Inisialisasi LCD
  lcdLDR.begin(16, 2); lcdLDR.backlight();
  lcdDHT.begin(16, 2); lcdDHT.backlight();
  lcdUltrasonic.begin(16, 2); lcdUltrasonic.backlight();

  // Label awal
  lcdLDR.setCursor(0, 0); lcdLDR.print("Sensor Cahaya");
  lcdDHT.setCursor(0, 0); lcdDHT.print("Sensor DHT22");
  lcdUltrasonic.setCursor(0, 0); lcdUltrasonic.print("Sensor Jarak");

  // Inisialisasi sensor
  dht.begin();
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
}

void loop() {
  // === LDR ===
  int nilaiLDR = analogRead(LDR_PIN);
  lcdLDR.setCursor(0, 1);
  lcdLDR.print("LDR: ");
  lcdLDR.print(nilaiLDR);
  lcdLDR.print("     ");

  // === DHT22 ===
  float suhu = dht.readTemperature();
  float kelembapan = dht.readHumidity();
  lcdDHT.setCursor(0, 1);
  if (isnan(suhu) || isnan(kelembapan)) {
    lcdDHT.print("Error membaca  ");
  } else {
    lcdDHT.print("T:"); lcdDHT.print(suhu, 1); lcdDHT.print("C ");
    lcdDHT.print("H:"); lcdDHT.print(kelembapan, 1); lcdDHT.print("%");
  }

  // === Ultrasonik ===
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  long durasi = pulseIn(ECHO_PIN, HIGH);
  float jarak = durasi * 0.034 / 2;
  lcdUltrasonic.setCursor(0, 1);
  lcdUltrasonic.print("Jarak: ");
  lcdUltrasonic.print(jarak, 1);
  lcdUltrasonic.print(" cm   ");

  delay(1000);
}