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

// ----------------- LCD -----------------
LiquidCrystal_I2C lcd(0x27, 20, 4);  // Change 0x27 to 0x3F if needed

// ----------------- DHT22 -----------------
#define DHTPIN 7          // DHT22 connected to pin 7
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// ----------------- DS18B20 -----------------
#define ONE_WIRE_BUS 6    // DS18B20 connected to pin 6
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

void setup() {
  lcd.init();
  lcd.backlight();

  dht.begin();
  sensors.begin();

  // Welcome message
  lcd.setCursor(0, 0);
  lcd.print("sensor working...");
  lcd.setCursor(0, 1);
  lcd.print("Initializing...");
  delay(2000);
  lcd.clear();
}

void loop() {
  // Read sensors
  float h = dht.readHumidity();          // Humidity from DHT22
  float t = dht.readTemperature();       // Temp from DHT22
  sensors.requestTemperatures();
  float tempDS = sensors.getTempCByIndex(0);  // Temp from DS18B20

  // Display format
  lcd.setCursor(0, 0);
  lcd.print("Temperature: ");
  lcd.print(t, 1);
  lcd.print((char)223);
  lcd.print("C");

  lcd.setCursor(0, 1);
  lcd.print("Moisture:    ");
  lcd.print(h, 1);
  lcd.print("%   ");

  lcd.setCursor(0, 2);
  lcd.print("DS18B20:     ");
  lcd.print(tempDS, 1);
  lcd.print((char)223);
  lcd.print("C");

  delay(2000);
}