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

#define DHTPIN 14
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

LiquidCrystal_I2C lcd(0x27, 16, 2); 

void setup() {
  Serial.begin(115200);
  dht.begin();

  Wire.begin(21, 22); 
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0); lcd.print("Hello, ESP32!");
  lcd.setCursor(0,1); lcd.print("LCD I2C Test");
}

void loop() {
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  if (isnan(h) || isnan(t)) {
    Serial.println("อ่านค่าจาก DHT22 ไม่สำเร็จ!");
    delay(2000);
    return;
  }

  // แสดงผลทั้ง Serial และ LCD
  Serial.print("Humidity: "); Serial.print(h);
  Serial.print(" %\tTemperature: "); Serial.print(t); Serial.println(" °C");

  lcd.clear();
  lcd.setCursor(0,0); lcd.print("Temp: " + String(t) + "C");
  lcd.setCursor(0,1); lcd.print("Hum: " + String(h) + "%");

  delay(2000);
}