//channel id:2708600
//channel api key:J7R1O5JUBXVXIHKW
#include <DHT.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define DHTPIN 27     // DHT11 連接到 ESP32 的哪個引腳
#define DHTTYPE DHT22   // DHT 型號選擇

DHT dht(DHTPIN, DHTTYPE);


// LCD設定
#define LCD_ADDRESS 0x27
#define LCD_COLUMNS 16
#define LCD_ROWS 2
LiquidCrystal_I2C lcd(LCD_ADDRESS, LCD_COLUMNS, LCD_ROWS);

void setup() {
  Serial.begin(9600);
  Serial.println("DHT11 溫濕度測試!");

  // 初始化LCD
  lcd.init();
  lcd.backlight();

  dht.begin();
}

void loop() {
  delay(2000);  // 等待 2 秒再讀取溫濕度值

  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  if (isnan(humidity) || isnan(temperature)) {
    Serial.println("無法從 DHT 感測器讀取數據!");
    return;
  }

  Serial.print("溫度: ");
  Serial.print(temperature);
  Serial.print(" °C, 濕度: ");
  Serial.print(humidity);
  Serial.println("%");

  // 顯示溫濕度資訊到LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print("C");
  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(humidity);
  lcd.print("%");

}