ESP8266發送DHT-11的溫濕度值到Line通知

https://atceiling.blogspot.com/2019/07/arduino39dht-11line.html

#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <DHT.h>
#include <TridentTD_LineNotify.h>

#define DHTTYPE DHT11
#define DHTPIN  2

// 修改成上述寄到登入郵箱的 Token號碼
#define LINE_TOKEN "123456789012345678901234567890123456789012"

// 設定無線基地台SSID跟密碼
const char* ssid     = "MyHome";
const char* password = "12345678";

DHT dht(DHTPIN, DHTTYPE, 11);    // 11 works fine for ESP8266
 
float humidity, temp_f;   // 從 DHT-11 讀取的值

unsigned long previousMillis = 0;        // will store last temp was read
const long interval = 2000;              // interval at which to read sensor

// 用不到以下兩個變數
// const char* host = "notify-api.line.me";
// const int httpsPort = 443;
 
void setup(void)
{
  Serial.begin(9600);  // 設定速率 感測器
  dht.begin();           // 初始化

  WiFi.mode(WIFI_STA);
  // 連接無線基地台
  WiFi.begin(ssid, password);
  Serial.print("\n\r \n\rWorking to connect");

  // 等待連線，並從 Console顯示 IP
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("DHT Weather Reading Server");
  Serial.print("Connected to ");
  Serial.println(ssid);
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
}
 
void loop(void)
{
  // 量測間等待至少 2 秒
  unsigned long currentMillis = millis();
 
  if(currentMillis - previousMillis >= interval) {
    // 將最後讀取感測值的時間紀錄下來 
    previousMillis = currentMillis;   

    // 讀取溫度大約 250 微秒!
    humidity = dht.readHumidity();          // 讀取濕度(百分比)
    temp_f = dht.readTemperature(true);     // 讀取溫度(華氏)
    
 
    // 檢查兩個值是否為空值
    if (isnan(humidity) || isnan(temp_f)) {
       Serial.println("Failed to read from DHT sensor!");
       return;
    }
  }

  String tempe="溫度:"+String((int)(temp_f-32)*5/9)+"℃";   
  String humid="濕度:"+String((int)humidity)+"％";

  // 顯示 Line版本
  Serial.println(LINE.getVersion());
 
  LINE.setToken(LINE_TOKEN);

  // 先換行再顯示
  LINE.notify("\n" + tempe + " ；" + humid);
      
  // 每2分鐘發送一次
  delay(120000);
}