實驗 用 LINE 發送天氣預報

 用 LINE 發送天氣預報

 ---參考益師傅  益師傅 MQTT 與 IoT 整合運用

之前提到可以Node-RED 透過 MQTT 讓 ESP32 或是 MQTT Dash 收到天氣預報資料,昨晚也提到又能從 MQTT Dash 透過 ON TAP 事件再 PUBLISH 讓 ESP32 變更區域天氣,也變更了 MQTT Dash 上的天氣狀況.

這樣便能透過手機區域選單方式,運用 MQTT 機制即時變更天氣資訊.

所以在原本 Node-RED 加上 觸發 LINE 發送機制. 雖然 Node-RED 可以安裝 LINE Notify 直接發送訊息,但這個元件卻只能發送您想發送的資料訊息或圖形,無法結合 抓回天氣預報的 payload 資料. 所以就以運用以前在 MCU 上 的 HTTP POST 服務寫法來觸發 LINE 傳送天氣預報資訊.

透過 f函式元件 將氣溫相關資訊取出組合,然後透過 另一個 f函示來組合 LINE 發送的方式,最後透過 HTTP request 提出發送需求,這樣就完成了天氣預報功能.

然後再將 inject 改為每30分鐘觸發一次,

var message = "\n 台中今日天氣 :  "+msg.payload.weather[0].main+ "\n";

message += "目前溫度: " + msg.payload.main.temp+"\n";

message += "最高溫度: " + msg.payload.main.temp_max+"\n";

message += "最低溫度: " + msg.payload.main.temp_min+"\n";

message += "===========================";

msg.payload=message;

return msg;

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