使用樹莓派搭建溫溼度監控告警系統

時間  2020-04-06
標籤 使用 樹莓 搭建 溫溼度 監控 告警 系統 简体版
原文   原文鏈接

本文做者：天工智能物聯網node

簡介

本文檔介紹了基於樹莓派+百度天工（物接入、TSDB、物可視）快速搭建一個環境溫溼度監測告警系統。幫助用戶熟悉天工物接入的接入方式、物影子概念以及使用方式等內容，快速搭建本身物聯網硬件和應用。json

閱讀本示例前建議先熟悉快速入門文檔。小程序

場景描述

該場景演示物聯網應用場景中經常使用的功能，包括設備接入、數據上報、數據存儲、數據展現、遠程控制、配置下發等。微信小程序

  • 硬件設計
    首先咱們設計了一款智能溫溼度監測儀，監測儀運行時會實時監測當前所處環境的溫溼度，同時能夠設置溫溼度的告警值，當溫溼度達到設定值時，相應的告警燈亮起——這是設備硬件部分具有的功能，還未涉及到物聯網api

  • 設備接入
    爲了可以實時查看到環境溫信息，進而須要將設備接入物聯網平臺，若是當前環境溫溼度達到設置的閾值，觸發設備告警燈亮起，並上報設備當前狀態和溫溼度信息，正常狀況下則每30秒上報一次當前溫溼度信息到平臺安全

  • 配置下發
    經過遠程向監測儀下發配置信息，修改溫溼度的告警值微信

  • 遠程控制
    硬件部分具有告警指示燈功能，溫度、溼度值分別達到告警值時，對應的指示燈會亮起並保持常亮，經過遠程指令消除告警狀態熄滅指示燈session

  • 數據存儲（拓展）
    平臺接收到信息後能夠將溫溼度數據存儲，以便進行數據展現、分析dom

  • 數據展現（拓展）
    設備接入平臺後，咱們經過大屏的對實時和歷史數據進行儀表盤、圖表等展現監控，同時可展現告警狀態異步

硬件清單

  1. 樹莓派3B+ 1臺
  2. DHT11溫溼度傳感器 1個
  3. LED指示燈（普通發光二極管） 2個

實現方案

  1. 使用樹莓派+node-red實現硬件控制，預裝Raspian系統的樹莓派自帶node-red，不須要安裝，使用其餘操做系統的樹莓派可能須要單獨安裝一下，關於node-red的介紹和安裝本教程不作詳細介紹了，不瞭解的同窗能夠自行百度學習
  2. 在平臺建立相應的物模型和物影子，獲取設備接入平臺須要的MQTT鏈接信息
  3. 使用樹莓派外接溫溼度傳感器以30s週期實時採集環境溫溼度，並上報到平臺
  4. 設置報警閾值，當溫溼度達到設定值後，樹莓派外接報警指示燈亮起，可經過微信小程序或控制檯遠程消除報警狀態熄滅告警燈
  5. 設置數據自動存儲到TSDB
  6. 配置物可視大屏實時顯示當前溫溼度信息以及歷史數據曲線、溫溼度超限報警信息

操做步驟

建立物模型和設備影子

物模型配置

首先按以下配置信息在控制檯建立一個物模型，物模型中設置了6個屬性，分別表明溫溼度當前值、溫溼度告警指示燈狀態、溫溼度告警閾值，詳細配置以下：

名稱：hygrothermoscope
描述：用於天工平臺能力演示的通用設備

序號 顯示名稱 屬性名稱 數據類型 默認值 單位
1 溫度 temperature number 0.00 ℃
2 溼度 humidity number 0.00 %rh
3 溫度告警 temperature_alarm number 0  
4 溼度告警 humidity_alarm number 0  
5 溫度閾值 temperature_alarm_value number 25 ℃
6 溼度閾值 humidity_alarm_value number 40 %rh

配置頁面如圖：
（控制檯截圖）

物影子配置

建立完物模型後，爲設備建立一個物影子，來得到設備接入天工平臺須要的MQTT鏈接用戶名和密碼，建立成功後注意保存影子的鏈接信息，配置信息以下：

名稱：demo01
描述：——
物模型：hygrothermoscope

配置頁面如圖：
（控制檯截圖)

硬件開發和配置

  • 硬件鏈接

按下表鏈接樹莓派和傳感器、告警指示燈

DHT11電氣參數

電源電壓：3~5.5V（典型值：5V）；

溫度量程：0~50℃，偏差 ±2℃；

溼度量程：20~90%RH，偏差 ±5%RH；

採樣週期：大於等於1秒/次。

元器件 引腳 樹莓派GPIO
DHT11 VDD 5V Power（pin2）
DATA GPIO24（pin18）
GND Ground（pin14）
溫度告警指示燈 正極 GPIO23（pin16）
負極 Ground（pin6）
溼度告警指示燈 正極 GPIO25（pin22）
負極 Ground（pin9）

鏈接後的實物圖：
圖片

  • 程序編寫
    爲了讓整個程序更加便於理解和維護，咱們將程序的各個模塊寫成獨立node-red流程，每一個流程完成獨立的功能，node-red的啓動能夠參考 node-red安裝和啓動教程
    本實踐編寫完成的node-red流程 下載保存 後，可直接導入本身的設備中體驗，只需修改任意MQTT節點中服務端地址、用戶名和密碼便可，具體方法後邊教程有提示。

    流程模塊 描述
    獲取傳感器數據流程 1s週期採集傳感器數據並保存在全局變量中
    獲取配置信息流程 從雲端拉取設備影子做爲配置信息，初始化設備
    上報溫溼度數據流程 30s週期上報溫溼度數據
    告警觸發與上報流程 實時監測溫溼度變化，達到閾值時觸發告警指示燈點亮，並上報當前設備狀態
    接收雲端指令流程 接收雲端下發的溫溼度告警閾值配置、熄滅告警指示燈指令

    • 獲取傳感器數據流程

      • 莓派實時讀取DHT11數據，並存儲在全局變量中，後續上報、告警邏輯均讀取全局變量中存儲的溫溼度數據
        圖片
      • 此處特別注意的一點，rpi-dht11節點不是node-red內置的節點，須要單獨安裝，具體安裝方法可參考 DTH11安裝方法
      • 設置觸發器，樹莓派每1s對溫溼度進行採樣更新，並進行實時告警，上報程序每30s上報一次，這樣就實現了數據採集和上報分離（採集和上報異步）

      • 設置當前溫溼度狀態function節點代碼

        1. global.set('humidity',Number(msg.humidity).toFixed(2))
        2. global.set('temperature',Number(msg.payload).toFixed(2))
        3. return {};

    • 獲取配置信息流程

      • 樹莓派開機聯網後，主動從雲端下載配置信息，初始化溫溼度告警閾值、初始化告警燈狀態
        圖片

      • 先檢測一下消息發佈節點是否就緒，使用get_shadow組裝payload，向$baidu/iot/shadow/demo01/get主題發佈消息，請求得到設備影子，get_shadow function節點代碼

        1. var res={}
        3. var parmars={
        4. "requestId": new Date().getTime(),
        5. }
        6. res.payload=parmars
        7. return res;

      • 對$baidu/iot/shadow/demo01/get主題的訂閱，對應node-red中的MQTT輸出節點，第一次使用時添加該節點到界面內，雙擊配置信息，會要求先選擇mqtt鏈接配置
        圖片
        圖片

      • 點擊服務端右側的 編輯 按鈕新建mqtt客戶端，填寫鏈接信息，服務端地址建立設備時得到的接入地址
        圖片
      • 切換到安全tab下，設置MQTT鏈接用戶名和密碼，用戶名和密碼爲建立設備時得到的用戶名和密碼（特別提醒，下載使用本教程中提供的完整流程時，請務必將此處用戶名和密碼修改成本身設備的用戶名密碼）
        圖片

      • 返回頁面選中剛剛新建的服務端，設置主題爲$baidu/iot/shadow/demo01/get，點擊完成便可完成MQTT客戶端配置，此後再須要使用MQTT節點時，不須要再次配置鏈接信息，只須要設置相應的發佈或訂閱主題便可
        圖片

      • 訂閱$baidu/iot/shadow/demo01/get/accepted主題，接收天工返回的設備影子信息，並使用初始化設備狀態，function節點代碼

        1. global.set('temperature_alarm_value',msg.payload.reported.temperature_alarm_value)
        2. global.set('humidity_alarm_value',msg.payload.reported.humidity_alarm_value)
        3. global.set('humidity_alarm',0)
        4. global.set('temperature_alarm',0)
        5. global.set('humidity',0)
        6. global.set('temperature',0)
        7. global.set('humidity_alarm_has_reported',false)
        8. global.set('temperature_alarm_has_reported',false)
        9. return {};

      • 可同時訂閱$baidu/iot/shadow/demo01/update/rejected主題，調試過程當中，如設備影子請求失敗，會在此接收到消息

    • 上報溫溼度數據

      • 設備初始化完成以後，咱們來實現30s週期上報溫溼度信息到雲端
        圖片

      • 設置觸發器，每30s觸發formate函數執行一次，formate函數會從全局變量中得到當前設備記錄的溫溼度數值，組裝設備影子上報消息，向$baidu/iot/shadow/demo01/update主題發佈更新設備影子信息，formate function代碼

        1. var res={}
        2. var parmars={
        3. "requestId": new Date().getTime(),
        4. "reported": {}
        5. }
        6. parmars.reported.randomnum=Math.random(100)*1000
        7. parmars.reported.temperature=global.get('temperature')
        8. parmars.reported.humidity=global.get('humidity')
        9. res.payload=parmars
        10. return res;
        • 進一步能夠訂閱$baidu/iot/shadow/demo01/update/accepted來接收影子更新的結果

    • 告警觸發與上報

      • 告警是物聯網場景中常見的功能，咱們使用本流程實現溫溼度達到閾值時，設備告警指示燈點亮，同時，設備向雲端發送設備當前狀態信息
        圖片
      • 設置兩個觸發器分別監測溫溼度值是否達到設置的閾值，觸發器以1s週期進行檢測，與設備採集傳感器數據的週期保持一致
      • 以溼度監測爲例，觸發器以全局變量中的humidity（溼度）值爲輸入，經過h_alarm_on函數來計算當前值是否達到閾值，經過switch進行判斷達到閾值即點亮告警燈，同時經過向$baidu/iot/shadow/demo01/update發佈消息，更新設備影子

      • h_alarm_on代碼

        1. var res={}
        2. var turn_on=0
        3. if(global.get('humidity')>global.get('humidity_alarm_value')){
        4. global.set('humidity_alarm',1)
        5. if(global.get('humidity_alarm_has_reported')){
        7. }else{
        8. global.set('humidity_alarm_has_reported',true)
        9. turn_on=1
        10. }
        11. }
        12. res.payload=turn_on
        13. return res;

      • formate代碼

        1. var res={}
        2. var parmars={
        3. "requestId": new Date().getTime(),
        4. "reported": {}
        5. }
        6. parmars.reported.randomnum=Math.random(100)*1000
        7. parmars.reported.temperature=global.get('temperature')
        8. parmars.reported.humidity=global.get('humidity')
        9. parmars.reported.temperature_alarm=global.get('temperature_alarm')
        10. parmars.reported.humidity_alarm=global.get('humidity_alarm')
        11. res.payload=parmars
        12. return res;
    • 接收雲端指令
      • 前邊兩個流程咱們實現了數據上行，接着咱們編寫一個流程來接收雲端下發給設備的指令，實現遠程控制設備
        圖片
      • 經過天工控制檯物影子詳情頁或調用api接口能夠更新設備影子中的‘desired’字段，達到反控設備的目的。物影子在接受到‘desired’字段更新後，會比較’reported’和‘desired’之間的差別，並將diff結果發送到主題’$baidu/iot/shadow/demo01/delta，設備經過訂閱該主題便可實時獲取雲端下發的指令，進行相應的邏輯操做
        圖片
      • 雲端能夠下發指令設置溫溼度閾值、熄滅告警指示燈，使用相應的函數判斷雲端指令類型進行相應的操做
      • 關於設備影子的機制可參考 物影子操做 相關文檔

部署和運行

通過上邊的流程編寫以後，咱們將程序部署到樹莓派中去，只須要點擊頁面右上角的部署，node-red會把咱們編寫的程序自動部署並運行
接着咱們就能夠經過觀察控制檯設備影子數據變化驗證咱們的成果了。
step1：觀察控制檯設備影子數據變化，初始時像這樣，設備開始上報數據了
圖片
step2：簡單粗暴的方式，向傳感器哈氣，固然是用加溼器或電吹風效果更突出，效果是這樣，溫溼度數值增高，報警燈亮起
圖片

遠程下發指令

最後咱們演示一下如何向設備下發指令，下發指令操做咱們使用控制檯提供的下發功能，固然你也能夠經過調用天工提供的api實現，在咱們的demo中設備能夠響應的指令有兩種，一種是控制告警指示燈熄滅，另外一種遠程設置告警閾值。

  • step1：設置告警閾值，打開設備影子詳情頁，點擊編輯按鈕，設置溼度告警閾值爲40
    圖片
  • step2：點擊肯定後，刷新影子狀態，可查看到溼度告警閾值當前值已更新爲40（設備接收到設置指令並設置成功後會上報更新後設備的當前值）
    圖片
  • step3:熄滅告警指示燈，首先咱們經過對DHT11哈氣，觸發告警指示燈亮起
    圖片
  • step4:下發指令熄滅告警燈，咱們將告警指示燈狀態值設置爲0下發給設置點擊肯定後，指示燈熄滅
    圖片

設置數據自動存儲到TSDB

打開demo01物影子詳情頁，切換到物詳情tab，將6個屬性所有設置爲「上報即存儲」，設置以後設備上報的全部數據將自動存儲到咱們設置的TSDB中
圖片

物可視大屏展現

使用物可視大屏將設備數據彙總顯示，關於物可視的使用請閱讀物可視相關文檔，此處咱們直接展現本次基於單臺設備經過拖拉拽零代碼實現的大屏效果，更多效果能夠進一步發掘
圖片

更多控制方法

此外，你也能夠發掘更多的控制方法，好比控制端經過建立MQTT鏈接，向更新設備影子主題發佈包含desired的消息，如下原始控制指令可參考

指令下發topic

  1. $baidu/iot/shadow/demo01/update

設置閾值

  1. {
  2. "requestId":"1234567890",
  3. "desired":{
  4. "humidity_alarm_value":12,
  5. "temperature_alarm_value":24
  6. }
  7. }

消除告警

  1. {
  2. "requestId":"1234567890",
  3. "desired":{
  4. "temperature_alarm":0,
  5. "humidity_alarm":0
  6. }
  7. }

完整node-red流程

複製並粘貼保存爲.json文件，導入你的node-red便可使用（必定要記得修改MQTT節點的信息）

  1. [{"id":"e0b82240.b53ae","type":"tab","label":"獲取環境溫溼度","disabled":false,"info":""},{"id":"79ed18b7.b0cba8","type":"tab","label":"獲取設備影子","disabled":false,"info":""},{"id":"fcc59dc.0f9396","type":"tab","label":"上報設備狀態","disabled":false,"info":""},{"id":"eb9cfc66.b315","type":"tab","label":"指示燈告警","disabled":false,"info":""},{"id":"cc69204f.1129b","type":"tab","label":"接收雲端指令","disabled":false,"info":""},{"id":"876561eb.4dc06","type":"mqtt-broker","z":"","name":"mqtt-demo01","broker":"1cb210f148044b6c8ac45382ef0d9e02.mqtt.iot.gz.baidubce.com","port":"1883","clientid":"demo01","usetls":false,"compatmode":true,"keepalive":"60","cleansession":true,"birthTopic":"","birthQos":"0","birthPayload":"","closeTopic":"","closeQos":"0","closePayload":"","willTopic":"","willQos":"0","willPayload":""},{"id":"aeaf02d5.9bfb","type":"mqtt out","z":"79ed18b7.b0cba8","name":"","topic":"$baidu/iot/shadow/demo01/get","qos":"0","retain":"","broker":"876561eb.4dc06","x":670,"y":60,"wires":[]},{"id":"1c4ebe.2fe0c143","type":"mqtt in","z":"79ed18b7.b0cba8","name":"","topic":"$baidu/iot/shadow/demo01/get/accepted","qos":"0","datatype":"json","broker":"876561eb.4dc06","x":220,"y":160,"wires":[["32f0f23.b929f0e"]]},{"id":"32f0f23.b929f0e","type":"function","z":"79ed18b7.b0cba8","name":"初始化設備","func":"\n\nglobal.set('temperature_alarm_value',msg.payload.reported.temperature_alarm_value)\n\nglobal.set('humidity_alarm_value',msg.payload.reported.humidity_alarm_value)\n\nglobal.set('humidity_alarm',0)\n\nglobal.set('temperature_alarm',0)\n\nglobal.set('humidity',0)\n\nglobal.set('temperature',0)\n\nglobal.set('humidity_alarm_has_reported',false)\n\nglobal.set('temperature_alarm_has_reported',false)\n\n\n\nreturn {};\n\n\n","outputs":1,"noerr":0,"x":520,"y":160,"wires":[["27781181.55b2be"]]},{"id":"27781181.55b2be","type":"debug","z":"79ed18b7.b0cba8","name":"獲取影子成功","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":740,"y":160,"wires":[]},{"id":"ad0d021d.af49f","type":"function","z":"79ed18b7.b0cba8","name":"get_shadow","func":"var res={}\n\nvar parmars={\n \"requestId\": new Date().getTime(),\n}\n\nres.payload=parmars\n\nreturn res;","outputs":1,"noerr":0,"x":370,"y":60,"wires":[["aeaf02d5.9bfb"]]},{"id":"1e5c7528.4ac8eb","type":"status","z":"79ed18b7.b0cba8","name":"","scope":["1c4ebe.2fe0c143"],"x":140,"y":60,"wires":[["ad0d021d.af49f"]]},{"id":"55874635.ff36b8","type":"inject","z":"fcc59dc.0f9396","name":"週期上報","topic":"","payload":"","payloadType":"date","repeat":"30","crontab":"","once":false,"onceDelay":0.1,"x":150,"y":260,"wires":[["464a70e6.efb22","b17d0f7c.856ed"]]},{"id":"464a70e6.efb22","type":"function","z":"fcc59dc.0f9396","name":"formate","func":"var res={}\n\nvar parmars={\n \"requestId\": new Date().getTime(),\n \"reported\": {}\n}\nparmars.reported.randomnum=Math.random(100)*1000\n\nparmars.reported.temperature=global.get('temperature')\n\nparmars.reported.humidity=global.get('humidity')\n\n\nres.payload=parmars\n\nreturn res;","outputs":1,"noerr":0,"x":380,"y":260,"wires":[["a4e7196e.af6578","66b34bbc.208864"]]},{"id":"a4e7196e.af6578","type":"mqtt out","z":"fcc59dc.0f9396","name":"","topic":"$baidu/iot/shadow/demo01/update","qos":"0","retain":"","broker":"876561eb.4dc06","x":720,"y":260,"wires":[]},{"id":"bcdb86b3.317e38","type":"rpi-gpio out","z":"cc69204f.1129b","name":"溫度告警燈","pin":"16","set":true,"level":"0","freq":"","out":"out","x":650,"y":200,"wires":[]},{"id":"41b5ee5b.2e3fa","type":"mqtt out","z":"cc69204f.1129b","name":"","topic":"$baidu/iot/shadow/demo01/update","qos":"0","retain":"","broker":"876561eb.4dc06","x":980,"y":320,"wires":[]},{"id":"1b30c52e.29897b","type":"function","z":"cc69204f.1129b","name":"t_alarm_off","func":"\nvar res={}\nvar turn_on=0\n\nif(msg.payload.desired.temperature_alarm==1){\n turn_on=1\n}\nres.payload=turn_on\n\nreturn res;","outputs":1,"noerr":0,"x":390,"y":160,"wires":[["479a6a71.773114"]]},{"id":"8a6175a2.3e85a8","type":"function","z":"cc69204f.1129b","name":"h_alarm_off","func":"var res={}\nvar turn_on=0\n\nif(msg.payload.desired.humidity_alarm==1){\n turn_on=1\n}\n\n\nres.payload=turn_on\n\nreturn res;","outputs":1,"noerr":0,"x":390,"y":280,"wires":[["d9c514fd.bd0d88"]]},{"id":"4fab39be.a5d838","type":"rpi-gpio out","z":"cc69204f.1129b","name":"溼度告警燈","pin":"22","set":true,"level":"0","freq":"","out":"out","x":650,"y":280,"wires":[]},{"id":"67b64145.91291","type":"mqtt in","z":"cc69204f.1129b","name":"","topic":"$baidu/iot/shadow/demo01/delta","qos":"0","datatype":"json","broker":"876561eb.4dc06","x":150,"y":280,"wires":[["1b30c52e.29897b","8a6175a2.3e85a8","c2f39cb9.96667","4f0b2611.ff8238"]]},{"id":"8b3c3146.b77f2","type":"function","z":"cc69204f.1129b","name":"t_alarm_reported","func":"\nvar res={}\nglobal.set('temperature_alarm',0)\nglobal.set('temperature_alarm_has_reported',false)\n\nvar parmars={\n \"requestId\": new Date().getTime(),\n \"reported\": {}\n}\nparmars.reported.randomnum=Math.random(100)*1000\n\nparmars.reported.temperature_alarm=msg.payload==1?1:0\n\n\nres.payload=parmars\n\nreturn res;","outputs":1,"noerr":0,"x":670,"y":160,"wires":[["41b5ee5b.2e3fa","c207e56d.a67738"]]},{"id":"67886b16.9d5274","type":"function","z":"cc69204f.1129b","name":"h_alarm_reported","func":"\n\nvar res={}\nglobal.set('humidity_alarm',0)\nglobal.set('humidity_alarm_has_reported',false)\nvar parmars={\n \"requestId\": new Date().getTime(),\n \"reported\": {}\n}\nparmars.reported.randomnum=Math.random(100)*1000\n\nparmars.reported.humidity_alarm=msg.payload==1?1:0\n\n\nres.payload=parmars\n\nreturn res;","outputs":1,"noerr":0,"x":670,"y":320,"wires":[["41b5ee5b.2e3fa","c207e56d.a67738"]]},{"id":"4ff05547.39024c","type":"function","z":"cc69204f.1129b","name":"set_alarm","func":"var parmars={\n \"requestId\": new Date().getTime(),\n \"reported\": {\n temperature_alarm_value:global.get('temperature_alarm_value')||100,\n humidity_alarm_value:global.get('humidity_alarm_value')||100\n }\n}\n\nif(msg.payload.desired.temperature_alarm_value){\n global.set('temperature_alarm_value',msg.payload.desired.temperature_alarm_value)\n parmars.reported.temperature_alarm_value=msg.payload.desired.temperature_alarm_value\n}\n\nif(msg.payload.desired.humidity_alarm_value ){\n global.set('humidity_alarm_value',msg.payload.desired.humidity_alarm_value) \n parmars.reported.humidity_alarm_value=msg.payload.desired.humidity_alarm_value\n}\n\n\nmsg.payload=parmars\n\nreturn msg;","outputs":1,"noerr":0,"x":640,"y":420,"wires":[["41b5ee5b.2e3fa","c207e56d.a67738"]]},{"id":"d9c514fd.bd0d88","type":"switch","z":"cc69204f.1129b","name":"","property":"payload","propertyType":"msg","rules":[{"t":"eq","v":"0","vt":"str"}],"checkall":"true","repair":false,"outputs":1,"x":410,"y":320,"wires":[["67886b16.9d5274","4fab39be.a5d838"]]},{"id":"479a6a71.773114","type":"switch","z":"cc69204f.1129b","name":"","property":"payload","propertyType":"msg","rules":[{"t":"eq","v":"0","vt":"str"}],"checkall":"true","repair":false,"outputs":1,"x":410,"y":200,"wires":[["8b3c3146.b77f2","bcdb86b3.317e38"]]},{"id":"c2f39cb9.96667","type":"function","z":"cc69204f.1129b","name":"if_set_alarm","func":"\nvar parmars=msg.payload.desired.hasOwnProperty(\"temperature_alarm_value\")||msg.payload.desired.hasOwnProperty(\"humidity_alarm_value\")\n\nmsg.to_set=parmars\n\nreturn msg;","outputs":1,"noerr":0,"x":390,"y":380,"wires":[["bdaa5c71.ca261"]]},{"id":"bdaa5c71.ca261","type":"switch","z":"cc69204f.1129b","name":"","property":"to_set","propertyType":"msg","rules":[{"t":"true"}],"checkall":"true","repair":false,"outputs":1,"x":410,"y":420,"wires":[["4ff05547.39024c"]]},{"id":"8b4e4b3d.6d7ae8","type":"mqtt in","z":"fcc59dc.0f9396","name":"","topic":"$baidu/iot/shadow/demo01/update/accepted","qos":"0","datatype":"json","broker":"876561eb.4dc06","x":230,"y":400,"wires":[["66b34bbc.208864"]]},{"id":"66b34bbc.208864","type":"debug","z":"fcc59dc.0f9396","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":630,"y":400,"wires":[]},{"id":"ca8cd639.9a4258","type":"debug","z":"79ed18b7.b0cba8","name":"獲取影子失敗","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":540,"y":260,"wires":[]},{"id":"a9da906e.29bde","type":"mqtt in","z":"79ed18b7.b0cba8","name":"","topic":"$baidu/iot/shadow/demo01/update/rejected","qos":"0","datatype":"json","broker":"876561eb.4dc06","x":230,"y":260,"wires":[["ca8cd639.9a4258"]]},{"id":"2981152c.63017a","type":"rpi-dht22","z":"e0b82240.b53ae","name":"讀DHT11數據","topic":"rpi-dht11","dht":"11","pintype":"0","pin":"18","x":400,"y":240,"wires":[["a2c9546.eeb9ca8","b835ff81.33c0c"]]},{"id":"a2c9546.eeb9ca8","type":"function","z":"e0b82240.b53ae","name":"設置設備當前溫溼度狀態","func":"\nglobal.set('humidity',Number(msg.humidity).toFixed(2))\nglobal.set('temperature',Number(msg.payload).toFixed(2))\n\nreturn {};","outputs":1,"noerr":0,"x":630,"y":240,"wires":[["c3c0dca4.3972d"]]},{"id":"6662a21c.a9726c","type":"inject","z":"e0b82240.b53ae","name":"週期觸發器","topic":"","payload":"","payloadType":"date","repeat":"1","crontab":"","once":false,"onceDelay":0.1,"x":210,"y":240,"wires":[["2981152c.63017a"]]},{"id":"cb542070.5ebac","type":"rpi-gpio out","z":"eb9cfc66.b315","name":"溫度告警燈","pin":"16","set":true,"level":"0","freq":"","out":"out","x":790,"y":420,"wires":[]},{"id":"aecdb85d.c5d758","type":"rpi-gpio out","z":"eb9cfc66.b315","name":"溼度告警燈","pin":"22","set":true,"level":"0","freq":"","out":"out","x":790,"y":240,"wires":[]},{"id":"3da13ab1.337fb6","type":"inject","z":"eb9cfc66.b315","name":"","topic":"","payload":"humidity","payloadType":"global","repeat":"1","crontab":"","once":false,"onceDelay":0.1,"x":230,"y":240,"wires":[["85ca2d2.6cbc7d"]]},{"id":"69c07bf5.efa0c4","type":"inject","z":"eb9cfc66.b315","name":"","topic":"","payload":"temperature","payloadType":"global","repeat":"1","crontab":"","once":false,"onceDelay":0.1,"x":240,"y":420,"wires":[["72da2f99.47e7b"]]},{"id":"65a20d4f.e76724","type":"mqtt out","z":"eb9cfc66.b315","name":"","topic":"$baidu/iot/shadow/demo01/update","qos":"0","retain":"","broker":"876561eb.4dc06","x":1060,"y":360,"wires":[]},{"id":"72da2f99.47e7b","type":"function","z":"eb9cfc66.b315","name":"t_alarm_on","func":"var res={}\nvar turn_on=0\n\n\n\nif(global.get('temperature')>global.get('temperature_alarm_value')){\n\n if(global.get('temperature_alarm_has_reported')){\n\n}else{\n global.set('temperature_alarm_has_reported',true) \n turn_on=1\n}\n}\nres.payload=turn_on\n\nreturn res;","outputs":1,"noerr":0,"x":450,"y":420,"wires":[["7066ca16.508d64"]]},{"id":"85ca2d2.6cbc7d","type":"function","z":"eb9cfc66.b315","name":"h_alarm_on","func":"\nvar res={}\nvar turn_on=0\nif(global.get('humidity')>global.get('humidity_alarm_value')){\n global.set('humidity_alarm',1)\n if(global.get('humidity_alarm_has_reported')){\n \n }else{\n global.set('humidity_alarm_has_reported',true)\n turn_on=1\n }\n}\nres.payload=turn_on\nreturn res;","outputs":1,"noerr":0,"x":450,"y":240,"wires":[["4dd08a6c.87ecc4"]]},{"id":"7066ca16.508d64","type":"switch","z":"eb9cfc66.b315","name":"","property":"payload","propertyType":"msg","rules":[{"t":"eq","v":"1","vt":"str"}],"checkall":"true","repair":false,"outputs":1,"x":610,"y":420,"wires":[["cb542070.5ebac","c83ff371.eaa0e"]]},{"id":"4dd08a6c.87ecc4","type":"switch","z":"eb9cfc66.b315","name":"","property":"payload","propertyType":"msg","rules":[{"t":"eq","v":"1","vt":"str"}],"checkall":"true","repair":false,"outputs":1,"x":610,"y":240,"wires":[["aecdb85d.c5d758","c83ff371.eaa0e"]]},{"id":"c3c0dca4.3972d","type":"debug","z":"e0b82240.b53ae","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":850,"y":240,"wires":[]},{"id":"c83ff371.eaa0e","type":"function","z":"eb9cfc66.b315","name":"formate","func":"var res={}\n\nvar parmars={\n \"requestId\": new Date().getTime(),\n \"reported\": {}\n}\nparmars.reported.randomnum=Math.random(100)*1000\n\nparmars.reported.temperature=global.get('temperature')\n\nparmars.reported.humidity=global.get('humidity')\n\nparmars.reported.temperature_alarm=global.get('temperature_alarm')\n\nparmars.reported.humidity_alarm=global.get('humidity_alarm')\n\n\nres.payload=parmars\n\nreturn res;","outputs":1,"noerr":0,"x":780,"y":340,"wires":[["65a20d4f.e76724","c3d36c20.b83a6"]]},{"id":"c3d36c20.b83a6","type":"debug","z":"eb9cfc66.b315","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":990,"y":280,"wires":[]},{"id":"4f0b2611.ff8238","type":"debug","z":"cc69204f.1129b","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":390,"y":520,"wires":[]},{"id":"c207e56d.a67738","type":"debug","z":"cc69204f.1129b","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":930,"y":220,"wires":[]},{"id":"b835ff81.33c0c","type":"change","z":"e0b82240.b53ae","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"100","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":630,"y":400,"wires":[["a490710e.a86f7"]]},{"id":"a490710e.a86f7","type":"debug","z":"e0b82240.b53ae","name":"測試change","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":890,"y":400,"wires":[]},{"id":"b17d0f7c.856ed","type":"change","z":"fcc59dc.0f9396","name":"組裝數據","rules":[{"t":"set","p":"payload.requestId","pt":"msg","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":380,"y":140,"wires":[["791b173b.086ba8"]]},{"id":"791b173b.086ba8","type":"debug","z":"fcc59dc.0f9396","name":"組裝數據結果","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":680,"y":140,"wires":[]}]

原文連接地址：https://developer.baidu.com/topic/show/290746

相關文章
相關標籤/搜索
每日一句
    每一个你不满意的现在，都有一个你没有努力的曾经。
本站公眾號
   歡迎關注本站公眾號,獲取更多信息
聯繫我們 最近搜索 最新文章 沪ICP备13005482号-10 MyBatis教程 SQL 教程 MySQL教程 Java 教程 Thymeleaf 教程 Hibernate教程 Spring教程 Redis教程