{"id":27371,"date":"2024-04-07T17:14:01","date_gmt":"2024-04-07T09:14:01","guid":{"rendered":"https:\/\/www.modbus.cn\/?post_type=docs&#038;p=27371"},"modified":"2024-04-07T17:17:06","modified_gmt":"2024-04-07T09:17:06","password":"","slug":"node-js","status":"publish","type":"docs","link":"https:\/\/www.modbus.cn\/en\/docs\/node-js","title":{"rendered":"Node.js\u901a\u8fc7MQTT\u63a5\u5165\u793a\u4f8b"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\" id=\"szW6N\">\u6982\u8ff0<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u93af7f38\">\u672c\u6587\u4ee5Node.js\u4e3a\u4f8b\uff0c\u4ecb\u7ecd\u901a\u8fc7MQTTS\/MQTT\u534f\u8bae\u63a5\u5165\u5e73\u53f0\uff0c\u57fa\u4e8e\u5e73\u53f0\u63a5\u53e3\u5b9e\u73b0\u201c\u5c5e\u6027\u4e0a\u62a5\u201d\u3001\u201c\u8ba2\u9605\u63a5\u6536\u547d\u4ee4\u201d\u7b49\u529f\u80fd\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u09fd214c\"><strong>\u8bf4\u660e\uff1a<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u885f45c3\">\u672c\u6587\u4e2d\u4f7f\u7528\u7684\u4ee3\u7801\u4e3a\u6837\u4f8b\u4ee3\u7801\uff0c\u4ec5\u7528\u4e8e\u4f53\u9a8c\u5e73\u53f0\u901a\u4fe1\u529f\u80fd\uff0c\u5982\u9700\u8fdb\u884c\u5546\u7528\uff0c\u53ef\u4ee5\u53c2\u8003<a href=\"https:\/\/support.huaweicloud.com\/devg-iothub\/iot_02_1004.html\" target=\"_blank\" rel=\"noopener noreferrer nofollow noreferrer noopener\">\u8d44\u6e90\u83b7\u53d6<\/a>\u83b7\u53d6\u5bf9\u5e94\u8bed\u8a00\u7684IoT Device SDK\u8fdb\u884c\u96c6\u6210\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"tciwr\">\u524d\u63d0\u6761\u4ef6<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5df2\u5b89\u88c5Node.js\uff0c\u82e5\u672a\u5b89\u88c5\u8bf7\u53c2\u8003<a href=\"https:\/\/support.huaweicloud.com\/devg-iothub\/iot_02_2133.html#ZH-CN_TOPIC_0232966960__section448405171017\" target=\"_blank\" rel=\"noopener noreferrer nofollow noreferrer noopener\">\u5b89\u88c5Node.js<\/a>\u3002<\/li>\n\n\n\n<li>\u5df2\u5728\u7ba1\u7406\u63a7\u5236\u53f0\u83b7\u53d6\u8bbe\u5907\u63a5\u5165\u5730\u5740\u3002\u83b7\u53d6\u5730\u5740\u7684\u64cd\u4f5c\u6b65\u9aa4\uff0c\u8bf7\u53c2\u8003\u5e73\u53f0\u5bf9\u63a5\u4fe1\u606f\u3002<\/li>\n\n\n\n<li>\u5df2\u5728\u7ba1\u7406\u63a7\u5236\u53f0\u521b\u5efa\u4ea7\u54c1\u548c\u8bbe\u5907\u3002\u521b\u5efa\u4ea7\u54c1\u548c\u8bbe\u5907\u7684\u5177\u4f53\u64cd\u4f5c\u7ec6\u8282\uff0c\u8bf7\u53c2\u8003\u521b\u5efa\u4ea7\u54c1\u3001\u6ce8\u518c\u5355\u4e2a\u8bbe\u5907\u6216\u6279\u91cf\u6ce8\u518c\u8bbe\u5907\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"mXvKT\">\u51c6\u5907\u5de5\u4f5c<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5b89\u88c5Node.js\u8bbf\u95ee<a href=\"https:\/\/nodejs.org\/en\/download\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow noreferrer noopener\">Node.js\u5b98\u7f51<\/a>\uff0c\u9009\u62e9\u5408\u9002\u7cfb\u7edf\u7684\u7248\u672c\u4e0b\u8f7d\u3002\uff08\u672c\u6587\u4ee5windows 64-bit\u7cfb\u7edf\uff0cNode.js\u7248\u672cv12.18.0\uff08npm 6.14.4\uff09\u4e3a\u4f8b\uff09\u3002<img decoding=\"async\" src=\"https:\/\/image.modbus.cn\/wp-content\/uploads\/2024\/04\/20240407171402955.png\" style=\"width: 750px;\" loading=\"lazy\" title=\"Node.js\u901a\u8fc7MQTT\u63a5\u5165\u793a\u4f8b\u63d2\u56fe\" alt=\"Node.js\u901a\u8fc7MQTT\u63a5\u5165\u793a\u4f8b\u63d2\u56fe\" \/><\/li>\n\n\n\n<li>\u4e0b\u8f7d\u5b8c\u6210\u540e\uff0c\u8fd0\u884c\u5b89\u88c5\u6587\u4ef6\uff0c\u6839\u636e\u754c\u9762\u63d0\u793a\u5b89\u88c5\u3002<\/li>\n\n\n\n<li>\u68c0\u67e5Node.js\u662f\u5426\u5b89\u88c5\u6210\u529f\u3002Win\u952e + r &#8211;&gt;\u8f93\u5165 cmd&#8211;&gt;\u56de\u8f66\uff0c\u8fdb\u5165\u547d\u4ee4\u884c\u7a97\u53e3\u3002\u8f93\u5165node \u2013v\uff0c\u56de\u8f66\u540e\u663e\u793aNode.js\u7248\u672c\uff0c\u8f93\u5165npm -v\u663e\u793a\u7248\u672c\u4fe1\u606f\uff0c\u5373\u8868\u793a\u5b89\u88c5\u6210\u529f<\/li>\n<\/ol>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre class=\"CodeMirror\" data-setting=\"{&quot;showPanel&quot;:true,&quot;languageLabel&quot;:&quot;language&quot;,&quot;fullScreenButton&quot;:true,&quot;copyButton&quot;:true,&quot;mode&quot;:&quot;javascript&quot;,&quot;mime&quot;:&quot;text\/javascript&quot;,&quot;theme&quot;:&quot;3024-night&quot;,&quot;lineNumbers&quot;:false,&quot;styleActiveLine&quot;:false,&quot;lineWrapping&quot;:false,&quot;readOnly&quot;:true,&quot;fileName&quot;:&quot;JavaScript&quot;,&quot;TrpContentRestriction&quot;:{&quot;restriction_type&quot;:&quot;exclude&quot;,&quot;selected_languages&quot;:[],&quot;panel_open&quot;:true},&quot;language&quot;:&quot;JavaScript&quot;,&quot;maxHeight&quot;:&quot;400px&quot;,&quot;modeName&quot;:&quot;js&quot;}\">const mqtt = require('mqtt')\nconst fs = require('fs');\n\n\/\/ MQTT \u670d\u52a1\u5668\u5730\u5740\nconst MQTT_BROKER = &quot;iot.modbus.cn&quot;;\n\/\/ MQTT \u7aef\u53e3\u53f7\nconst MQTT_PORT = 1883;\n\/\/ MQTT \u5ba2\u6237\u7aef ID\nconst MQTT_CLIENT_ID = &quot;4QR8TZ9ThuL4G&quot;;\n\/\/ MQTT \u7528\u6237\u540d\nconst MQTT_USERNAME = &quot;ceshi&quot;;\n\/\/ MQTT \u5bc6\u7801\nconst MQTT_PASSWORD = &quot;123456&quot;;\n\/\/ \u8ba2\u9605\u7684\u4e3b\u9898\nconst MQTT_TOPIC_SUBSCRIBE = &quot;\/server\/coo\/4QR8TZ9ThuL4G&quot;;\n\/\/ \u53d1\u5e03\u7684\u4e3b\u9898\nconst MQTT_TOPIC_PUBLISH = &quot;\/dev\/coo\/4QR8TZ9ThuL4G&quot;;\n\n\/\/ \u521b\u5efa MQTT \u5ba2\u6237\u7aef\nconst client = mqtt.connect({\n    host: MQTT_BROKER,\n    port: MQTT_PORT,\n    clientId: MQTT_CLIENT_ID,\n    username: MQTT_USERNAME,\n    password: MQTT_PASSWORD\n});\n\n\/\/ \u8fde\u63a5\u6210\u529f\u56de\u8c03\u51fd\u6570\nclient.on('connect', function () {\n    console.log(&quot;Connected with result code &quot; + MQTT_CLIENT_ID);\n    \/\/ \u8ba2\u9605\u4e3b\u9898\n    client.subscribe(MQTT_TOPIC_SUBSCRIBE);\n});\n\n\/\/ \u63a5\u6536\u6d88\u606f\u56de\u8c03\u51fd\u6570\nclient.on('message', function (topic, message) {\n    console.log(`Received message: ${topic} ${message.toString()}`);\n});\n\n\/\/ \u53d1\u5e03\u6d88\u606f\nfunction publishMessage(client, topic, payload) {\n    client.publish(topic, payload);\n}\n\n\/\/ \u5fc3\u8df3\u51fd\u6570\nfunction sendHeartbeat() {\n    console.log(&quot;Sending heartbeat&quot;);\n    \/\/ \u53d1\u9001\u5fc3\u8df3\u6d88\u606f\n    publishMessage(client, MQTT_TOPIC_PUBLISH, &quot;heartbeat&quot;);\n    \/\/ \u5b9a\u65f6\u8c03\u7528\u81ea\u8eab\n    setTimeout(sendHeartbeat, 60 * 1000);\n}\n\n\/\/ \u5b9a\u65f6\u4e0a\u62a5\u51fd\u6570\nfunction reportData() {\n    console.log(&quot;Reporting data&quot;);\n    \/\/ \u5f85\u4e0a\u62a5\u7684\u6570\u636e\n    const message = [\n    { &quot;sensor_device_id&quot;: 1, &quot;port_id&quot;: 1, &quot;sdata&quot;: 33 },\n    { &quot;sensor_device_id&quot;: 1, &quot;port_id&quot;: 2, &quot;sdata&quot;: 60 }\n];\nconst payload = JSON.stringify(message);\n\/\/ \u53d1\u5e03\u6570\u636e\npublishMessage(client, MQTT_TOPIC_PUBLISH, payload);\n\/\/ \u5b9a\u65f6\u8c03\u7528\u81ea\u8eab\nsetTimeout(reportData, 10 * 1000);\n}\n\n\/\/ \u542f\u52a8\u5fc3\u8df3\u5b9a\u65f6\u5668\nsendHeartbeat();\n\n\/\/ \u542f\u52a8\u5b9a\u65f6\u4e0a\u62a5\u5b9a\u65f6\u5668\nreportData();<\/pre><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>require('mqtt')<\/code>\uff1a\u5f15\u5165\u4e86 mqtt \u5e93\uff0c\u7528\u4e8e\u63d0\u4f9b MQTT \u5ba2\u6237\u7aef\u7684\u529f\u80fd\u3002\u8fd9\u662f\u4e00\u4e2a MQTT \u5ba2\u6237\u7aef\u6a21\u5757\uff0c\u7528\u4e8e Node.js \u5e94\u7528\u7a0b\u5e8f\u3002<\/li>\n\n\n\n<li><code>require('fs')<\/code>\uff1a\u5f15\u5165\u4e86 fs \u5e93\uff0c\u7528\u4e8e\u5904\u7406\u6587\u4ef6\u7cfb\u7edf\u64cd\u4f5c\u3002\u5728\u672c\u793a\u4f8b\u4e2d\uff0c\u5b83\u5e76\u672a\u4f7f\u7528\u3002<\/li>\n\n\n\n<li>\u58f0\u660e\u548c\u521d\u59cb\u5316\u4e00\u4e9b\u5168\u5c40\u5e38\u91cf\uff0c\u6bd4\u5982 MQTT \u670d\u52a1\u5668\u7684\u5730\u5740\u3001\u7aef\u53e3\u53f7\u3001\u5ba2\u6237\u7aefID\u3001\u7528\u6237\u540d\u3001\u5bc6\u7801\u4ee5\u53ca\u7528\u4e8e\u8ba2\u9605\u548c\u53d1\u5e03\u7684\u4e3b\u9898\u3002<\/li>\n\n\n\n<li>\u4f7f\u7528 <code>mqtt.connect()<\/code> \u65b9\u6cd5\u8fde\u63a5\u5230 MQTT \u670d\u52a1\u5668\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u9700\u8981\u63d0\u4f9b\u670d\u52a1\u5668\u7684\u5730\u5740\u3001\u7aef\u53e3\u53f7\u3001\u5ba2\u6237\u7aefID\u3001\u7528\u6237\u540d\u548c\u5bc6\u7801\u3002<\/li>\n\n\n\n<li>\u4f7f\u7528 <code>client.on('connect', callback)<\/code> \u65b9\u6cd5\u8bbe\u7f6e\u5f53\u8fde\u63a5\u6210\u529f\u65f6\u7684\u56de\u8c03\u51fd\u6570\uff0c\u8fd9\u4e2a\u51fd\u6570\u4f1a\u8ba2\u9605 MQTT \u670d\u52a1\u5668\u7684\u4e00\u4e2a\u4e3b\u9898\u3002<\/li>\n\n\n\n<li>\u4f7f\u7528 <code>client.on('message', callback)<\/code> \u65b9\u6cd5\u8bbe\u7f6e\u5f53\u63a5\u6536\u5230\u6d88\u606f\u65f6\u7684\u56de\u8c03\u51fd\u6570\uff0c\u8fd9\u4e2a\u51fd\u6570\u4f1a\u6253\u5370\u51fa\u63a5\u6536\u5230\u7684\u6d88\u606f\u3002<\/li>\n\n\n\n<li><code>publishMessage()<\/code> \u51fd\u6570\u7528\u4e8e\u53d1\u5e03\u6d88\u606f\u5230 MQTT \u670d\u52a1\u5668\u7684\u6307\u5b9a\u4e3b\u9898\u3002<\/li>\n\n\n\n<li><code>sendHeartbeat()<\/code> \u51fd\u6570\u7528\u4e8e\u5b9a\u671f\u5411 MQTT \u670d\u52a1\u5668\u53d1\u9001\u5fc3\u8df3\u6d88\u606f\uff0c\u7528\u4e8e\u544a\u77e5\u670d\u52a1\u5668\u5ba2\u6237\u7aef\u8fd8\u5728\u7ebf\u3002<\/li>\n\n\n\n<li><code>reportData()<\/code> \u51fd\u6570\u7528\u4e8e\u5b9a\u671f\u5411 MQTT \u670d\u52a1\u5668\u4e0a\u62a5\u6570\u636e\u3002<\/li>\n\n\n\n<li><code>setTimeout(function, delay)<\/code> \u7528\u4e8e\u8bbe\u7f6e\u5b9a\u65f6\u5668\uff0c<code>function<\/code> \u662f\u5b9a\u65f6\u5668\u89e6\u53d1\u65f6\u9700\u8981\u6267\u884c\u7684\u51fd\u6570\uff0c<code>delay<\/code> \u662f\u89e6\u53d1\u5b9a\u65f6\u5668\u7684\u5ef6\u8fdf\u65f6\u95f4\uff0c\u5355\u4f4d\u662f\u6beb\u79d2\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"u6eb91a6d\">\u5728\u8fd0\u884c\u8be5\u793a\u4f8b\u4e4b\u524d\uff0c\u9700\u8981\u786e\u4fdd\u5df2\u7ecf\u5b89\u88c5\u4e86 <code>mqtt<\/code> \u5e93\u3002\u5982\u679c\u8fd8\u672a\u5b89\u88c5\uff0c\u53ef\u4ee5\u4f7f\u7528 npm \u5b89\u88c5\uff0c\u8fd0\u884c\u547d\u4ee4 <code>npm install mqtt<\/code>\u3002<\/p>\n<span id=\"magicpostMarker\"><\/span>","protected":false},"excerpt":{"rendered":"<p>\u6982\u8ff0 \u672c\u6587\u4ee5Node.js\u4e3a\u4f8b\uff0c\u4ecb\u7ecd\u901a\u8fc7MQTTS\/MQTT&#8230;<\/p>","protected":false},"author":1,"featured_media":27372,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":"","_members_access_role":[],"_members_access_error":""},"doc_category":[1921],"doc_tag":[],"class_list":["post-27371","docs","type-docs","status-publish","has-post-thumbnail","hentry","doc_category-mqtt-access"],"year_month":"2026-07","word_count":276,"total_views":0,"reactions":{"happy":0,"normal":0,"sad":0},"author_info":{"name":"modbus\u6280\u672f\u56e2\u961f","author_nicename":"ckhr","author_url":"https:\/\/www.modbus.cn\/en\/profile\/1"},"doc_category_info":[{"term_name":"\u8bbe\u5907 MQTT \u63a5\u5165","term_url":"https:\/\/www.modbus.cn\/en\/docs-category\/mqtt-access"}],"doc_tag_info":[],"_links":{"self":[{"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/docs\/27371","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/comments?post=27371"}],"version-history":[{"count":0,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/docs\/27371\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/media\/27372"}],"wp:attachment":[{"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/media?parent=27371"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/doc_category?post=27371"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/www.modbus.cn\/en\/wp-json\/wp\/v2\/doc_tag?post=27371"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}