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92 lines
2.1 KiB
Markdown
92 lines
2.1 KiB
Markdown
2 years ago
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---
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icon: edit
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date: 2022-12-26
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category:
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- nodejs
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tag:
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- mqtt
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headerDepth: 5
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---
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# nodejs 运行 mqtt
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npm 安装 mqtt
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```shell
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npm install -g mqtt
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```
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客户端
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```js
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var mqtt = require('mqtt');
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//var process = require('process');
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var client = mqtt.connect('mqtt://192.168.3.254:1883', {
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username: "admin",
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password: "public",
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clientId: 'client9'
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});
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function getYYYYMMDDhhmmssByDate() {
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let date = new Date();
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let value = date.getFullYear() * 10000000000 +
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(date.getMonth() + 1) * 100000000 +
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date.getDate() * 1000000 +
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date.getHours() * 10000 +
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date.getMinutes() * 100 +
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date.getSeconds();
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return value;
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};
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client.on('connect', function() {
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console.log("connect success");
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client.subscribe('/server/task/roleId/1/update_task_data');
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client.subscribe('/server/task/roleId/1/setValue');
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});
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client.on('message', function(topic, message, packet) {
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console.log(" ");
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console.log(process.env.JAVA_HOME);
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console.log("time: ", getYYYYMMDDhhmmssByDate());
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var jsonStr = message.toString()
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console.log("jsonStr: " + jsonStr);
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console.log(" ");
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});
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```
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服务端
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```js
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var mqtt = require('mqtt');
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var client = mqtt.connect('mqtt://192.168.3.254:1883', {
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username: 'admin',
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password: 'public',
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clientId: 'server1'
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});
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function getJsonStr() {
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return JSON.stringify({
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"event": "update_task_data",
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"data": {
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"arrTaskId": [],
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"arrTaskInst": [{
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"id": 1,
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"roleId": 1,
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"moduleId": "0",
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"userId": 0,
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"taskId": 9999,
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"finish": 0,
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"taskNodeId": 15,
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"taskNodeStatus": 0,
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"taskNodeStartTime": 20210811,
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"beforeNodeId": 14
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}]
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},
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"open": (Math.round(Math.random())+1)*10,
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"state": (Math.round(Math.random())+1)*10,
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});
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}
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// 推送的频道和数据
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setInterval(() => {
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client.publish("/server/task/roleId/1/update_task_data", getJsonStr(), {qos: 2, retain: false});
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}, 5000)
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```
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