1、保证在微信公众平台配置socket合法域名

2、项目中使用mqtt

建议在package.json中配置"mqtt": “4.1.0”，使用这个版本的依赖
页面中引入mqtt并配置连接

// @ts-ignoreimport * as mqtt from 'mqtt/dist/mqtt.js'; //要使用这里面的const state = reactive({client: null as any,timeCount: 0,mqttConnected: false,});// 连接mqttconst connectMqtt = () => {if(state.mqttConnected) return;const options = {connectTimeout: 4000,clientId: 'xxx',username: 'xxx',password: 'xxxx',port: 8084,};// 微信小程序中要使用wxs,不能使用wss://state.client = mqtt.connect('wxs://xxxxxx/mqtt', options);state.client.on('connect', () => {console.log('mqtt connect success');state.mqttConnected = true; });subscribe();state.client.on('error', (err:any) => {console.log('mqtt connect error', err);});state.client.on('message', (topic: any, message:any) => {console.log('mqtt receive message', topic, message);publish ();});}// 取消订阅主题const unsubscribe = () => {state.client.unsubscribe('/xxx/xxx', (err:any) => {if (err) {console.error(err);// un.toast('订阅失败')} else {console.log('unsubscribe to topic');}});}// 订阅主题const subscribe = () => {state.client.subscribe('/xxx/xxxx', (err:any) => {if (err) {console.error(err);// un.toast('订阅失败')} else {console.log('Subscribed to topic');}});}// 发布信息const publish = () => {if(state.client) {state.client.publish('/xx/xxx', 'Hello, MQTT!', {qos: 2}, (err:any) => {if(!err) {console.log("发布信息成功")}})return}}// 断开mqtt连接const disconnectMqtt = () => {console.log(state.mqttConnected)if(state.mqttConnected && state.client) {unsubscribe();state.client.end(true);state.mqttConnected = false;state.client = null;}}