原因：模拟器上测试可以，选中了不校验合法域名，真机调试没能连接服务器，解决思路换了个mqtt.js
可参考
https://unpkg.com/[email protected]/dist/mqtt.min.js
废话不多说！上代码
前端部分自己改改就可以用了，我懒得改了
微信小程序index.wxml
<view style="width: 750rpx;height:330rpx;">
<image src="https://img-blog.csdnimg.cn/295062b06acc4f94b73cae854ee15d5f.png" style="width: 750rpx;height:330rpx;"></image>
</view>
<view style="width: 750rpx;height:800rpx;display: flex;flex-direction: column;justify-content: center;justify-items: center;background-color: royalblue;">
<!-- 开关 -->
<view style="background-color: salmon;width: 750rpx;height: 400rpx;display: flex;flex-direction: row;padding-top: 10rpx;">
<button type="warn" style="width: 180rpx;height: 80rpx;" bindtap="public" data-id="1">打开</button>
<button type="warn" style="width: 180rpx;height: 80rpx;" bindtap="public" data-id="0">关闭</button>
</view>
<!-- 状态 -->
<view style="background-color: rgb(216, 184, 181);width: 750rpx;height: 400rpx;display: flex;flex-direction: column;font-size: larger;color: seashell;font-weight: 1000;">
<text>状态：{
{
state}}</text>
<text>位置：</text>
</view>
</view>
index.js
// index.js
import mqtt from '../../utils/mqtt.js' //引入mqtt
// import mqtt from '../../utils/mqtt.js';
let client = null;
// 获取应用实例
const app = getApp()
Page({
data: {
state:'未连接..'
},
public:function(ee){
//消息发送
console.log(ee.currentTarget.dataset.id);
// 发布消息
client.publish('pop', ee.currentTarget.dataset.id);
wx.showToast({
title: '请求成功',
icon:'none'
})
},
connectMqtt: function() {
var clinet_id = parseInt(Math.random() * 100 + 888888888, 10);
console.log('wx_' + clinet_id);
const options = {
connectTimeout: 4000, // 超时时间
clientId: 'wx_' + clinet_id,
username: '账号',
password: '密码',
}
client = mqtt.connect('wx://你的ip:8083/mqtt', options)
console.log(client);
client.on('reconnect', (error) => {
console.log('正在重连:', error)
})
client.on('error', (error) => {
console.log('连接失败:', error)
})
let that = this;
client.on('connect', (e) => {
console.log('成功连接服务器')
//订阅一个主题
client.subscribe('pop', {
qos: 0
}, function(err) {
if (!err) {
console.log("订阅成功")
that.setData({
state:'已连接pop服务器'
})
}
})
})
client.on('message', function (topic, message) {
console.log('received msg:' + message.toString());
// wx.showToast({
// title: message.toString(),
// })
})
},
onLoad:function(){
let that=this;
that.connectMqtt();
},
})
无法在真机上使用的请换一下MQTT的js