refactor: migrate to Tencent Cloud backend

miniprogram/pages/index/index.js

@@ -1,5 +1,4 @@
 var ble = require('../../services/ble')
-var mqtt = require('../../services/mqtt')
 var http = require('../../utils/request')
 var app = getApp()
 
@@ -43,6 +42,7 @@ Page({
       var devices = data.devices || []
       self.setData({ hasDevice: devices.length > 0 })
       if (devices.length > 0) {
+        app.globalData.currentDevice = devices[0]
         self.setData({
           deviceName: devices[0].name || devices[0].device_id || '我的光面膜',
           deviceInfo: devices[0]