小程序连接蓝牙设备

<button bindtap="startSao" type="primary">开始扫描</button>
<button bindtap="stopDiscovery" type="primary">停止搜索设备</button>

<button bindtap="connectToDevice" data-device-id="{
  {device.deviceId}}">连接</button>
<view wx:for="{
  {list}}" wx:for-item='deviceID' wx:for-index='index'>
   {
  {deviceID}}
   <text wx:if="{
  {index < list.length - 1}}">, </text>
</view>

// index.js
Component({
  data: {
    list:[],
  },
  methods: {
    // 事件处理函数
    startSao:function(){
      var that=this;
      wx.openBluetoothAdapter({
        success (res) {
          wx.