微信小程序能不能打开硬件开关？硬件有手机卡能通信，类似单片机

//index.js //获取应用实例 const app = getApp() Page({      sxbut:function () {        var that = this;     //读取数据库     wx.request({       url: 'http://xxxxxx/xxxx.php',       method: 'GET',       data: {         nname: 'jack'       },       header: {         'content-Type': 'application/json'       },       success(res) {         console.log(res),         console.log(res.data),            that.setData({             List: res.data,           });       }     });  } }) -------------------------------------------------------------------------------------- print:res.data显示： Array (     [0] => Array         (             [0] => jack             [name] => jack             [1] => 30             [age] => 30             [2] => 男             [xinbie] => 男         ) ) ------------------------------------------------ wxml怎样写？让name,age,xinbie显示出来

怎样把excel数据导入到云数据库？

微信小程序如何把图片buffer数据转成文件？

[图片]

微信公众号只能绑定3个小程序？有没有什么方法可以绑定更多？

不管几位坐标数据，导航都指向一个地方 // index.js   const app = getApp() const DB= wx.cloud.database() Page({   data: {     latitude: 35.2457853400,    //初始化     longitude: 113.2484514100,   },   onLoad: function (options) {  var dname = options.dname;     console.log('测试',dname)   var labelname=dname     DB.collection('map').where({     label:{"content":labelname}       }) .get() .then(res=>{ console.log(res); console.log("test 测试1",res.data) console.log("test 测试1",res.data[0].latitude) console.log("test 测试1",res.data[0].longitude) var latitude=res.data[0].latitude var latitude=parseInt(latitude) var longitude=res.data[0].longitude var longitude=parseInt(longitude) var name=res.data[0].label.content wx.openLocation({     latitude:(latitude),     longitude: (longitude),     name: (name),     scale: 15    }) }) .catch(err=>{                            console.log(err);     }) } }) ----------------------------------------------------------------------------------------------------------------------------------------- 已经解决；var latitude=parseInt(latitude)； var longitude=parseInt(longitude)； parseInt()改为Number()，就 ok了。

// index.js   const app = getApp() const DB= wx.cloud.database() Page({   data: {     latitude: 35.2457853400,    //初始化     longitude: 113.2484514100,   },   onLoad: function (options) {  var dname = options.dname;     console.log('测试',dname)   var labelname=dname     DB.collection('map').where({     label:{"content":labelname}       }) .get() .then(res=>{ console.log(res); console.log("test 测试1",res.data) console.log("test 测试1",res.data[0].latitude) console.log("test 测试1",res.data[0].longitude) var latitude=res.data[0].latitude var latitude=parseInt(latitude) var longitude=res.data[0].longitude var longitude=parseInt(longitude) var name=res.data[0].label.content1 wx.openLocation({     latitude:(latitude),     longitude: (longitude),     name: (name),     scale: 15    }) }) .catch(err=>{                            console.log(err);     }) } })

 const db = wx.cloud.database()  db.collection('tt').orderby('time','asc').where({           //此地需要写orderby??     time: 20//可为变量   })     .get()     .then(res => {       console.log(res);      }） 提示：VM212:1 thirdScriptError db.collection(...).orderby is not a function;at "pages/page/index" page lifeCycleMethod onLoad function TypeError: db.collection(...).orderby is not a function     at Ue.onLoad (http://127.0.0.1:17063/appservice/pages/yd%20page/index.js:231:25)     at Ue.<anonymous> (http://127.0.0.1:17063/appservice/__dev__/WAService.js:2:1928503)     at Ue.p.__callPageLifeTime__ (http://127.0.0.1:17063/appservice/__dev__/WAService.js:2:1928248)     at jt (http://127.0.0.1:17063/appservice/__dev__/WAService.js:2:1944068)     at Mt (http://127.0.0.1:17063/appservice/__dev__/WAService.js:2:1946017)     at Function.<anonymous> (http://127.0.0.1:17063/appservice/__dev__/WAService.js:2:1956428)     at i.<anonymous> (http://127.0.0.1:17063/appservice/__dev__/WAService.js:2:1919155)     at i.emit (http://127.0.0.1:17063/appservice/__dev__/WAService.js:2:621502)     at Object.emit (http://127.0.0.1:17063/appservice/__dev__/WAService.js:2:588082)     at i.<anonymous> (http://127.0.0.1:17063/appservice/__dev__/WAService.js:2:679270) 

1、pages/index/index.js const app = getApp() var access_token  var accessToken }) Page({     onLoad: function () {     var that = this;    var dname=123456     wx.request({     url: 'https://api.weixin.qq.com/cgi-bin/token',     header: { 'content-type': 'application/json' },     data: {         grant_type: 'client_credential',         appid:'xxxxxxxxxxxxxx',         secret: 'xxxxxxxxxxxxxxxxx'     },     success(res) {         accessToken = res.data.access_token         wx.request({            url: 'https://api.weixin.qq.com/wxa/getwxacode?access_token='+accessToken,                       method: 'POST',             responseType: 'arraybuffer',             data: {                 "path": 'pages/index2/index?dname='+dname,                 "width": 430,                },             success(res) {               let base64 = wx.arrayBufferToBase64(res.data)               //console.log(base64)               let codeImg= 'data:image/PNG;base64,' + base64               console.log(codeImg)               that.setData({codeImg: codeImg})                              },         })       }     })   }, }) 2、pages/index/index.wxml <view class="m"> <image style="width: 200px; height: 200px; background-color: #eeeeee;" src="{{codeImg}}"></image> </view> 3、pages/index2/index.js const DB= wx.cloud.database() const db= wx.cloud.database() Page({ onLoad: function (options) {     var dname=options.dname this.setData({   dname:dname }) DB.collection("sok").add({   // 添加数据到      data: {      dname:dname                    }     })   }, 4、pages/index2/index.wxml <text>{{pdname2}}</text> ------------------------------------------------------------------------ 在电脑上运行可以，在手机上运行不显示二维码？