微信小程序--Ble蓝牙

有一段时间没有。没有写关于小程序的文章了。3月28日，微信的api又一次新的更新。期待已久的蓝牙api更新。就开始撸一番。

1.简述

蓝牙适配器接口是基础库版本 1.1.0 开始支持。

ios 微信客户端 6.5.6 版本开始支持，android 客户端暂不支持

蓝牙总共增加了18个api接口。

2.api分类

搜索类

连接类

通信类

3.api的具体使用

详细见官网：

4. 案例实现

4.1 搜索蓝牙设备

/**
 * 搜索设备界面
 */
page({
 data: {
 logs: [],
 list:[],
 },
 onload: function () {
 console.log('onload')
var that = this;
// const sdkversion = wx.getsysteminfosync().sdkversion || '1.0.0'
// const [major, minor, patch] = sdkversion.split('.').map(number)
// console.log(sdkversion);
// console.log(major);
// console.log(minor);
// console.log(patch);

// const caniuse = apiname => {
// if (apiname === 'showmodal.cancel') {
//  return major >= 1 && minor >= 1
// }
// return true
// }

// wx.showmodal({
// success: function(res) {
//  if (caniuse('showmodal.cancel')) {
//  console.log(res.cancel)
//  }
// }
// })
  //获取适配器
  wx.openbluetoothadapter({
  success: function(res){
  // success
  console.log("-----success----------");
   console.log(res);
   //开始搜索
  wx.startbluetoothdevicesdiscovery({
 services: [],
 success: function(res){
 // success
  console.log("-----startbluetoothdevicesdiscovery--success----------");
  console.log(res);
 },
 fail: function(res) {
 // fail
  console.log(res);
 },
 complete: function(res) {
 // complete
  console.log(res);
 }
})

  },
  fail: function(res) {
   console.log("-----fail----------");
  // fail
   console.log(res);
  },
  complete: function(res) {
  // complete
   console.log("-----complete----------");
   console.log(res);
  }
 })

  wx.getbluetoothdevices({
  success: function(res){
   // success
   //{devices: array[11], errmsg: "getbluetoothdevices:ok"}
   console.log("getbluetoothdevices");
   console.log(res);
   that.setdata({
   list:res.devices
   });
   console.log(that.data.list);
  },
  fail: function(res) {
   // fail
  },
  complete: function(res) {
   // complete
  }
  })

 },
 onshow:function(){

 },
 //点击事件处理
 bindviewtap: function(e) {
  console.log(e.currenttarget.dataset.title);
  console.log(e.currenttarget.dataset.name);
  console.log(e.currenttarget.dataset.advertisdata);

 var title = e.currenttarget.dataset.title;
 var name = e.currenttarget.dataset.name;
  wx.redirectto({
  url: '../conn/conn?deviceid='+title+'&name='+name,
  success: function(res){
   // success
  },
  fail: function(res) {
   // fail
  },
  complete: function(res) {
   // complete
  }
  })
 },
})

4.2连接 获取数据

/**
 * 连接设备。获取数据
 */
page({
 data: {
  motto: 'hello world',
  userinfo: {},
  deviceid: '',
  name: '',
  serviceid: '',
  services: [],
  cd20: '',
  cd01: '',
  cd02: '',
  cd03: '',
  cd04: '',
  characteristics20: null,
  characteristics01: null,
  characteristics02: null,
  characteristics03: null,
  characteristics04: null,
  result,

 },
 onload: function (opt) {
  var that = this;
  console.log("onload");
  console.log('deviceid=' + opt.deviceid);
  console.log('name=' + opt.name);
  that.setdata({ deviceid: opt.deviceid });
  /**
   * 监听设备的连接状态
   */
  wx.onbleconnectionstatechanged(function (res) {
   console.log(`device ${res.deviceid} state has changed, connected: ${res.connected}`)
  })
  /**
   * 连接设备
   */
  wx.createbleconnection({
   deviceid: that.data.deviceid,
   success: function (res) {
    // success
    console.log(res);
    /**
     * 连接成功，后开始获取设备的服务列表
     */
    wx.getbledeviceservices({
     // 这里的 deviceid 需要在上面的 getbluetoothdevices中获取
     deviceid: that.data.deviceid,
     success: function (res) {
      console.log('device services:', res.services)
      that.setdata({ services: res.services });
      console.log('device services:', that.data.services[1].uuid);
      that.setdata({ serviceid: that.data.services[1].uuid });
      console.log('--------------------------------------');
      console.log('device设备的id:', that.data.deviceid);
      console.log('device设备的服务id:', that.data.serviceid);
      /**
       * 延迟3秒，根据服务获取特征 
       */
      settimeout(function () {
       wx.getbledevicecharacteristics({
        // 这里的 deviceid 需要在上面的 getbluetoothdevices
        deviceid: that.data.deviceid,
        // 这里的 serviceid 需要在上面的 getbledeviceservices 接口中获取
        serviceid: that.data.serviceid,
        success: function (res) {
         console.log('000000000000' + that.data.serviceid);
         console.log('device getbledevicecharacteristics:', res.characteristics)
         for (var i = 0; i < 5; i++) {
          if (res.characteristics[i].uuid.indexof("cd20") != -1) {
           that.setdata({
            cd20: res.characteristics[i].uuid,
            characteristics20: res.characteristics[i]
           });
          }
          if (res.characteristics[i].uuid.indexof("cd01") != -1) {
           that.setdata({
            cd01: res.characteristics[i].uuid,
            characteristics01: res.characteristics[i]
           });
          }
          if (res.characteristics[i].uuid.indexof("cd02") != -1) {
           that.setdata({
            cd02: res.characteristics[i].uuid,
            characteristics02: res.characteristics[i]
           });
          } if (res.characteristics[i].uuid.indexof("cd03") != -1) {
           that.setdata({
            cd03: res.characteristics[i].uuid,
            characteristics03: res.characteristics[i]
           });
          }
          if (res.characteristics[i].uuid.indexof("cd04") != -1) {
           that.setdata({
            cd04: res.characteristics[i].uuid,
            characteristics04: res.characteristics[i]
           });
          }
         }
         console.log('cd01= ' + that.data.cd01 + 'cd02= ' + that.data.cd02 + 'cd03= ' + that.data.cd03 + 'cd04= ' + that.data.cd04 + 'cd20= ' + that.data.cd20);
         /**
          * 回调获取 设备发过来的数据
          */
         wx.onblecharacteristicvaluechange(function (characteristic) {
          console.log('characteristic value comed:', characteristic.value)
          //{value: arraybuffer, deviceid: "d8:00:d2:4f:24:17", serviceid: "ba11f08c-5f14-0b0d-1080-007cbe238851-0x600000460240", characteristicid: "0000cd04-0000-1000-8000-00805f9b34fb-0x60800069fb80"}
          /**
           * 监听cd04cd04中的结果
           */
          if (characteristic.characteristicid.indexof("cd01") != -1) {
           const result = characteristic.value;
           const hex = that.buf2hex(result);
           console.log(hex);
          }
          if (characteristic.characteristicid.indexof("cd04") != -1) {
           const result = characteristic.value;
           const hex = that.buf2hex(result);
           console.log(hex);
           that.setdata({ result: hex });
          }

         })
         /**
          * 顺序开发设备特征notifiy
          */
         wx.notifyblecharacteristicvaluechanged({
          deviceid: that.data.deviceid,
          serviceid: that.data.serviceid,
          characteristicid: that.data.cd01,
          state: true,
          success: function (res) {
           // success
           console.log('notifyblecharacteristicvaluechanged success', res);
          },
          fail: function (res) {
           // fail
          },
          complete: function (res) {
           // complete
          }
         })
         wx.notifyblecharacteristicvaluechanged({
          deviceid: that.data.deviceid,
          serviceid: that.data.serviceid,
          characteristicid: that.data.cd02,
          state: true,
          success: function (res) {
           // success
           console.log('notifyblecharacteristicvaluechanged success', res);
          },
          fail: function (res) {
           // fail
          },
          complete: function (res) {
           // complete
          }
         })
         wx.notifyblecharacteristicvaluechanged({
          deviceid: that.data.deviceid,
          serviceid: that.data.serviceid,
          characteristicid: that.data.cd03,
          state: true,
          success: function (res) {
           // success
           console.log('notifyblecharacteristicvaluechanged success', res);
          },
          fail: function (res) {
           // fail
          },
          complete: function (res) {
           // complete
          }
         })

         wx.notifyblecharacteristicvaluechanged({
          // 启用 notify 功能
          // 这里的 deviceid 需要在上面的 getbluetoothdevices 或 onbluetoothdevicefound 接口中获取
          deviceid: that.data.deviceid,
          serviceid: that.data.serviceid,
          characteristicid: that.data.cd04,
          state: true,
          success: function (res) {
           console.log('notifyblecharacteristicvaluechanged success', res)
          }
         })

        }, fail: function (res) {
         console.log(res);
        }
       })
      }
       , 1500);
     }
    })
   },
   fail: function (res) {
    // fail
   },
   complete: function (res) {
    // complete
   }
  })
 },

 /**
  * 发送 数据到设备中
  */
 bindviewtap: function () {
  var that = this;
  var hex = 'aa5504b10000b5'
  var typedarray = new uint8array(hex.match(/[\da-f]{2}/gi).map(function (h) {
   return parseint(h, 16)
  }))
  console.log(typedarray)
  console.log([0xaa, 0x55, 0x04, 0xb1, 0x00, 0x00, 0xb5])
  var buffer1 = typedarray.buffer
  console.log(buffer1)
  wx.writeblecharacteristicvalue({
   deviceid: that.data.deviceid,
   serviceid: that.data.serviceid,
   characteristicid: that.data.cd20,
   value: buffer1,
   success: function (res) {
    // success
    console.log("success 指令发送成功");
    console.log(res);
   },
   fail: function (res) {
    // fail
    console.log(res);
   },
   complete: function (res) {
    // complete
   }
  })

 },
 /**
  * arraybuffer 转换为 hex
  */
 buf2hex: function (buffer) { // buffer is an arraybuffer
  return array.prototype.map.call(new uint8array(buffer), x => ('00' + x.tostring(16)).slice(-2)).join('');
 }
})

5.效果展示

发送校验指令。获取结果

以上就是本文的全部内容，希望本文的内容对大家的学习或者工作能带来一定的帮助，同时也希望多多支持！