微信小程序如何实现蓝牙的实例分享

微信小程序 蓝牙的实现实例代码

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：

https://mp.weixin.qq.com/debug/wxadoc/dev/api/bluetooth.html#wxgetconnectedbluethoothdevicesobject

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

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