微信小程序连接蓝牙工具类支持IOS和安卓

// 初始化蓝牙(判断用户有没有开蓝牙) --> 搜索蓝牙 --> 连接蓝牙 --> 根据连接的deviceId获取服务serviceUUID -->// 根据服务serviceUUID获取特征值 --> 根据特征值获取 读写权限 --> 根据读写 数据交互var test = 'FE08010000000000000108';var ble={//适配器开启状态openBluetoothAdapter:false,//蓝牙是否可用available:false,//服务发现是否开启discovering:false,//发现的设备列表deviceList:[],//当前连接设备idconnectingDeviceId:'',//服务uuidservices_UUID:'',//特征值uuidcharacteristic_UUID:'',}//蓝牙方法// 初始化蓝牙ble.openEvent = () => {wx.getLocation({type: 'gcj02', //返回可以用于wx.openLocation的经纬度success: function (res) {// let latitude = res.latitude //维度// let longitude = res.longitude //经度console.log(res);}});openBluetooth();}// 搜索蓝牙ble.searchEvent = () => {if (ble.discovering){toast('正在搜索');return;}ble.deviceList= []// 停止搜寻附近的蓝牙外围设备stopDiscovery();// 获取本机蓝牙适配器状态if(getBluetoothState()){return;}// 监听蓝牙适配器状态变化事件onBluetoothStateChange();// 开始搜寻附近的蓝牙外\围设备startDiscovery();// 监听寻找到新设备onFoundBluetooth();}// 连接设备ble.connectEvent = function(deviceId, successCallback,errorCallback){if(this.data.connected){return;}// 停止搜寻附近的蓝牙外围设备stopDiscovery();// 断开与低功耗蓝牙设备的连接 然后再连接新的设备closeConnection(deviceId);// 连接低功耗蓝牙设备BLEConnection(deviceId);}//蓝牙发送数据ble.sendMsg = function(msg, successCallback,errorCallback){this.writeToBluetoothValue(ble.connectingDeviceId,ble.services_UUID,ble.characteristic_UUID,msg,successCallback,errorCallback);}//=========================================//依赖方法// 初始化蓝牙模块function openBluetooth(){wx.openBluetoothAdapter({success(e){if (e.errMsg == 'openBluetoothAdapter:ok'){ble.openBluetoothAdapter = true;getBluetoothState();}},fail(){wx.showModal({title: '温馨提示',content: '请检查手机蓝牙是否开启',showCancel:false});ble.openBluetoothAdapter = false;},})}// 获取本机蓝牙适配器状态function getBluetoothState(){wx.getBluetoothAdapterState({success(e){ble.available=e.availableble.discovering=e.discoveringreturn true;},fail(){ble.available=falseble.discovering=falsereturn false;}});}// 停止搜寻附近的蓝牙外围设备function stopDiscovery(){wx.stopBluetoothDevicesDiscovery({success(res){console.log('停止搜寻附近的蓝牙外围设备');console.log(res);ble.discovering = false},fail(){toast('停止搜索失败');},});}// 监听蓝牙适配器状态变化事件function onBluetoothStateChange(){wx.onBluetoothAdapterStateChange(function(res){ble.available = res.availableble.discovering = res.discovering});}// 开始搜寻附近的蓝牙外围设备function startDiscovery(){console.log('开始搜索设备');wx.startBluetoothDevicesDiscovery({success (res) {ble.discovering = res.isDiscovering// that.getDevices();},fail(){ble.discovering = falsetoast('搜索失败');}})}// 监听寻找到新设备的事件function onFoundBluetooth(){wx.onBluetoothDeviceFound(function (res) {// that.getDevices();// 兼容安卓及iOS设备if(res.deviceId){that.devicesData(res);} else if(res.devices){that.devicesData(res.devices[0]);} else if(res[0]){that.devicesData(res[0]);}});}// 获取在蓝牙模块生效期间所有已发现的蓝牙设备，包括已经和本机处于连接状态的设备function getDevices(){wx.getBluetoothDevices({success: function (res) {console.log('获取在蓝牙模块生效期间所有已发现的蓝牙设备，包括已经和本机处于连接状态的设备');console.log(res);ble.deviceList = res.devices;}})}// 断开与低功耗蓝牙设备的连接function closeConnection(){let connectingDeviceId = ble.connectingDeviceId;if(!connectingDeviceId){return;}wx.closeBLEConnection({deviceId: connectingDeviceId,success(res){console.log('断开与低功耗蓝牙设备的连接');console.log(res);},fail(){toast('断开连接失败');}});}// 连接低功耗蓝牙设备function BLEConnection(deviceId){loading('连接中');console.log('连接中...');console.log(deviceId);wx.createBLEConnection({deviceId: deviceId,timeout: 60000,success(res){console.log('连接成功');console.log(res);// connectingDeviceId = deviceId;ble.connected = true;ble.connectingDeviceId = deviceIdgetServices(deviceId);hide_Loading();toast('连接成功');},fail(res){console.log('连接失败');console.log(res);ble.connected = false;hide_Loading();},});}// 获取蓝牙设备所有服务(service) 为了获取service的UUIDfunction getServices(deviceId){// console.log(deviceId);wx.getBLEDeviceServices({deviceId:deviceId,success(res){// console.log('获取蓝牙设备service');console.log(res);ble.services = res.serviceslet uuid = res.services;let len = uuid.length;for(let i = 0; i < len; i++){// if (res.services[i].isPrimary) {getCharacteristics(deviceId,res.services[i].uuid);}},fail(res){toast('获取服务失败');console.log(res);},});}// 获取蓝牙设备某个服务中所有特征值(characteristic) 为了该特征值UUID支持的操作类型function getCharacteristics(deviceId,servicesId){wx.getBLEDeviceCharacteristics({deviceId:deviceId,serviceId:servicesId,success(res){console.log('获取蓝牙设备characteristic');console.log(res);if(res.errCode === 0){let characteristics = res.characteristics;let len = characteristics.length;for(let k = 0; k < len; k++){let indicate = characteristics[k].properties.indicate;let notify = characteristics[k].properties.notify;let read = characteristics[k].properties.read;let write = characteristics[k].properties.write;console.log(indicate,notify,read,write);if(indicate && notify && read && write){// let connectingDeviceId = res.deviceId;let connectingDeviceId = deviceId;console.log('connectingDeviceId');console.log(connectingDeviceId);// let services_UUID = res.serviceId;let services_UUID = servicesId;console.log('services_UUID');console.log(services_UUID);let characteristic_UUID = characteristics[k].uuid;console.log('characteristic_UUID');console.log(characteristic_UUID);ble.connectingDeviceId = connectingDeviceId;ble.services_UUID = services_UUIDble.characteristic_UUID = characteristic_UUIDnotifyValueChange(connectingDeviceId,services_UUID,characteristic_UUID);}}}},fail(){toast('获取特征值失败');}});}// 启用低功耗蓝牙设备特征值变化时的 notify 功能，订阅特征值function notifyValueChange(deviceId,services_UUID,characteristic_UUID){wx.notifyBLECharacteristicValueChange({deviceId:deviceId,serviceId:services_UUID,characteristicId:characteristic_UUID,state:true,success(res){console.log('启用低功耗蓝牙设备特征值变化时的 notify 功能，订阅特征值: 成功---');console.log(res);onValueChange();// setTimeout(function () {//let connectingDeviceId = that.data.connectingDeviceId;//let services_UUID = that.data.services_UUID;//let characteristic_UUID = that.data.characteristic_UUID;//writeToBluetoothValue(connectingDeviceId,services_UUID,characteristic_UUID,test);// },1000);},fail(res){console.log('启用低功耗蓝牙设备特征值变化时的 notify 功能，订阅特征值: 失败---');console.log(res);},});}// 监听低功耗蓝牙设备的特征值变化// 必须先启用 notifyBLECharacteristicValueChange 接口才能接收到设备推送的 notification。function onValueChange(){wx.onBLECharacteristicValueChange(function(res){console.log('监听低功耗蓝牙设备的特征值变化');console.log(res);console.log(ab2hex(res.value));// 获取设备返回的数据let hex = ab2hex(res.value);// 获取总次数let num = hexSlice(hex);console.log(num)ble.shakeNum = num});}// 蓝牙写数据function writeToBluetoothValue(deviceId,services_UUID,characteristic_UUID,buffer,successCallback,errorCallback){let value = hex2ab(buffer);wx.writeBLECharacteristicValue({deviceId:deviceId,serviceId:services_UUID,characteristicId:characteristic_UUID,value:value,success(res){console.log('向低功耗蓝牙设备特征值中写入二进制数据: 成功---');console.log(res);successCallback(res)},fail(res){console.log('向低功耗蓝牙设备特征值中写入二进制数据: 失败---');console.log(res);errorCallback(res)}})}// 读取低功耗蓝牙设备的特征值的二进制数据值// 接口读取到的信息需要在 onBLECharacteristicValueChange 方法注册的回调中获取function readValue(){let connectingDeviceId = this.data.connectingDeviceId;let services_UUID = this.data.services_UUID;let characteristic_UUID = this.data.characteristic_UUID;wx.readBLECharacteristicValue({deviceId:connectingDeviceId,serviceId:services_UUID,characteristicId:characteristic_UUID,success(res){console.log('读取低功耗蓝牙设备的特征值的二进制数据值: 成功---');console.log(res);},fail(res){console.log('读取低功耗蓝牙设备的特征值的二进制数据值: 失败---');console.log(res);}});}//=========================================//工具函数// ArrayBuffer转16进度字符串示例function ab2hex(buffer) {let hexArr = Array.prototype.map.call(new Uint8Array(buffer),function (bit) {return ('00' + bit.toString(16)).slice(-2);});return hexArr.join('');}/*** 16进制字符串转ArrayBuffer*/function hex2ab(str) {if (!str) {return new ArrayBuffer(0);}let typedArray = new Uint8Array(str.match(/[\da-f]{2}/gi).map(function (h) {return parseInt(h, 16)}));let buffer1 = typedArray.buffer;console.log(buffer1);return buffer1;}// 16进制字符串取需要的字节(fe 08 01 00 01 01 01 7a0b 008f)function hexSlice(hex) {// 取k8位let k8 = hex.slice(14,16);//取k9位let k9 = hex.slice(16,18);return parseInt(k9+k8,16);}function toast(title) {wx.showToast({title: title,icon:'none',duration:1500,success(){setTimeout(()=>{wx.hideToast();},2000);}});}function loading(title) {wx.showLoading({title:title,mask:true,});}function hide_Loading() {wx.hideLoading();}//拼接新的devicefunction devicesData(new_devices){let deviceList = ble.deviceList;let len = deviceList.length;let isExist = false;console.log(new_devices);if(!new_devices.name){new_devices.name = '空';return;}let advertisData = ab2hex(new_devices.advertisData);if(!advertisData){advertisData = '空';}new_devices.advertisData = advertisData;for(let i = 0; i < len; i++){if(new_devices.deviceId == deviceList[i].deviceId){isExist = true;deviceList.splice(i,1,new_devices);}}if(!isExist){deviceList.push(new_devices);}ble.deviceList = deviceList}