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<view class="m_t_36"><view class="w_50_ h_100 lh_100 m_l_a m_r_a bc_409eff radius_10 color_fff ta_c" @click="openBluetoothAdapter()">一键开门</view>
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JavaScript

export default {data() {return {timeout: undefined,// 后端保存蓝牙信息bluetooths: [{deviceId: "0A:45:32:0C:78:C6",name: "YX_0A45320C78C6",serviceId: '0000FFB0-0000-1000-8000-00805F9B34FB',notifyId: '0000FFB2-0000-1000-8000-00805F9B34FB',writeId: '0000FFB1-0000-1000-8000-00805F9B34FB',instruction: 'EE03E30100'},{deviceId: "5C:C3:36:8D:B9:FC",name: "RTK_BT_4.1v",serviceId: '0000FFB0-0000-1000-8000-00805F9B34FB',notifyId: '0000FFB2-0000-1000-8000-00805F9B34FB',writeId: '0000FFB1-0000-1000-8000-00805F9B34FB',instruction: 'EE03E30100'}],bluetooth: {}}},methods: {/*** 根据不同方法名调用方法，统一定时器的触发判断，* 当定时器触发时，无法确定当前调用的方法是哪个* @param {String} fnName */methodExecution(fnName = '') {if (this.timeout) {this[fnName]();} else {console.log('执行方法');}},// 数据初始化initInfo() {// 清除定时器无效的解决方案this.timeout = undefined;this.bluetooth = {};},// 初始化蓝牙模块openBluetoothAdapter() {let that = this;// 向低功耗蓝牙设备特征值中写入二进制数据。// 注意：必须设备的特征值支持 write 才可以成功调用。if (Object.keys(that.bluetooth).length) return that.writeBLECharacteristicValue();// 数据初始化that.initInfo();// 初始化蓝牙模块uni.openBluetoothAdapter({// 主服务的UUID是YX。传入这个参数，只搜索主服务UUID为YX的设备// services: ['YX'],success() {// 开始搜索附近的蓝牙设备that.startBluetoothDevicesDiscovery();},fail() {uni.showToast({icon: 'none',title: '查看手机蓝牙是否打开'});}});},// 开始搜索附近的蓝牙设备startBluetoothDevicesDiscovery() {let that = this;uni.showLoading({title: '加载中',mask: true});that.timeout = setTimeout(() => {// 数据初始化that.initInfo();uni.hideLoading();uni.showToast({icon: 'none',title: '开门失败'});}, 1000 * 20);// 开始搜索附近的蓝牙设备uni.startBluetoothDevicesDiscovery({success() {// 监听返回的蓝牙设备uni.onBluetoothDeviceFound(({devices}) => {if (devices.length) {let bluetooths = that.bluetooths;// 多对多查找for (let i = 0; i < devices.length; i++) {let itemI = devices[i];if (itemI.name) {for (let j = 0; j < bluetooths.length; j++) {let itemJ = bluetooths[i];if (itemI.deviceId === itemJ.deviceId && itemI.name === itemJ.name) {that.bluetooth = itemJ;setTimeout(() => { that.createBLEConnection() }, 0);return undefined;}}}}}});},fail() {that.methodExecution('startBluetoothDevicesDiscovery');}});},// 连接低功耗蓝牙设备createBLEConnection() {let that = this;// 连接低功耗蓝牙设备uni.createBLEConnection({deviceId: that.bluetooth.deviceId,success() {// 停止搜寻附近的蓝牙外围设备uni.stopBluetoothDevicesDiscovery({success() {// 获取蓝牙服务// that.getBLEDeviceServices();// 启用低功耗蓝牙设备特征值变化时的notify功能，订阅特征值that.notifyBLECharacteristicValueChange();},fail() { }});},fail() {// 连接低功耗蓝牙设备that.methodExecution('createBLEConnection');}});},// 启用低功耗蓝牙设备特征值变化时的notify功能，订阅特征值notifyBLECharacteristicValueChange() {let that = this,{ deviceId, serviceId, notifyId } = that.bluetooth;// 启用低功耗蓝牙设备特征值变化时的notify功能，订阅特征值uni.notifyBLECharacteristicValueChange({state: true,deviceId,serviceId,characteristicId: notifyId,success() {// 监听低功耗蓝牙设备的特征值变化事件。// 必须先启用 notifyBLECharacteristicValueChange 接口才能接收到设备推送的 notification。that.onBLECharacteristicValueChange();},fail() {// 启用低功耗蓝牙设备特征值变化时的notify功能，订阅特征值that.methodExecution('notifyBLECharacteristicValueChange');}});},// 监听低功耗蓝牙设备的特征值变化事件。// 必须先启用 notifyBLECharacteristicValueChange 接口才能接收到设备推送的 notification。onBLECharacteristicValueChange() {let that = this;// 监听低功耗蓝牙设备的特征值变化事件。// 必须先启用 notifyBLECharacteristicValueChange 接口才能接收到设备推送的 notification。uni.onBLECharacteristicValueChange(() => {that.writeBLECharacteristicValue();});},// 向低功耗蓝牙设备特征值中写入二进制数据。// 注意：必须设备的特征值支持 write 才可以成功调用。writeBLECharacteristicValue() {let that = this,{ deviceId, serviceId, writeId, instruction } = that.bluetooth,typedArray = new Uint8Array(instruction.match(/[\da-f]{2}/gi).map((h) => parseInt(h, 16))),buffer = typedArray.buffer;// 向低功耗蓝牙设备特征值中写入二进制数据。// 注意：必须设备的特征值支持 write 才可以成功调用。uni.writeBLECharacteristicValue({deviceId,serviceId,characteristicId: writeId,value: buffer,success() {uni.showToast({title: '开门成功',icon: 'none'});},fail() {uni.showToast({title: '开门失败',icon: 'none'});},complete() {clearTimeout(that.timeout);that.timeout = undefined;uni.hideLoading();}});},// 关闭(断开)蓝牙模块closeBluetoothAdapter() {let that = this;// 关闭(断开)蓝牙模块uni.closeBluetoothAdapter({success: () => {uni.showToast({title: '蓝牙已关闭',icon: 'none'});clearTimeout(that.timeout);that.timeout = undefined;uni.hideLoading();that.initInfo();},fail() {that.closeBluetoothAdapter();}});},// 监听页面隐藏onHide() {// 关闭(断开)蓝牙模块// this.closeBluetoothAdapter();},// 监听页面卸载onUnload() {// 关闭(断开)蓝牙模块this.closeBluetoothAdapter();}}
}

坑

1、notifyBLECharacteristicValueChange方法用的是读取的特征值。
2、writeBLECharacteristicValue发送指令，返回成功，蓝牙设备无反应，大概率是指令问题。
3、关闭蓝牙有两个API，目前测试只有closeBluetoothAdapter彻底断开蓝牙。
4、setTimeout无法彻底清除定时器，需要手动设置属性值为undefined。