微信小程序藍(lán)牙連接2.0說(shuō)明:
1、本版本區(qū)分了ANDROID和IOS系統(tǒng)下藍(lán)牙連接的不同方式。
2、兼容了更多情況下的鏈接包括:
(1)未開(kāi)啟設(shè)備藍(lán)牙,當(dāng)監(jiān)聽(tīng)到開(kāi)啟了藍(lán)牙后自動(dòng)開(kāi)始連接。
(2)初始化藍(lán)牙失敗后每3000ms自動(dòng)重新初始化藍(lán)牙適配器。
(3)安卓端開(kāi)啟藍(lán)牙適配器掃描失敗,每3000ms自動(dòng)重新開(kāi)啟。
(4)IOS端獲取已連接藍(lán)牙設(shè)備為空,每3000ms自動(dòng)重新獲取。
(5)安卓端藍(lán)牙開(kāi)始鏈接后中斷掃描,連接失敗了,重新開(kāi)始掃描。
(6)IOS端開(kāi)始連接設(shè)備后,停止獲取已連接設(shè)備,連接失敗自動(dòng)重新開(kāi)啟獲取。
(7)連接成功后,關(guān)閉系統(tǒng)藍(lán)牙,藍(lán)牙適配器重置。
(8)連接成功后,關(guān)閉系統(tǒng)藍(lán)牙,再次打開(kāi)藍(lán)牙,自動(dòng)重新開(kāi)始連接。
(9)連接成功后,關(guān)閉目標(biāo)藍(lán)牙設(shè)備,自動(dòng)重新開(kāi)始掃描(獲?。?。
(10)連接成功后,最小化小程序(連接未中斷),打開(kāi)小程序顯示已連接。
(11)連接成功后,殺掉小程序進(jìn)程,連接關(guān)閉,自動(dòng)重新開(kāi)始掃描(獲取)。
3、想起來(lái)了再來(lái)更新....。
4、流程圖,明天或后天或...誰(shuí)有空幫我畫(huà)一下也行。
我的連接是在App.js中做的。
在App.js中的onLaunch觸發(fā)是調(diào)用 init()方法。
init代碼:
init: function (n) {this.list = [];this.serviceId = "6E400001-B5A3-F393-E0A9-E50E24DCCA9E";this.serviceId_2 = "00001803-0000-1000-8000-00805F9B34FB";this.serviceId_3 = "00001814-0000-1000-8000-00805F9B34FB";this.serviceId_4 = "00001802-0000-1000-8000-00805F9B34FB";this.serviceId_5 = "00001804-0000-1000-8000-00805F9B34FB";this.serviceId_6 = "00001535-1212-EFDE-1523-785FEABCD123";this.characterId_write = "6E400042-B5A3-F393-E0A9-E50E24DCCA9E";this.characterId_read = "6E400012-B5A3-F393-E0A9-E50E24DCCA9E";this.connectDeviceIndex = 0;this.isGettingConnected = false;this.isDiscovering = false;this.isConnecting = false;this.connectedDevice = {};console.log('init state', this.connectedDevice.state);if (!this.connectedDevice.state || n == 200) {this.connectedDevice.state = false;this.connectedDevice.deviceId = '';this.adapterHasInit = false}this.startConnect();}1、 serviceId_2~6 是我已知的想要連接的藍(lán)牙設(shè)備的serviceId可以只寫(xiě)一個(gè)。 2、characterId_write 是我已知的想要連接的藍(lán)牙設(shè)備寫(xiě)入數(shù)據(jù)的特征值。 3、characterId_read是我已知的想要連接的藍(lán)牙設(shè)備讀取數(shù)據(jù)的特征值。 (以上3個(gè)都是為了做比對(duì),真實(shí)的操作按照獲取到的sericeid, characterid為準(zhǔn))。 4、connectedDevice 是已連接了的設(shè)備信息對(duì)象。
init完成后開(kāi)始調(diào)用連接 startConnect();
startConnect: function () {var that = this;if (that.connectedDevice.state) return;that.connectedDevice.deviceId = "";that.connectedDevice.state = false;// 如果適配器已經(jīng)初始化不在調(diào)用初始化(重復(fù)初始化會(huì)報(bào)錯(cuò))if (this.adapterHasInit == undefined || this.adapterHasInit) return;wx.showLoading({title: '初始化藍(lán)牙',duration: 2000});// 開(kāi)啟藍(lán)牙適配器狀態(tài)監(jiān)聽(tīng)this.listenAdapterStateChange();// 初始化藍(lán)牙適配器狀態(tài)(必須步驟,否則無(wú)法進(jìn)行后續(xù)的任何操作)wx.openBluetoothAdapter({success: function (res) {console.log("初始化藍(lán)牙適配器成功");that.getBluetoothAdapterState();that.adapterHasInit = true;},fail: function (err) {console.log(err);wx.showLoading({title: '請(qǐng)開(kāi)藍(lán)牙',icon: 'loading',duration: 2000})}});}說(shuō)明:這段有注釋?zhuān)筒欢嗾f(shuō)了,比較簡(jiǎn)單。
在初始化藍(lán)牙適配器狀態(tài)成功后調(diào)用getBluetoothAdapterState()方法。
getBluetoothAdapterState: function () {var that = this;wx.getBluetoothAdapterState({success: function (res) {console.log(res);var available = res.available;that.isDiscovering = res.discovering;if (!available) {wx.showLoading({title: '請(qǐng)開(kāi)藍(lán)牙',icon: 'loading',duration: 2000})} else {if (!that.connectedDevice['state']) {that.judegIfDiscovering(res.discovering);}}},fail: function (err) {console.log(err);}})}說(shuō)明:此方法是用來(lái)獲取當(dāng)前藍(lán)牙狀態(tài)。
當(dāng)檢測(cè)到藍(lán)牙可用時(shí)調(diào)用judegIfDiscovering方法。
judegIfDiscovering: function (discovering) {var that = this;if (this.isConnectinng) return;wx.getConnectedBluetoothDevices({services: [that.serviceId],success: function (res) {console.log("獲取處于連接狀態(tài)的設(shè)備", res);var devices = res['devices'];if (devices[0]) {if (that.isAndroidPlatform) {wx.showToast({title: '藍(lán)牙連接成功',icon: 'success',duration: 2000});} else {that.getConnectedBluetoothDevices(256);}} else {if (discovering) {wx.showLoading({title: '藍(lán)牙搜索中'})} else {if (that.isAndroidPlatform) {that.startBluetoothDevicesDiscovery();} else {that.getConnectedBluetoothDevices(267);}}}},fail: function (err) {console.log('getConnectedBluetoothDevices err 264', err);if (that.isAndroidPlatform) {that.startBluetoothDevicesDiscovery();} else {that.getConnectedBluetoothDevices(277);}}});}說(shuō)明: 1、此方法是用來(lái)判斷是否正在掃描。 2、isAndroidPlatform 是通過(guò)小程序的getSystemInfo獲取到的判斷是安卓設(shè)備還是IOS設(shè)備。
如果是安卓設(shè)備調(diào)用startBluetoothDevicesDiscovery()開(kāi)啟掃描,如果是IOS設(shè)備調(diào)用getConnectedBluetoothDevices() 開(kāi)啟獲取已配對(duì)的藍(lán)牙設(shè)備。
startBluetoothDevicesDiscovery: function () {var that = this;if (!this.isAndroidPlatform) return;if (!this.connectedDevice['state']) {wx.getBluetoothAdapterState({success: function (res) {console.log(res);var available = res.available;that.isDiscovering = res.discovering;if (!available) {wx.showLoading({title: '請(qǐng)開(kāi)藍(lán)牙',icon: 'loading',duration: 2000})} else {if (res.discovering) {wx.showLoading({title: '藍(lán)牙搜索中'})} else {wx.startBluetoothDevicesDiscovery({services: [],allowDuplicatesKey: true,success: function (res) {that.onBluetoothDeviceFound();wx.showLoading({title: '藍(lán)牙搜索中'})},fail: function (err) {if (err.isDiscovering) {wx.showLoading({title: '藍(lán)牙搜索中'})} else {that.startDiscoveryTimer = setTimeout(function () {if (!that.connectedDevice.state) {that.startBluetoothDevicesDiscovery();}}, 5000)}}});}}},fail: function (err) {console.log(err);}})}說(shuō)明:
1、僅在安卓端設(shè)備上開(kāi)啟掃描附近藍(lán)牙設(shè)備。
2、在開(kāi)啟成功的回調(diào)中開(kāi)啟發(fā)現(xiàn)新藍(lán)牙設(shè)備的事件監(jiān)聽(tīng)onBluetoothDeviceFound()。
[mw_shl_code=javascript,true]onBluetoothDeviceFound: function () {var that = this;wx.onBluetoothDeviceFound(function (res) {console.log('new device list has founded');if (res.devices[0]) {var name = res.devices[0]['name'];if (name.indexOf('FeiZhi') != -1) {var deviceId = res.devices[0]['deviceId'];console.log(deviceId);that.deviceId = deviceId;if (!that.isConnecting) {that.startConnectDevices();}}}})}說(shuō)明: 1、此處對(duì)已發(fā)現(xiàn)的藍(lán)牙設(shè)備根據(jù)name屬性進(jìn)行了過(guò)濾。 2、當(dāng)篩選出含有需要連接的設(shè)備的name屬性的設(shè)備是獲取到deviceId,開(kāi)始連接調(diào)用startConnectDevices()方法。
startConnectDevices: function (ltype, array) {var that = this;clearTimeout(this.getConnectedTimer);clearTimeout(this.startDiscoveryTimer);this.getConnectedTimer = null;this.startDiscoveryTimer = null;this.isConnectinng = true;wx.showLoading({title: '正在連接'});that.stopBluetoothDevicesDiscovery();wx.createBLEConnection({deviceId: that.deviceId,success: function (res) {console.log('連接成功', res);wx.showLoading({title: '正在連接'});that.connectedDevice.state = true;that.connectedDevice.deviceId = that.deviceId;if (res.errCode == 0) {setTimeout(function () {that.getService(that.deviceId);}, 5000)}wx.onBLEConnectionStateChange(function (res) {console.log('連接變化', res);that.connectedDevice.state = res.connected;that.connectedDevice.deviceId = res.deviceId;if (!res.connected) {that.init('200');}});},fail: function (err) {console.log('連接失?。?#39;, err);wx.hideLoading();if (ltype == 'loop') {array = array.splice(0, 1);console.log(array);that.loopConnect(array);} else {if (that.isAndroidPlatform) {that.startBluetoothDevicesDiscovery();} else {that.getConnectedBluetoothDevices(488);}}},complete: function () {that.isConnectinng = false;}});}說(shuō)明: 1、開(kāi)啟連接后終止掃描(獲取已配對(duì))方法。 2、根據(jù)deviceId創(chuàng)建低功耗藍(lán)牙連接。如果連接成功,就繼續(xù)做后續(xù)讀寫(xiě)操作。 3、如果連接失敗根據(jù)設(shè)備系統(tǒng)分別調(diào)用startBluetoothDevicesDiscovery() 或 getConnectedBluetoothDevices();
getConnectedBluetoothDevices: function (n) {var that = this;that.isGettingConnected = true;wx.showLoading({title: '藍(lán)牙搜索中'});wx.getConnectedBluetoothDevices({services: [that.serviceId],success: function (res) {console.log("獲取處于連接狀態(tài)的設(shè)備", res);var devices = res['devices'],flag = false,index = 0,conDevList = [];devices.forEach(function (value, index, array) {if (value['name'].indexOf('FeiZhi') != -1) {// 如果存在包含F(xiàn)eiZhi字段的設(shè)備flag = true;index += 1;conDevList.push(value['deviceId']);that.deviceId = value['deviceId'];}});if (flag) {that.connectDeviceIndex = 0;that.loopConnect(conDevList);} else {that.failToGetConnected();}},fail: function (err) {that.failToGetConnected();},complete: function () {that.isGettingConnected = false;}});}說(shuō)明:如果獲取藍(lán)牙已配對(duì)的藍(lán)牙設(shè)備失敗了,或獲取到的列表為空調(diào)用failToGetConnected();
failToGetConnected: function () {var that = this;if (!that.getConnectedTimer) {clearTimeout(that.getConnectedTimer);that.getConnectedTimer = null;}that.getConnectedTimer = setTimeout(function () {wx.getBluetoothAdapterState({success: function (res) {console.log(res);var available = res.available;if (!available) {wx.showLoading({title: '請(qǐng)開(kāi)藍(lán)牙',icon: 'loading',duration: 2000})} else {if (!that.connectedDevice['state']) {that.getConnectedBluetoothDevices();}}},fail: function (err) {console.log(err);}})}, 5000);}說(shuō)明: 1、該方法調(diào)用成功后返回的devices是一個(gè)數(shù)組包含多個(gè)已經(jīng)系統(tǒng)配對(duì)的藍(lán)牙設(shè)備。 2、如果devices列表獲取到調(diào)用loopConnect()方法開(kāi)始遞歸調(diào)用連接藍(lán)牙設(shè)備。
loopConnect: function (array) {var that = this;var listLen = array.length;if (array[0]) {that.deviceId = array[0];if (!that.isConnecting) {that.startConnectDevices('loop', array);}} else {console.log('已配對(duì)的設(shè)備小程序藍(lán)牙連接失敗');if (!that.isAndroidPlatform) {that.getConnectedBluetoothDevices(431);}}}說(shuō)明:looConnect在創(chuàng)建連接的方法連接失敗后會(huì)操作刪除數(shù)組的第一個(gè)值,然后繼續(xù)調(diào)用該方法,直到其中所有的設(shè)備都連接過(guò)。 差點(diǎn)漏了:在app.js的onShow里調(diào)用init()方法。
1、安卓和IOS的藍(lán)牙連接在當(dāng)前版本中推薦采用不同方式。安卓設(shè)備直接使用小程序的藍(lán)牙連接,取消系統(tǒng)配對(duì)。IOS設(shè)備先系統(tǒng)配對(duì)在打開(kāi)小程序可以時(shí)效秒連接成功。 2、此版本的連接仍然有待完善,連接不會(huì)自動(dòng)終止(需要的可以自己加),會(huì)無(wú)限掃描重連,直到成功。 3、鏈接成功后的操作如果寫(xiě)入數(shù)據(jù)和開(kāi)啟notify需要同時(shí)進(jìn)行,建議先寫(xiě)入,后開(kāi)啟notify。(原因未知,否則必然出現(xiàn)10008錯(cuò)誤)。