微信小程式藍芽連線傳送資訊
阿新 • • 發佈：2019-01-10
///獲取應用例項 var app = getApp() Page({ data: { lanya: "", state: "", msg: "", sousuo: "", status: "", connectedDeviceId: "",//連線裝置Id devices: [], serviceId: "", writeCharacteristicId: "", notifyCharacteristicId: "", }, onLoad: function () { var that = this; wx.openBluetoothAdapter({ success: function (res) { console.log(res.errMsg); that.setData({ lanya: "初始化小程式藍芽" + res.errMsg }); }, fail: function (res) { console.log(res); that.setData({ lanya: "初始化小程式藍芽" + res.errMsg }); } }); }, adapterState: function () { //獲取本機藍芽介面卡狀態 var that = this; wx.getBluetoothAdapterState({ success: function (res) { console.log(res); that.setData({ state: res.errMsg }); } }); }, selectDevices: function () {//搜尋裝置 var that = this; wx.startBluetoothDevicesDiscovery({ allowDuplicatesKey: false, success: function (res) { //監聽藍芽介面卡狀態 wx.onBluetoothAdapterStateChange(function (res) { that.setData({ sousuo: res.discovering ? "在搜尋" : "未搜尋", status: res.available ? "可用" : "不可用", }); }); setTimeout(function () { that.getDevices(); }, 1000); } }); }, getDevices: function () { //獲取裝置列表 var that = this; wx.getBluetoothDevices({ success: function (res) { that.setData({ devices: res.devices }); //that.test(res.devices); } }); }, //停止搜尋周邊裝置 stop: function () { var that = this; wx.stopBluetoothDevicesDiscovery({ success: function (res) { that.setData({ sousuo: res.discovering ? "在搜尋" : "未搜尋", status: res.available ? "可用" : "不可用", }); } }) }, test: function (devices) { wx.onBluetoothDeviceFound(function (devices) { console.log(devices); function ab2hex(buffer) { var hexArr = Array.prototype.map.call( new Uint8Array(buffer), function (bit) { return ('00' + bit.toString(16)).slice(-2) } ) return hexArr.join(''); } console.log('new device list has founded'); console.log(ab2hex(devices.devices[0].advertisData)); }); }, connect: function (e) {//連線藍芽 var that = this; wx.showModal({ title: '提示', content: '確定連線此裝置嗎？', success: function (res) { if (res.confirm) { console.log('使用者點選確定'); var clickId = e.currentTarget.id; wx.createBLEConnection({ // 這裡的 deviceId 需要已經通過 createBLEConnection 與對應裝置建立連結 deviceId: clickId, success: function (res) { that.setData({ connectedDeviceId: clickId }); wx.showToast({ title: '成功', icon: 'success', duration: 2000 }); wx.getBLEDeviceServices({ // 這裡的 deviceId 需要已經通過 createBLEConnection 與對應裝置建立連結 deviceId: clickId, success: function (res) { console.log('device services:', res.services); that.setData({ service: res.services[1] }); } }); that.getService(clickId); setTimeout(function () { that.getCharacteristics(clickId, that.data.serviceId); }, 3000); wx.onBLEConnectionStateChange(function (res) { // 該方法回撥中可以用於處理連線意外斷開等異常情況 console.log(`device ${res.deviceId} state has changed, connected: ${res.connected}`) }); }, fail: function (res) { console.log(res.errMsg); } }); } else if (res.cancel) { console.log('使用者點選取消') } } }); }, getService: function (deviceId) { var that = this; wx.getBLEDeviceServices({ // 這裡的 deviceId 需要已經通過 createBLEConnection 與對應裝置建立連結 deviceId: deviceId, success: function (res) { console.log('device services:', res.services); that.setData({ serviceId: res.services[1].uuid }); } }); }, getCharacteristics: function (deviceId, serviceId) { var that = this; wx.getBLEDeviceCharacteristics({ // 這裡的 deviceId 需要已經通過 createBLEConnection 與對應裝置建立連結 deviceId: deviceId, // 這裡的 serviceId 需要在上面的 getBLEDeviceServices 介面中獲取 serviceId: serviceId, success: function (res) { console.log(res); console.log('device getBLEDeviceCharacteristics:', res.characteristics); for (var i = 0; i < res.characteristics.length; i++) { if (res.characteristics[i].properties.write && !res.characteristics[i].properties.read && !res.characteristics[i].properties.notify && !res.characteristics[i].properties.indicate) { that.setData({ writeCharacteristicId: res.characteristics[i].uuid }); } else if (!res.characteristics[i].properties.write && !res.characteristics[i].properties.read && res.characteristics[i].properties.notify && !res.characteristics[i].properties.indicate) { that.setData({ notifyCharacteristicId: res.characteristics[i].uuid }); } } console.log("writeCharacteristicId=" + that.data.writeCharacteristicId); console.log("notifyCharacteristicId=" + that.data.notifyCharacteristicId); wx.notifyBLECharacteristicValueChange({ state: true, // 啟用 notify 功能 // 這裡的 deviceId 需要已經通過 createBLEConnection 與對應裝置建立連結 deviceId: deviceId, // 這裡的 serviceId 需要在上面的 getBLEDeviceServices 介面中獲取 serviceId: serviceId, // 這裡的 characteristicId 需要在上面的 getBLEDeviceCharacteristics 介面中獲取 characteristicId: that.data.notifyCharacteristicId, success: function (res) { console.log('notifyBLECharacteristicValueChange success', res.errMsg); } }); that.onBLECharacteristicValueChange(); } }); }, writeMsg: function () { var that = this; let buffer = new ArrayBuffer(7); let dataView = new DataView(buffer); dataView.setUint8(0, 0xaa); dataView.setUint8(1, 0x04); dataView.setUint8(2, (1 << 7)); dataView.setUint8(3, (1 << 3 | 1)); dataView.setUint8(4, 1); dataView.setUint8(5, 1 << 2); // var buffer = new ArrayBuffer(7); // buffer[0] = ; // buffer[1] = ; // buffer[2] = (1 << 7) // buffer[3] = (1 << 3) | 1 // buffer[4] = 1; // buffer[5] = 10; console.log(buffer); wx.writeBLECharacteristicValue({ // 這裡的 deviceId 需要在上面的 getBluetoothDevices 或 onBluetoothDeviceFound 介面中獲取 deviceId: that.data.connectedDeviceId, // 這裡的 serviceId 需要在上面的 getBLEDeviceServices 介面中獲取 serviceId: that.data.serviceId, // 這裡的 characteristicId 需要在上面的 getBLEDeviceCharacteristics 介面中獲取 characteristicId: that.data.writeCharacteristicId, // 這裡的value是ArrayBuffer型別 value: buffer, success: function (res) { console.log('writeBLECharacteristicValue success', res.errMsg) } }); }, onBLECharacteristicValueChange: function () { console.log("start change listen"); wx.onBLECharacteristicValueChange(function (res) { console.log(`characteristic ${res.characteristicId} has changed, now is ${res.value}`) console.log(ab2hext(res.value)) }); }, closeBLEConnection: function () { //斷開藍芽連線 var that = this; wx.closeBLEConnection({ deviceId: that.data.connectedDeviceId, success: function (res) { console.log(res); } }) } });