o2o网站建设好么,开个电商公司需要多少钱,营销型网站建设思路,wordpress 小工具 调用1.前言
微信小程序中连接蓝牙设备#xff0c;信息写入流程 1、检测当前使用设备#xff08;如自己的手机#xff09;是否支持蓝牙/蓝牙开启状态 wx:openBluetoothAdapter({}) 2、如蓝牙已开启状态#xff0c;检查蓝牙适配器的状态 wx.getBluetoothAdapterState({}) 3、添加…1.前言
微信小程序中连接蓝牙设备信息写入流程 1、检测当前使用设备如自己的手机是否支持蓝牙/蓝牙开启状态 wx:openBluetoothAdapter({}) 2、如蓝牙已开启状态检查蓝牙适配器的状态 wx.getBluetoothAdapterState({}) 3、添加监听蓝牙适配器状态变化 wx.onBluetoothAdapterStateChange({}) 4、搜索附近蓝牙设备 wx.startBluetoothDevicesDiscovery({}) 5、监听搜索的到设备 wx.onBluetoothDeviceFound({}) 遍历设备列表找到和macAddr看自己家的蓝牙装置的物理地址匹配的设备的deviceId 6、连接想要连接的切匹配成功的设备 wx.createBLEConnection({}) 7、获取连接成功的设备的设备服务servicesID wx.getBLEDeviceServices({}) 8、获取设备特征id wx.getBLEDeviceCharacteristics({}) 9、向设备写入指令 wx.writeBLECharacteristicValue({})
以下是代码重点本人亲测有效集官网和百家之所长汇聚之大成入我门来使君不负观赏
#2. 小程序前端index.wxml
wxs moduleutils
module.exports.max function(n1, n2) {return Math.max(n1, n2)
}
module.exports.len function(arr) {arr arr || []return arr.length
}
/wxs
button bindtapopenBluetoothAdapter classprimary-btn 开始扫描/button
button bindtapcloseBLEConnection classdefault-btn 断开连接/button
button bindtapopendeng classsumit-btn 开灯/button
button bindtapguandeng classwarn-btn 关灯/buttonview classdevices_summary已发现 {{devices.length}} 个外围设备/view
scroll-view classdevice_list scroll-y scroll-with-animationview wx:for{{devices}} wx:keyindexdata-device-id{{item.deviceId}}data-name{{item.name || item.localName}}bindtapcreateBLEConnection classdevice_itemhover-classdevice_item_hoverview stylefont-size: 16px; color: #333;{{item.name}}/viewview stylefont-size: 10px信号强度: {{item.RSSI}}dBm ({{utils.max(0, item.RSSI 100)}}%)/viewview stylefont-size: 10pxUUID: {{item.deviceId}}/viewview stylefont-size: 10pxService数量: {{utils.len(item.advertisServiceUUIDs)}}/view/view
/scroll-viewview classconnected_info wx:if{{connected}}viewicon classicon-box-img typesuccess size33/iconview classicon-box-text {{name}}连接成功/view/view /view
3.小程序index.wxss page {color: #333;
}
.icon-box-img{height: 20px;float: left;margin-left: 20%;
}
.icon-box-text{height: 30px;line-height: 30px;margin-left:5px;float: left;
}.primary-btn{margin-top: 30rpx;/* border: rgb(7, 80, 68) 1px solid; */color: rgb(241, 238, 238);background-color: rgb(14, 207, 46);
}
.default-btn{margin-top: 30rpx;/* border: #333 1px solid; */color: rgb(243, 236, 236);background-color: rgb(189, 112, 25);
}.warn-btn{margin-top: 30rpx;/* border: #333 1px solid; */color: rgb(240, 231, 231);background-color: rgb(235, 10, 10);
}
.sumit-btn{margin-top: 30px;width: 60px;color: rgb(240, 231, 231);background-color: rgb(10, 100, 235);
}.devices_summary {margin-top: 30px;padding: 10px;font-size: 16px;
}
.device_list {height: 300px;margin: 50px 5px;margin-top: 0;border: 1px solid #EEE;border-radius: 5px;width: auto;
}
.device_item {border-bottom: 1px solid #EEE;padding: 10px;color: #666;
}
.device_item_hover {background-color: rgba(0, 0, 0, .1);
}
.connected_info {position: fixed;bottom: 10px;width: 80%;margin-left: 6%;background-color: #F0F0F0;padding: 10px;padding-bottom: 20px;margin-bottom: env(safe-area-inset-bottom);font-size: 18px;/* line-height: 20px; */color: #1da54d;text-align: center;/* height: 20px; */box-shadow: 0px 0px 3px 0px;
}
.connected_info .operation {position: absolute;display: inline-block;right: 30px;
}
4.小程序 index.ts const app getApp()function inArray(arr, key, val) {for (let i 0; i arr.length; i) {if (arr[i][key] val) {return i;}}return -1;
}// ArrayBuffer转16进度字符串示例
function ab2hex(buffer) {var hexArr Array.prototype.map.call(new Uint8Array(buffer),function (bit) {return (00 bit.toString(16)).slice(-2)})return hexArr.join();
}Page({data: {devices: [],connected: false,chs: [],},getCeshi() {wx.navigateTo({url: /pages/main/main,})},// 搜寻周边蓝牙openBluetoothAdapter() {//console.log(openBluetoothAdapter success)wx.openBluetoothAdapter({success: (res) {console.log(openBluetoothAdapter success, res)this.startBluetoothDevicesDiscovery()},fail: (res) {if (res.errCode 10001) {wx.onBluetoothAdapterStateChange(function (res) {console.log(onBluetoothAdapterStateChange, res)if (res.available) {this.startBluetoothDevicesDiscovery()}})}}})},// 停止搜寻周边蓝牙getBluetoothAdapterState() {wx.getBluetoothAdapterState({success: (res) {console.log(getBluetoothAdapterState, res)if (res.discovering) {this.onBluetoothDeviceFound()} else if (res.available) {this.startBluetoothDevicesDiscovery()}}})},// 开始搜寻附近的蓝牙外围设备startBluetoothDevicesDiscovery() {if (this._discoveryStarted) {return}this._discoveryStarted truewx.startBluetoothDevicesDiscovery({allowDuplicatesKey: true,success: (res) {console.log(startBluetoothDevicesDiscovery success, res)this.onBluetoothDeviceFound()},})},//停止搜寻附近的蓝牙外围设备。若已经找到需要的蓝牙设备并不需要继续搜索时建议调用该接口停止蓝牙搜索。stopBluetoothDevicesDiscovery() {wx.stopBluetoothDevicesDiscovery()},//监听搜索到新设备的事件onBluetoothDeviceFound() {wx.onBluetoothDeviceFound((res) {res.devices.forEach(device {if (!device.name !device.localName) {return}const foundDevices this.data.devicesconst idx inArray(foundDevices, deviceId, device.deviceId)const data {}if (idx -1) {data[devices[${foundDevices.length}]] device} else {data[devices[${idx}]] device}this.setData(data)})})},//连接蓝牙低功耗设备。createBLEConnection(e) {const ds e.currentTarget.datasetconst deviceId ds.deviceIdconst name ds.namewx.createBLEConnection({deviceId,success: (res) {this.setData({connected: true,name,deviceId,})this.getBLEDeviceServices(deviceId)}})this.stopBluetoothDevicesDiscovery()},closeBLEConnection() {wx.closeBLEConnection({deviceId: this.data.deviceId})this.setData({connected: false,chs: [],canWrite: false,})},//获取蓝牙低功耗设备所有服务。getBLEDeviceServices(deviceId) {console.log(deviceId , deviceId)wx.getBLEDeviceServices({deviceId,success: (res) {for (let i 0; i res.services.length; i) {//获取通过设备id多个特性服务serviceid 包含 读、写、通知、等特性服务// console.log(serviceId , res.services[2].uuid)// 通过上边注释解封排查到判断服务id 中第三个服务id 代表写入服务// isPrimary代表 判断服务id是否为主服务// if (res.services[2].isPrimary) {// this.getBLEDeviceCharacteristics(deviceId, res.services[2].uuid)// }//判断通过设备id获取的多个特性服务中是否有与蓝牙助手获取的写入特性服务相一致的serviceidif (res.services[i].uuid0000FFE0-0000-1000-8000-00805F9B34FB) {this.getBLEDeviceCharacteristics(deviceId, res.services[i].uuid) }}}})},//获取蓝牙低功耗设备某个服务中所有特征 (characteristic)。getBLEDeviceCharacteristics(deviceId, serviceId) {console.info(蓝牙的deviceId deviceId);console.info(蓝牙服务的serviceId serviceId);wx.getBLEDeviceCharacteristics({deviceId,serviceId,success: (res) {console.log(getBLEDeviceCharacteristics success, res.characteristics)for (let i 0; i res.characteristics.length; i) {let item res.characteristics[i]if (item.properties.read) {wx.readBLECharacteristicValue({deviceId,serviceId,characteristicId: item.uuid,})}if (item.properties.write) {this.setData({canWrite: true})this._deviceId deviceIdthis._serviceId serviceIdthis._characteristicId item.uuidconsole.info(写入第一步的characteristicId item.uuid);//初始化调用 写入信息的方法 1代表开灯this.writeBLECharacteristicValue(1)}if (item.properties.notify || item.properties.indicate) {wx.notifyBLECharacteristicValueChange({deviceId,serviceId,characteristicId: item.uuid,state: true,})}}},fail(res) {console.error(getBLEDeviceCharacteristics, res)}})// 操作之前先监听保证第一时间获取数据wx.onBLECharacteristicValueChange((characteristic) {const idx inArray(this.data.chs, uuid, characteristic.characteristicId)const data {}if (idx -1) {data[chs[${this.data.chs.length}]] {uuid: characteristic.characteristicId,value: ab2hex(characteristic.value)}} else {data[chs[${idx}]] {uuid: characteristic.characteristicId,value: ab2hex(characteristic.value)}}this.setData(data)})},/*** 写入的数据 格式转换* param str* returns 字符串 转 ArrayBuffer*/
hex2buffer(str) {console.info(写入的数据 str);//字符串 转 十六进制var val ;for (var i 0; i str.length; i) {if (val )val str.charCodeAt(i).toString(16);elseval , str.charCodeAt(i).toString(16);}//十六进制 转 ArrayBuffervar buffer new Uint8Array(val.match(/[\da-f]{2}/gi).map(function (h) {return parseInt(h, 16)})).buffer;return buffer;
},
//开灯
opendeng() {// 调用写入信息的方法 向蓝牙设备发送一个开灯的参数数据 , 1代表开灯var writeValue 1;this.writeBLECharacteristicValue(writeValue)},
//关灯
guandeng() {// 调用写入信息的方法 向蓝牙设备发送一个关灯的参数数据 , 0代表关灯var writeValue 0;this.writeBLECharacteristicValue(writeValue)},
writeBLECharacteristicValue(writeValue) {// 向蓝牙设备发送一个0x00的16进制数据// let buffer new ArrayBuffer(1)// let dataView new DataView(buffer)// dataView.setUint8(0, 0)//调用hex2buffer方法转化成ArrayBuffer格式console.log(获取传递参数writeValue的数据为,writeValue)var buffer this.hex2buffer(writeValue);console.log(获取二进制数据,buffer)//向低功耗蓝牙设备特征值中写入二进制数据。wx.writeBLECharacteristicValue({deviceId: this._deviceId,serviceId: this._serviceId,characteristicId: this._characteristicId,value: buffer,success (res) {console.log(成功写数据writeBLECharacteristicValue success, res)//如果 uni.writeBLECharacteristicValue 走 success 证明你已经把数据向外成功发送了但不代表设备一定就收到了。通常设备收到你发送过去的信息会返回一条消息给你而这个回调消息会在 uni.onBLECharacteristicValueChange 触发},fail(res) {console.error(失败写数据getBLEDeviceCharacteristics, res)}})
},
//断开与蓝牙低功耗设备的连接。closeBluetoothAdapter() {wx.closeBluetoothAdapter()this._discoveryStarted false},
})
5.疑难点
1.如果你不确定写入的特性服务值可以通过安卓蓝牙助手获取特性值 deviceIdmac地址、serviceId、characteristicId苹果手机蓝牙助手获得特性值deviceIduuid地址、serviceId、characteristicId
注意手机品类不同获取的deviceId的名称不同但serviceId、characteristicId是相同的
1.安卓手机蓝牙助手获取的信息
2.苹果手机蓝牙助手获取的信息 FFF0代表的serviceId全称0000FFF0-0000-1000-8000-00805F9B34FB
FFF3代表的characteristicId全称0000FFF3-0000-1000-8000-00805F9B34FB
最后
祝愿你能一次成功
代码直接复制粘贴到你的小程序中替换下你自己设备的写入特性serviceId值,
就可以测试了
最后如果还满意记得点下赞、收藏加关注、我也好回关相互进步!
