导航网站模板,软件技术招聘信息,手机免费建网站软件,博客类网站怎么做蓝牙连接并通信方法封装大致步骤。
初始化蓝牙并搜索#xff1b;获取并启用service服务#xff1b;数据读取和监听设备返回数据
需要使用uniapp官方提供api#xff1a;
// 关闭蓝牙
uni.closeBluetoothAdapter({})
// 打开蓝牙
uni.openBluetoothAdapter({})
// 搜索附近…蓝牙连接并通信方法封装大致步骤。
初始化蓝牙并搜索获取并启用service服务数据读取和监听设备返回数据
需要使用uniapp官方提供api
// 关闭蓝牙
uni.closeBluetoothAdapter({})
// 打开蓝牙
uni.openBluetoothAdapter({})
// 搜索附近的蓝牙
uni.startBluetoothDevicesDiscovery({})
// 停止搜索
uni.stopBluetoothDevicesDiscovery({})
// 连接低功耗BLE蓝牙
uni.createBLEConnection({})
// 获取蓝牙设备所有服务(service)
uni.getBLEDeviceServices({})
// 获取蓝牙特征值
uni.getBLEDeviceCharacteristics({})
// 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({})
// 监听低功耗蓝牙设备的特征值变化事件
uni.onBLECharacteristicValueChange({})
// 读取低功耗蓝牙设备的特征值的二进制数据值
uni.readBLECharacteristicValue({})1、开启蓝牙适配器初始化蓝牙模块获取手机蓝牙是否打开
const getBluetoothState () {return new Promise((resolve, reject) {uni.openBluetoothAdapter({mode: central, // 主机模式success: (r) {console.log(蓝牙初始化成功);// 获取蓝牙的匹配状态uni.getBluetoothAdapterState({success: function(row) {console.log(蓝牙状态, row.available);if (row.available) {// 蓝牙连接成功开启蓝牙设备搜索resolve();} else {// 请开启蓝牙uni.showToast({title: 请开启蓝牙,icon: none,duration: 2000});reject();}},fail: function(err) {// 请开启蓝牙uni.showToast({title: 请开启蓝牙,icon: none,duration: 2000});reject();}})},fail: () {// 请开启蓝牙uni.showToast({title: 请开启蓝牙,icon: none,duration: 2000});reject();}});});
}2、开启蓝牙设备搜索
const discoveryBluetooth () {return new Promise((resolve) {uni.startBluetoothDevicesDiscovery({success(res) {uni.showLoading({title: 正在搜索设备,icon:none,duration: 2000});console.log(搜索蓝牙外围设备完成, res)setTimeout(() {// 监听寻找到的蓝牙设备resolve();}, 2000);}});});
}3、获取搜索到的设备信息
const getBluetoothDevices () {return new Promise((resolve, reject) {uni.getBluetoothDevices({success(res) {// 过滤掉name为空或者未知设备的设备let devices res.devices.filter(function(obj) {return obj.name ! obj.name ! 未知设备});devices devices.forEach(item {// 获取指定连接deviceIdif(item.name item.name.substring(0, 5) aaaa-){// aaaa-*********蓝牙设备型号根据需求选择设备型号// item.deviceId;}});},fail: function() {console.log(搜索蓝牙设备失败);reject();},complete: function() {console.log(蓝牙搜索完成);resolve();}});});
}4、关闭蓝牙搜索
const stopDiscoveryBluetooth () {uni.stopBluetoothDevicesDiscovery({success(r) {console.log(停止搜索蓝牙设备, r);}});
};5、连接蓝牙
const connectBluetooth () {return new Promise((resolve, reject) {uni.createBLEConnection({deviceId: deviceId, // 设备idsuccess() {// 蓝牙连接成功后关闭蓝牙搜索并获取服务idstopDiscoveryBluetooth();resolve();// 获取服务idgetServiceId();},fail() {console.log(蓝牙连接失败);reject();}});});
};6、获取服务id
const getServiceId () {uni.getBLEDeviceServices({deviceId: deviceId,success(res) {console.log(获取服务Id, res)// serviceId固定获取蓝牙设备某个服务中的所有特征值【读写属性】let model res.services[0];serviceId model.uuid;// 调用蓝牙监听和写入功能getCharacteId();},fail(err){console.log(获取服务失败, err);}})
};7、获取蓝牙低功耗设备某个服务中所有特征
const getCharacteId () {uni.getBLEDeviceCharacteristics({deviceId: deviceId, // 蓝牙设备idserviceId: serviceId, // 蓝牙服务UUIDsuccess(res) {console.log(数据监听, res);res.characteristics.forEach(item {// 003if (item.properties.notify true) {// 监听notify item.uuid;}// 002if (item.properties.write true) {// 写入let writeId item.uuid;}});},fail(err) {console.log(数据监听失败, err)}})
};8、监听设备返回数据启用低功耗蓝牙设备特征值变化时的notify功能
const startNotice () {uni.notifyBLECharacteristicValueChange({characteristicId: notify,deviceId: deviceId,serviceId: serviceId,state: true,success(res) {// 监听低功耗蓝牙设备的特征值变化uni.onBLECharacteristicValueChange(result {console.log(监听低功耗蓝牙设备的特征值变化, result);if (result.value) {console.log(设备返回数据, result.value)}})}});
};9、向蓝牙设备发送数据
const writeData (buffer) {return new Promise((resolve, reject) {uni.writeBLECharacteristicValue({characteristicId: uni.getStorageSync(writeId),deviceId: deviceId,serviceId: serviceId,value: buffer,success(res) {console.log(writeBLECharacteristicValue success, res);resolve();},fail(err) {console.log(报错了, err);reject();}});});
};封装完整方法
import { TextDecoder } from text-encoding-utf-8;
let bluetoothOpen false; // 手机蓝牙是否打开
let bluetoothConnect false; // 设备和蓝牙是否连接
let isHaveDevice false; // 是否查找到设备
let deviceId null; // 设备id
let serviceId null; // 服务id
let notify null; // 监听uuid
let writeId null; // 写入uuid
/*** 获取手机蓝牙是否打开*/
const getBluetoothState () {// 主机模式return new Promise((resolve, reject) {uni.openBluetoothAdapter({mode: central,success: (r) {console.log(蓝牙初始化成功);// 获取蓝牙的匹配状态uni.getBluetoothAdapterState({success: function(row) {console.log(蓝牙状态, row.available);if (row.available) {bluetoothOpen true;resolve();} else {// 请开启蓝牙bluetoothOpen false;bluetoothConnect false;reject();}},fail: function(err) {// 请开启蓝牙bluetoothOpen false;bluetoothConnect false;reject();}})},fail: () {// 请开启蓝牙bluetoothOpen false;bluetoothConnect false;reject();}});});
};
/*** 开始搜索蓝牙设备*/
const discoveryBluetooth () {return new Promise((resolve) {uni.startBluetoothDevicesDiscovery({success(res) {console.log(搜索蓝牙外围设备完成, res)setTimeout(() {resolve();}, 2000);}});})
};
// 关闭蓝牙搜索
const stopDiscoveryBluetooth () {uni.stopBluetoothDevicesDiscovery({success(r) {console.log(停止搜索蓝牙设备, r);}});
};
/*** 获取搜索到的设备信息*/
const getBluetoothDevices () {return new Promise((resolve, reject) {uni.getBluetoothDevices({success(res) {bluetoothConnect false;// 过滤掉name为空或者未知设备的设备let devices res.devices.filter(function(obj) {return obj.name ! obj.name ! 未知设备});devices devices.forEach(item {if(item.name item.name.substring(0, 5) aaaa-){deviceId item.deviceId;}});},fail: function() {console.log(搜索蓝牙设备失败);bluetoothConnect false;reject();},complete: function() {console.log(蓝牙搜索完成);// 是否具有当前设备if (deviceId) {isHaveDevice true;} else {isHaveDevice false;}resolve(isHaveDevice);}});});
}
/*** 连接蓝牙* deviceId 蓝牙设备id*/
const connectBluetooth () {return new Promise((resolve, reject) {uni.createBLEConnection({deviceId: deviceId, // 设备idsuccess() {bluetoothConnect true;// 蓝牙连接成功后关闭蓝牙搜索stopDiscoveryBluetooth();resolve();// 获取服务idgetServiceId();},fail() {bluetoothConnect false;console.log(蓝牙连接失败);reject();}});});
};
// 获取服务id
const getServiceId () {uni.getBLEDeviceServices({deviceId: deviceId,success(res) {console.log(获取服务Id, res)let model res.services[0];serviceId model.uuid;// 调用蓝牙监听和写入功能getCharacteId();}})
};
// 获取蓝牙低功耗设备某个服务中所有特征
const getCharacteId () {uni.getBLEDeviceCharacteristics({deviceId: deviceId, // 蓝牙设备idserviceId: serviceId, // 蓝牙服务UUIDsuccess(res) {console.log(数据监听, res);res.characteristics.forEach(item {// 003if (item.properties.notify true) {// 监听notify item.uuid;startNotice();}// 002if (item.properties.write true) {// 写入let writeId item.uuid;uni.setStorageSync(writeId, item.uuid);}});},fail(err) {console.log(数据监听失败, err)}})
};
// 启用低功耗蓝牙设备特征值变化时的notify功能
const startNotice () {uni.notifyBLECharacteristicValueChange({characteristicId: notify,deviceId: deviceId,serviceId: serviceId,state: true,success(res) {// 监听低功耗蓝牙设备的特征值变化uni.onBLECharacteristicValueChange(result {console.log(监听低功耗蓝牙设备的特征值变化, result);if (result.value) {let decoder new TextDecoder(utf-8);let data decoder.decode(result.value);console.log(帽子返回数据, data)}})}});
};
// 蓝牙发送数据
const writeData (buffer) {return new Promise((resolve, reject) {uni.writeBLECharacteristicValue({characteristicId: uni.getStorageSync(writeId),deviceId: deviceId,serviceId: serviceId,value: buffer,success(res) {console.log(writeBLECharacteristicValue success, res);resolve();},fail(err) {console.log(报错了, err);reject();}});});
};
export default {getBluetoothState,discoveryBluetooth,stopDiscoveryBluetooth,getBluetoothDevices,connectBluetooth,getServiceId,getCharacteId,startNotice,writeData
};使用案例
templateview classdevice_container/view
/templatescriptimport bluetooth from ../bluetooth.js;export default {data() {return {bluetoothStatus: false, // 蓝牙连接状态}},methods: {// 获取蓝牙和设备是否已连接initBluetooth() {let _this this;// 初始化蓝牙bluetooth.getBluetoothState().then(() {// 搜索外围蓝牙设备bluetooth.discoveryBluetooth().then(() {this.discoveryLoading true;// 获取蓝牙设备bluetooth.getBluetoothDevices().then((isHaveDevice) {if (isHaveDevice) {// 搜索到指定设备,连接蓝牙bluetooth.connectBluetooth().then(() {_this.bluetoothStatus true;}, () {_this.bluetoothStatus false;});} else {// 未搜到设备_this.bluetoothStatus false;}}, () {// 蓝牙搜索失败_this.bluetoothStatus false;});});}, () {// 未开启蓝牙_this.bluetoothStatus false;});},// 向设备发送数据writeBlueData() {let obj {cmd: 3,freq: 430125,speakable: 1};let objStr JSON.stringify(obj);let buffer new ArrayBuffer(objStr.length); // 每个字符占用2个字节let bufView new Uint8Array(buffer);for (let i 0; i objStr.length; i) {bufView[i] objStr.charCodeAt(i);}bluetooth.writeData(buffer);}},onShow() {// 获取蓝牙和设备连接状态this.initBluetooth();},}
/scriptstyle langscsspage {height: 100%;}
/style
