鸿蒙跨端低功耗门磁报警系统开发指南原创

进修的泡芙

发布于 2025-6-23 12:53

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鸿蒙跨端低功耗门磁报警系统开发指南

一、项目概述

本文基于HarmonyOS的传感器管理、低功耗控制和蓝牙Mesh组网技术，开发一套低功耗门磁报警系统。该系统采用霍尔传感器事件驱动机制、蓝牙Mesh网络通信和异常振动过滤算法，并借鉴《鸿蒙跨端U同步》中的多设备同步技术，实现门磁状态的实时监测和多终端报警通知。

二、系统架构

±--------------------+ ±--------------------+ ±--------------------+
门磁设备 <-----> 蓝牙Mesh网络 <-----> 控制终端
(霍尔传感器节点) (Bluetooth Mesh) (手机/平板/网关)
±---------±---------+ ±---------±---------+ ±---------±---------+

±---------v----------+ ±---------v----------+ ±---------v----------+
传感器驱动模块网络通信模块报警管理模块
(事件驱动/滤波) (Mesh组网/同步) (状态监控/通知)

±--------------------+ ±--------------------+ ±--------------------+

三、核心代码实现
门磁服务实现

// src/main/ets/service/DoorSensorService.ts
import { distributedData } from ‘@ohos.data.distributedData’;
import { BusinessError } from ‘@ohos.base’;
import { sensor } from ‘@ohos.sensor’;
import { bluetooth } from ‘@ohos.bluetooth’;
import { mesh } from ‘@ohos.bluetooth.mesh’;
import { power } from ‘@ohos.power’;
import { notification } from ‘@ohos.notification’;
import { fileIo } from ‘@ohos.fileio’;
import { zlib } from ‘@ohos.zlib’;

interface DoorEvent {
timestamp: number;
eventType: ‘open’ ‘close’
‘tamper’;
deviceId: string;
isSynced: boolean;
interface DeviceStatus {

lastEventTime: number;
batteryLevel: number;
isArmed: boolean;
isSynced: boolean;
export class DoorSensorService {

private static instance: DoorSensorService;
private kvStore: distributedData.KVStore | null = null;
private readonly STORE_ID = ‘door_sensor_store’;
private hallSensorId: number = -1;
private accelSensorId: number = -1;
private doorEvents: DoorEvent[] = [];
private deviceStatus: DeviceStatus = {
lastEventTime: 0,
batteryLevel: 100,
isArmed: true,
isSynced: false
};
private meshNetwork: mesh.MeshNetwork | null = null;
private meshElement: mesh.Element | null = null;
private lastSyncTime: number = 0;
private readonly SYNC_INTERVAL = 5 60 1000; // 5分钟同步一次

private constructor() {
this.initKVStore();
this.loadLocalData();
this.initMeshNetwork();
public static getInstance(): DoorSensorService {

if (!DoorSensorService.instance) {
  DoorSensorService.instance = new DoorSensorService();

return DoorSensorService.instance;

private async initKVStore(): Promise<void> {

try {
  const options: distributedData.KVManagerConfig = {
    bundleName: 'com.example.doorsensor',
    userInfo: {
      userId: '0',
      userType: distributedData.UserType.SAME_USER_ID

};

  const kvManager = distributedData.createKVManager(options);
  this.kvStore = await kvManager.getKVStore({
    storeId: this.STORE_ID,
    options: {
      createIfMissing: true,
      encrypt: false,
      backup: false,
      autoSync: true,
      kvStoreType: distributedData.KVStoreType.SINGLE_VERSION

});

  this.kvStore.on('dataChange', distributedData.SubscribeType.SUBSCRIBE_TYPE_REMOTE, (data) => {
    this.handleRemoteDataChange(data);
  });

catch (e) {

  console.error(Failed to initialize KVStore. Code: {e.code}, message: {e.message});

}

private async loadLocalData(): Promise<void> {
try {
const eventFile = await fileIo.open(‘data/door_events.bin’, 0o666);
const eventData = await fileIo.read(eventFile.fd, new ArrayBuffer(0));
await fileIo.close(eventFile.fd);

  if (eventData) {
    const decompressed = await zlib.deflateSync(eventData);
    this.doorEvents = JSON.parse(String.fromCharCode.apply(null, new Uint8Array(decompressed)));

const statusFile = await fileIo.open(‘data/device_status.bin’, 0o666);

  const statusData = await fileIo.read(statusFile.fd, new ArrayBuffer(0));
  await fileIo.close(statusFile.fd);
  
  if (statusData) {
    const decompressed = await zlib.deflateSync(statusData);
    this.deviceStatus = JSON.parse(String.fromCharCode.apply(null, new Uint8Array(decompressed)));

} catch (e) {

  console.log('No local data found or error reading file');

// 清理过期事件 (保留最近7天)

this.cleanupOldEvents();

private async saveLocalData(): Promise<void> {

try {
  // 确保目录存在
  await fileIo.mkdir('data');
  
  // 保存门磁事件
  const eventStr = JSON.stringify(this.doorEvents);
  const eventCompressed = await zlib.inflateSync(new Uint8Array(eventStr.split('').map(c => c.charCodeAt(0))));
  
  const eventFile = await fileIo.open('data/door_events.bin', 0o666 | fileIo.OpenMode.CREATE);
  await fileIo.write(eventFile.fd, eventCompressed.buffer);
  await fileIo.close(eventFile.fd);
  
  // 保存设备状态
  const statusStr = JSON.stringify(this.deviceStatus);
  const statusCompressed = await zlib.inflateSync(new Uint8Array(statusStr.split('').map(c => c.charCodeAt(0))));
  
  const statusFile = await fileIo.open('data/device_status.bin', 0o666 | fileIo.OpenMode.CREATE);
  await fileIo.write(statusFile.fd, statusCompressed.buffer);
  await fileIo.close(statusFile.fd);

catch (e) {

  console.error(Failed to save local data. Code: {e.code}, message: {e.message});

}

private cleanupOldEvents(): void {
const now = Date.now();
const sevenDaysAgo = now - 7 24 60 60 1000;
this.doorEvents = this.doorEvents.filter(event => event.timestamp >= sevenDaysAgo);
private async initMeshNetwork(): Promise<void> {

try {
  // 检查蓝牙是否开启
  if (!bluetooth.getState()) {
    await bluetooth.enable();

// 创建Mesh网络

  this.meshNetwork = await mesh.createMeshNetwork({
    networkId: 'door_sensor_network',
    ivIndex: 0,
    flags: 0
  });
  
  // 添加设备到Mesh网络
  this.meshElement = await this.meshNetwork.createElement({
    location: 0x0100,
    models: [{
      modelId: 0x1000, // 自定义门磁模型ID
      subscribe: ['door_status'],
      publish: 'door_events'
    }]
  });
  
  // 订阅Mesh消息
  this.meshNetwork.on('message', (message) => {
    this.handleMeshMessage(message);
  });

catch (e) {

  console.error(Failed to initialize mesh network. Code: {e.code}, message: {e.message});

}

public async startMonitoring(): Promise<boolean> {
try {
// 启动霍尔传感器 (事件驱动模式)
this.hallSensorId = await sensor.on(sensor.SensorId.HALL, {
interval: sensor.SensorFrequency.SENSOR_DELAY_FASTEST,
callback: (data) => {
this.handleHallEvent(data);
});

  // 启动加速度计 (用于振动检测)
  this.accelSensorId = await sensor.on(sensor.SensorId.ACCELEROMETER, {
    interval: sensor.SensorFrequency.SENSOR_DELAY_NORMAL,
    callback: (data) => {
      this.handleAccelEvent(data);

});

  // 启用低功耗模式
  await power.enablePowerMode(power.PowerMode.LOW_POWER, 'Door sensor monitoring');
  
  return true;

catch (e) {

  console.error(Failed to start monitoring. Code: {e.code}, message: {e.message});
  return false;

}

private async handleHallEvent(data: sensor.HallResponse): Promise<void> {
const now = Date.now();

// 防抖处理 (避免短时间内重复触发)
if (now - this.deviceStatus.lastEventTime < 1000) {
  return;

// 创建门磁事件

const eventType = data.status ? 'open' : 'close';
const newEvent: DoorEvent = {
  timestamp: now,
  eventType,
  deviceId: this.getDeviceId(),
  isSynced: false
};

this.doorEvents.push(newEvent);
this.deviceStatus.lastEventTime = now;
this.deviceStatus.isSynced = false;

// 通过Mesh网络广播事件
if (this.meshNetwork && this.meshElement) {
  try {
    await this.meshElement.publish({
      modelId: 0x1000,
      opcode: 0xC1, // 自定义操作码
      parameters: JSON.stringify(newEvent)
    });

catch (e) {

    console.error(Failed to publish mesh message. Code: {e.code}, message: {e.message});

}

// 如果系统处于布防状态，触发报警
if (this.deviceStatus.isArmed && eventType === 'open') {
  this.triggerAlarm('door_open', 门被打开 - ${new Date(now).toLocaleTimeString()});

// 保存并同步数据

await this.saveLocalData();

if (now - this.lastSyncTime > this.SYNC_INTERVAL) {
  await this.syncData();
  this.lastSyncTime = now;

}

private async handleAccelEvent(data: sensor.AccelerometerResponse): Promise<void> {
// 振动检测算法
const vibrationLevel = Math.sqrt(
data.x data.x + data.y data.y + data.z * data.z
);

// 振动阈值 (可根据实际调整)
const vibrationThreshold = 15;

if (vibrationLevel > vibrationThreshold) {
  // 防抖处理
  const now = Date.now();
  if (now - this.deviceStatus.lastEventTime < 1000) {
    return;

// 创建防拆事件

  const newEvent: DoorEvent = {
    timestamp: now,
    eventType: 'tamper',
    deviceId: this.getDeviceId(),
    isSynced: false
  };
  
  this.doorEvents.push(newEvent);
  this.deviceStatus.lastEventTime = now;
  this.deviceStatus.isSynced = false;
  
  // 通过Mesh网络广播事件
  if (this.meshNetwork && this.meshElement) {
    try {
      await this.meshElement.publish({
        modelId: 0x1000,
        opcode: 0xC1,
        parameters: JSON.stringify(newEvent)
      });

catch (e) {

      console.error(Failed to publish mesh message. Code: {e.code}, message: {e.message});

}

  // 触发防拆报警
  this.triggerAlarm('tamper_detected', 检测到异常振动 - ${new Date(now).toLocaleTimeString()});
  
  // 保存并同步数据
  await this.saveLocalData();
  
  if (now - this.lastSyncTime > this.SYNC_INTERVAL) {
    await this.syncData();
    this.lastSyncTime = now;

}

private async handleMeshMessage(message: mesh.Message): Promise<void> {

try {
  if (message.opcode === 0xC1) {
    const event = JSON.parse(message.parameters) as DoorEvent;
    
    // 避免处理自己的消息
    if (event.deviceId === this.getDeviceId()) return;
    
    // 合并远程事件
    const existing = this.doorEvents.find(e => 
      e.timestamp === event.timestamp && 
      e.deviceId === event.deviceId
    );
    
    if (!existing) {
      this.doorEvents.push(event);
      
      // 如果系统处于布防状态，触发报警
      if (this.deviceStatus.isArmed && (event.eventType = 'open' || event.eventType = 'tamper')) {
        const alarmType = event.eventType === 'open' ? 'door_open' : 'tamper_detected';
        const alarmMsg = event.eventType === 'open' ? 
          远程门被打开 - ${new Date(event.timestamp).toLocaleTimeString()} :
          检测到远程异常振动 - ${new Date(event.timestamp).toLocaleTimeString()};
        
        this.triggerAlarm(alarmType, alarmMsg);

await this.saveLocalData();

} else if (message.opcode === 0xC2) {

    // 处理状态同步消息
    const status = JSON.parse(message.parameters) as DeviceStatus;
    this.mergeDeviceStatus(status);

} catch (e) {

  console.error(Failed to handle mesh message. Code: {e.code}, message: {e.message});

}

private async triggerAlarm(type: string, message: string): Promise<void> {
// 发送本地通知
try {
await notification.publish({
id: 1,
contentType: notification.ContentType.NOTIFICATION_CONTENT_BASIC_TEXT,
normal: {
title: ‘门磁报警’,
text: message,
additionalText: new Date().toLocaleTimeString()
});

catch (e) {

  console.error(Failed to publish notification. Code: {e.code}, message: {e.message});

// 通过Mesh网络广播报警

if (this.meshNetwork && this.meshElement) {
  try {
    await this.meshElement.publish({
      modelId: 0x1000,
      opcode: 0xC3, // 报警操作码
      parameters: JSON.stringify({
        type,
        message,
        timestamp: Date.now(),
        deviceId: this.getDeviceId()
      })
    });

catch (e) {

    console.error(Failed to publish alarm message. Code: {e.code}, message: {e.message});

}

private getDeviceId(): string {

// 实际应用中应获取真实设备ID
return 'door_sensor_' + Math.random().toString(36).substr(2, 9);

private async syncData(): Promise<void> {

if (!this.kvStore) return;

try {
  // 同步门磁事件
  const unsyncedEvents = this.doorEvents.filter(e => !e.isSynced);
  if (unsyncedEvents.length > 0) {
    await this.kvStore.put('door_events', { value: unsyncedEvents });
    this.doorEvents.forEach(e => {
      if (!e.isSynced) e.isSynced = true;
    });

// 同步设备状态

  if (!this.deviceStatus.isSynced) {
    await this.kvStore.put('device_status', { value: this.deviceStatus });
    this.deviceStatus.isSynced = true;

} catch (e) {

  console.error(Failed to sync data. Code: {e.code}, message: {e.message});

}

private handleRemoteDataChange(data: distributedData.ChangeData): void {
data.insertEntries.forEach((entry: distributedData.Entry) => {
if (entry.key === ‘door_events’) {
const remoteEvents = entry.value.value as DoorEvent[];
this.mergeDoorEvents(remoteEvents);
else if (entry.key === ‘device_status’) {

    const remoteStatus = entry.value.value as DeviceStatus;
    this.mergeDeviceStatus(remoteStatus);

});

private mergeDoorEvents(remoteEvents: DoorEvent[]): void {

remoteEvents.forEach(remote => {
  const existing = this.doorEvents.find(local => 
    local.timestamp === remote.timestamp && 
    local.deviceId === remote.deviceId
  );
  
  if (!existing) {
    this.doorEvents.push(remote);

});

// 按时间排序
this.doorEvents.sort((a, b) => a.timestamp - b.timestamp);

private mergeDeviceStatus(remoteStatus: DeviceStatus): void {

// 采用更严格的布防状态
if (remoteStatus.isArmed && !this.deviceStatus.isArmed) {
  this.deviceStatus.isArmed = true;

// 更新电池电量 (取最小值)

this.deviceStatus.batteryLevel = Math.min(
  this.deviceStatus.batteryLevel,
  remoteStatus.batteryLevel
);

public async armSystem(armed: boolean): Promise<void> {

this.deviceStatus.isArmed = armed;
this.deviceStatus.isSynced = false;

// 通过Mesh网络广播状态变更
if (this.meshNetwork && this.meshElement) {
  try {
    await this.meshElement.publish({
      modelId: 0x1000,
      opcode: 0xC2, // 状态变更操作码
      parameters: JSON.stringify(this.deviceStatus)
    });

catch (e) {

    console.error(Failed to publish status change. Code: {e.code}, message: {e.message});

}

await this.saveLocalData();
await this.syncData();

public getRecentEvents(count: number = 10): DoorEvent[] {

return this.doorEvents.slice(-count).reverse();

public getDeviceStatus(): DeviceStatus {

return this.deviceStatus;

public async stopMonitoring(): Promise<void> {

if (this.hallSensorId !== -1) {
  await sensor.off(this.hallSensorId);
  this.hallSensorId = -1;

if (this.accelSensorId !== -1) {

  await sensor.off(this.accelSensorId);
  this.accelSensorId = -1;

await power.disablePowerMode(power.PowerMode.LOW_POWER);

await this.saveLocalData();
await this.syncData();

public async destroy(): Promise<void> {

await this.stopMonitoring();

if (this.meshNetwork) {
  this.meshNetwork.off('message');
  await mesh.destroyMeshNetwork(this.meshNetwork);

if (this.kvStore) {

  this.kvStore.off('dataChange');

}

门磁监控组件实现

// src/main/ets/components/DoorMonitor.ets
@Component
export struct DoorMonitor {
private doorService = DoorSensorService.getInstance();
@State recentEvents: DoorEvent[] = [];
@State deviceStatus: DeviceStatus = {
lastEventTime: 0,
batteryLevel: 100,
isArmed: false,
isSynced: false
};
@State isMonitoring: boolean = false;
private timer: number = 0;

aboutToAppear(): void {
this.loadData();
this.startMonitoring();
this.startAutoRefresh();
aboutToDisappear(): void {

this.stopAutoRefresh();

private loadData(): void {

this.recentEvents = this.doorService.getRecentEvents();
this.deviceStatus = this.doorService.getDeviceStatus();

private async startMonitoring(): Promise<void> {

this.isMonitoring = await this.doorService.startMonitoring();

private startAutoRefresh(): void {

this.timer = setInterval(() => {
  this.loadData();
}, 60000); // 每分钟刷新一次

private stopAutoRefresh(): void {

if (this.timer) {
  clearInterval(this.timer);
  this.timer = 0;

}

build() {
Column() {
// 标题
Text(‘门磁报警系统’)
.fontSize(24)
.fontWeight(FontWeight.Bold)
.margin({ bottom: 20 });

  // 状态卡片
  this.buildStatusCard();
  
  // 控制按钮
  Row() {
    Button(this.isMonitoring ? '停止监控' : '开始监控')
      .type(ButtonType.Capsule)
      .width('45%')
      .height(50)
      .backgroundColor(this.isMonitoring ? '#4CAF50' : '#F44336')
      .fontColor('#FFFFFF')
      .onClick(() => {
        this.toggleMonitoring();
      });
    
    Button(this.deviceStatus.isArmed ? '解除布防' : '布防系统')
      .type(ButtonType.Capsule)
      .width('45%')
      .height(50)
      .backgroundColor(this.deviceStatus.isArmed ? '#F44336' : '#4CAF50')
      .fontColor('#FFFFFF')
      .margin({ left: 10 })
      .onClick(() => {
        this.toggleArmStatus();
      });

.margin({ top: 20, bottom: 20 });

  // 最近事件
  Text('最近事件记录')
    .fontSize(18)
    .fontWeight(FontWeight.Bold)
    .margin({ bottom: 10 });
  
  if (this.recentEvents.length > 0) {
    this.buildEventList();

else {

    Text('暂无事件记录')
      .fontSize(14)
      .fontColor('#666666');

}

.width('100%')
.height('100%')
.padding(20);

@Builder

private buildStatusCard() {
Column() {
// 电池状态
Row() {
Image($r(‘app.media.ic_battery’))
.width(24)
.height(24)
.margin({ right: 10 });

    Column() {
      Text('电池电量')
        .fontSize(14)
        .fontColor('#666666');
      
      Row() {
        Progress({
          value: this.deviceStatus.batteryLevel,
          total: 100,
          type: ProgressType.Linear
        })
        .width(150)
        .height(10);
        
        Text(${this.deviceStatus.batteryLevel}%)
          .fontSize(14)
          .margin({ left: 10 });

}

    .layoutWeight(1);

.margin({ bottom: 15 });

  // 系统状态
  Row() {
    Image($r('app.media.ic_security'))
      .width(24)
      .height(24)
      .margin({ right: 10 });
    
    Column() {
      Text('系统状态')
        .fontSize(14)
        .fontColor('#666666');
      
      Text(this.deviceStatus.isArmed ? '已布防' : '未布防')
        .fontSize(16)
        .fontColor(this.deviceStatus.isArmed ? '#4CAF50' : '#F44336');

.layoutWeight(1);

.margin({ bottom: 15 });

  // 最后事件
  Row() {
    Image($r('app.media.ic_history'))
      .width(24)
      .height(24)
      .margin({ right: 10 });
    
    Column() {
      Text('最后事件')
        .fontSize(14)
        .fontColor('#666666');
      
      if (this.deviceStatus.lastEventTime > 0) {
        Text({this.getLastEventType()} - {new Date(this.deviceStatus.lastEventTime).toLocaleTimeString()})
          .fontSize(16);

else {

        Text('无事件')
          .fontSize(16);

}

    .layoutWeight(1);

}

.width('100%')
.padding(15)
.backgroundColor('#FFFFFF')
.borderRadius(10)
.shadow({ radius: 5, color: '#E0E0E0', offsetX: 0, offsetY: 2 });

private getLastEventType(): string {

if (this.recentEvents.length === 0) return '无事件';

const lastEvent = this.recentEvents[0];
switch (lastEvent.eventType) {
  case 'open': return '门被打开';
  case 'close': return '门被关闭';
  case 'tamper': return '异常振动';
  default: return '未知事件';

}

@Builder
private buildEventList() {
List({ space: 10 }) {
ForEach(this.recentEvents, (event) => {
ListItem() {
Column() {
Row() {
Text(this.getEventTypeText(event.eventType))
.fontSize(16)
.fontWeight(FontWeight.Bold)
.layoutWeight(1);

          Text(new Date(event.timestamp).toLocaleTimeString())
            .fontSize(14)
            .fontColor('#666666');

Text(设备: ${event.deviceId.substring(0, 8)}…)

          .fontSize(14)
          .fontColor('#666666')
          .margin({ top: 5 });

.width(‘100%’)

      .padding(10)

.borderRadius(10)

    .backgroundColor('#FFFFFF')
    .shadow({ radius: 3, color: '#E0E0E0', offsetX: 0, offsetY: 1 });
  })

.width(‘100%’)

.height('40%')

private getEventTypeText(type: string): string {

switch (type) {
  case 'open': return '🚪 门被打开';
  case 'close': return '🚪 门被关闭';
  case 'tamper': return '⚠️ 异常振动';
  default: return '❓ 未知事件';

}

private async toggleMonitoring(): Promise<void> {
if (this.isMonitoring) {
await this.doorService.stopMonitoring();
this.isMonitoring = false;
else {

  this.isMonitoring = await this.doorService.startMonitoring();

}

private async toggleArmStatus(): Promise<void> {
const newStatus = !this.deviceStatus.isArmed;
await this.doorService.armSystem(newStatus);
this.deviceStatus.isArmed = newStatus;

prompt.showToast({
  message: newStatus ? '系统已布防' : '系统已解除布防',
  duration: 2000
});

}

主界面实现

// src/main/ets/pages/SecurityPage.ets
import { DoorSensorService } from ‘…/service/DoorSensorService’;
import { DoorMonitor } from ‘…/components/DoorMonitor’;

@Entry
@Component
struct SecurityPage {
@State activeTab: number = 0;
private doorService = DoorSensorService.getInstance();

build() {
Column() {
// 标题
Text(‘智能安防系统’)
.fontSize(24)
.fontWeight(FontWeight.Bold)
.margin({ bottom: 20 });

  // 标签页
  Tabs({ barPosition: BarPosition.Start }) {
    TabContent() {
      // 门磁监控标签页
      DoorMonitor()

.tabBar(‘门磁监控’);

    TabContent() {
      // 系统设置标签页
      this.buildSettingsTab()

.tabBar(‘系统设置’);

.barWidth(‘100%’)

  .barHeight(50)
  .width('100%')
  .height('80%')

.width(‘100%’)

.height('100%')
.padding(20);

@Builder

private buildSettingsTab() {
Column() {
Text(‘蓝牙Mesh设置’)
.fontSize(18)
.fontWeight(FontWeight.Bold)
.margin({ bottom: 20 });

  Row() {
    Text('网络状态:')
      .fontSize(16)
      .margin({ right: 10 });
    
    Text('已连接')
      .fontSize(16)
      .fontColor('#4CAF50');

.margin({ bottom: 30 });

  Text('设备列表')
    .fontSize(18)
    .fontWeight(FontWeight.Bold)
    .margin({ bottom: 20 });
  
  List({ space: 10 }) {
    ListItem() {
      Row() {
        Image($r('app.media.ic_door'))
          .width(40)
          .height(40)
          .margin({ right: 10 });
        
        Column() {
          Text('主门磁传感器')
            .fontSize(16);
          
          Text('电池: 85%')
            .fontSize(14)
            .fontColor('#666666');

.layoutWeight(1);

        Text('在线')
          .fontSize(14)
          .fontColor('#4CAF50');

.padding(10)

.borderRadius(10)

    .backgroundColor('#FFFFFF')
    .shadow({ radius: 3, color: '#E0E0E0', offsetX: 0, offsetY: 1 });
    
    ListItem() {
      Row() {
        Image($r('app.media.ic_door'))
          .width(40)
          .height(40)
          .margin({ right: 10 });
        
        Column() {
          Text('次门磁传感器')
            .fontSize(16);
          
          Text('电池: 72%')
            .fontSize(14)
            .fontColor('#666666');

.layoutWeight(1);

        Text('在线')
          .fontSize(14)
          .fontColor('#4CAF50');

.padding(10)

.borderRadius(10)

    .backgroundColor('#FFFFFF')
    .shadow({ radius: 3, color: '#E0E0E0', offsetX: 0, offsetY: 1 });

.width(‘100%’)

  .height('40%')
  .margin({ bottom: 30 });
  
  Button('添加新设备')
    .type(ButtonType.Capsule)
    .width('60%')
    .height(40)
    .backgroundColor('#2196F3')
    .fontColor('#FFFFFF');

.width(‘100%’)

.height('100%')
.padding(20);

}

四、与游戏同步技术的结合点
实时状态同步：借鉴游戏中玩家状态实时同步机制，优化门磁状态的跨设备同步

事件广播机制：类似游戏中的事件广播，实现报警信息的快速扩散

设备角色分配：参考游戏中的主机/客户端模式，确定主控设备和从属设备

网络优化策略：使用类似游戏中的网络优化技术，对报警数据进行高效传输

状态一致性保障：借鉴游戏中的状态同步机制，确保多设备间报警状态一致

五、关键特性实现
霍尔传感器事件驱动：

  private async handleHallEvent(data: sensor.HallResponse): Promise<void> {
 const now = Date.now();
 
 // 防抖处理 (避免短时间内重复触发)
 if (now - this.deviceStatus.lastEventTime < 1000) {
   return;

// 创建门磁事件

 const eventType = data.status ? 'open' : 'close';
 const newEvent: DoorEvent = {
   timestamp: now,
   eventType,
   deviceId: this.getDeviceId(),
   isSynced: false
 };
 
 this.doorEvents.push(newEvent);
 this.deviceStatus.lastEventTime = now;
 this.deviceStatus.isSynced = false;
 
 // 如果系统处于布防状态，触发报警
 if (this.deviceStatus.isArmed && eventType === 'open') {
   this.triggerAlarm('door_open', 门被打开 - ${new Date(now).toLocaleTimeString()});

}

蓝牙Mesh组网：

  private async initMeshNetwork(): Promise<void> {
 try {
   // 检查蓝牙是否开启
   if (!bluetooth.getState()) {
     await bluetooth.enable();

// 创建Mesh网络

   this.meshNetwork = await mesh.createMeshNetwork({
     networkId: 'door_sensor_network',
     ivIndex: 0,
     flags: 0
   });
   
   // 添加设备到Mesh网络
   this.meshElement = await this.meshNetwork.createElement({
     location: 0x0100,
     models: [{
       modelId: 0x1000, // 自定义门磁模型ID
       subscribe: ['door_status'],
       publish: 'door_events'
     }]
   });
   
   // 订阅Mesh消息
   this.meshNetwork.on('message', (message) => {
     this.handleMeshMessage(message);
   });

catch (e) {

   console.error(Failed to initialize mesh network. Code: {e.code}, message: {e.message});

}

异常振动过滤：

  private async handleAccelEvent(data: sensor.AccelerometerResponse): Promise<void> {
 // 振动检测算法
 const vibrationLevel = Math.sqrt(
   data.x  data.x + data.y  data.y + data.z * data.z
 );
 
 // 振动阈值 (可根据实际调整)
 const vibrationThreshold = 15;
 
 if (vibrationLevel > vibrationThreshold) {
   // 防抖处理
   const now = Date.now();
   if (now - this.deviceStatus.lastEventTime < 1000) {
     return;

// 创建防拆事件

   const newEvent: DoorEvent = {
     timestamp: now,
     eventType: 'tamper',
     deviceId: this.getDeviceId(),
     isSynced: false
   };
   
   // 触发防拆报警
   this.triggerAlarm('tamper_detected', 检测到异常振动 - ${new Date(now).toLocaleTimeString()});

}

低功耗优化：

  public async startMonitoring(): Promise<boolean> {
 try {
   // 启用低功耗模式
   await power.enablePowerMode(power.PowerMode.LOW_POWER, 'Door sensor monitoring');
   
   // 启动霍尔传感器 (事件驱动模式)
   this.hallSensorId = await sensor.on(sensor.SensorId.HALL, {
     interval: sensor.SensorFrequency.SENSOR_DELAY_FASTEST,
     callback: (data) => {
       this.handleHallEvent(data);

});

   // 启动加速度计 (低频率采样)
   this.accelSensorId = await sensor.on(sensor.SensorId.ACCELEROMETER, {
     interval: sensor.SensorFrequency.SENSOR_DELAY_NORMAL,
     callback: (data) => {
       this.handleAccelEvent(data);

});

   return true;

catch (e) {

   console.error(Failed to start monitoring. Code: {e.code}, message: {e.message});
   return false;

}

六、性能优化策略
事件防抖处理：

  // 防抖处理 (避免短时间内重复触发)

if (now - this.deviceStatus.lastEventTime < 1000) {
return;

智能数据同步：

  // 只有新数据时才触发同步

if (now - this.lastSyncTime > this.SYNC_INTERVAL) {
await this.syncData();
this.lastSyncTime = now;

本地缓存优先：

  public getRecentEvents(count: number = 10): DoorEvent[] {
 // 先从内存缓存读取
 return this.doorEvents.slice(-count).reverse();

资源释放管理：

  public async destroy(): Promise<void> {
 await this.stopMonitoring();
 
 if (this.meshNetwork) {
   this.meshNetwork.off('message');
   await mesh.destroyMeshNetwork(this.meshNetwork);

if (this.kvStore) {