正在复制的 BLE 设备列表

Question

您好，目前我正在开发一个名为 BLE Scanner 的 Ionic 项目。我一直在努力寻找解决方案，并最终设法连接到这些设备。以下是我在网上找到的代码：

home.ts（忽略DetailPage）

import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';
import { BLE } from '@ionic-native/ble';
import { DevicePage } from '../device/device';

@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage {

  devices: any[];
  isScanning:boolean;

  constructor(public navCtrl: NavController,
              private ble: BLE) {
    this.devices=[];
    this.isScanning =false;
  }

  startScanning(){
    console.log("Scanning ..");
    this.devices=[];
    this.isScanning=true;
    this.ble.startScan([]).subscribe(
      device => {
        this.devices.push(device);
      }
    );

    setTimeout(() => {
      this.ble.stopScan().then(() => {
      console.log("Scanning has stopped");
      console.log(JSON.stringify(this.devices))
      this.isScanning = false;
      });
      }, 5000);
  }

  connectToDevice(device){
    console.log("Connect To Device");
    console.log(JSON.stringify(this.devices));
    this.navCtrl.push(DevicePage, {
      device: device
    });
  }
}

和home.html

<ion-content>
  <ion-list inset>
    <ion-item-sliding *ngFor="let device of devices">
      <button ion-item (click)="connectToDevice(device)">
        <h2>Device: {{ device.name }}</h2>
        <p>ID: {{ device.id }}</p>
        <p>RRSI: {{ device.rssi }}</p>
      </button>
    </ion-item-sliding>
  </ion-list>
  <ion-spinner *ngIf="isScanning==true" name="circles"></ion-spinner>
</ion-content>

所以问题来了：由于RSSI不断波动，BLE设备列表被复制，我不知道如何在RSSI不断更新时只显示一次每个设备。

这是我当前的应用程序，您可以看到只有 1 个名为 RADUSB 的设备被多次显示

my current app

请帮我想办法解决这个问题。我感谢每一个建议。谢谢！

Answer 1

您正在 startScan 中插入列表。添加检查以查看它是否已包含该设备。

this.ble.startScan([]).subscribe(
      device => {
        if(this.devices.findIndex((dev:any)=>dev.id===device.id)==-1)
            this.devices.push(device);
      });

正在复制的 BLE 设备列表

List of BLE devices being duplicated

javascript

ionic-framework

ionic2

ionic-native

angular