最近开发的一款移动app应用基于ionic3+ng5+cordova移动框架,需要处理蓝牙电子秤的数据接收处理，实现过程一波三折，不过最终还是能够顺利实现，蓝牙的读写，及广播的接收，接收的效果图如下。
TIM图片20180707163304.jpg
实现过程如下
步骤一 安装Cordova蓝牙插件,命令行如下
ionic cordova plugin add cordova-plugin-ble-central
npm install --save @ionic-native/ble
步骤二，app.module.ts文件中引入蓝牙插件
import { BLE } from '@ionic-native/ble';
providers: [ble]
步骤三，封装蓝牙基础插件
import { Injectable, Version } from '@angular/core';
import { BLE } from '@ionic-native/ble';
import { NativeService } from "./NativeService";
import { TipsService } from './TipService';
/**
* 处理蓝牙的业务方法
* @weijb
*/
@Injectable()
export class BleService {
static bleDievices = [];
constructor(private ble: BLE, private nativeService: NativeService, private tips: TipsService) {
}
/**
* 蓝牙初始化
* @weijb
*/
init() {
return new Promise((resolve, reject) => {
if(this.nativeService.isMobile()){
this.ble.isEnabled().then(res => {
resolve(true);
}, err => {
//开启蓝牙
this.enable().then(res => {
resolve(true);
})
})
}else{
reject(false);
}
})
}
/**
* 打开蓝牙
*/
enable() {
return new Promise((resolve, reject) => {
if (this.nativeService.isAndroid()) {
this.ble.enable().then(res => {
resolve(true)
}, err => {
this.tips.show('请手动开启蓝牙设备', 1000);
resolve(false);
})
} else {
this.tips.show('请手动开启蓝牙设备', 1000);
resolve(true);
}
})
}
//扫描设备
scan() {
//6s后停止扫描
setTimeout(res => {
this.ble.stopScan().then(res => { }, err => {
this.tips.show('停止蓝牙设备扫描失败')
})
}, 18000);
return this.ble.startScan([]);
}
//蓝牙设备连接
connect(divice:string) {
//alert(divice);
return new Promise((resolve,reject)=>{
this.ble.connect(divice).subscribe((data:any) => {
// console.log('日志',data);
// console.log('日志',data.characteristics[7]);
resolve(data.characteristics[7]);
if(this.nativeService.isIos()){
resolve(data.characteristics[1]);
}else{
resolve(data.characteristics[7]);
}
// resolve(data.characteristics.find(res => {
// return res.hasOwnProperty('properties') && res.properties.find(res=>{
// return res =='Read';
// })!=null;
// })) ;
},
error => {
this.tips.show(error.errorMessage,1200);
console.log('链接失败error',error);
reject({});
}
);
})
}
//读取蓝牙设备信息
read(divice: string, serviceUUID: string, characteristicUUID: string){
// {"id":"65:F9:FD:CA:76:A8","advertising":{},"rssi":-70,"services":["1800","1801","d0611e78-bbb4-4591-a5f8-487910ae4366","9fa480e0-4967-4542-9390-d343dc5d04ae"],"characteristics":[{"service":"1800","characteristic":"2a00","properties":["Read"]},{"service":"1800","characteristic":"2a01","properties":["Read"]},{"service":"1801","characteristic":"2a05","properties":["Indicate"],"descriptors":[{"uuid":"2902"}]},{"service":"d0611e78-bbb4-4591-a5f8-487910ae4366","characteristic":"8667556c-9a37-4c91-84ed-54ee27d90049","properties":["Write","Notify","ExtendedProperties"],"descriptors":[{"uuid":"2900"},{"uuid":"2902"}]},{"service":"9fa480e0-4967-4542-9390-d343dc5d04ae","characteristic":"af0badb1-5b99-43cd-917a-a77bc549e3cc","properties":["Write","Notify","ExtendedProperties"],"descriptors":[{"uuid":"2900"},{"uuid":"2902"}]}]}
// this.ble.read(divice)
// ble.read(device.id, $scope.serviceUUID, $scope.counterCharacteristic,
//var data = new Uint8Array(buffer);//Uint8Array对象：8 位无符号整数值的类型化数组。内容将初始化为 0。如果无法分配请求数目的字节，则将引发异常。
return this.ble.read(divice,serviceUUID,characteristicUUID);
}
//屏幕
startNotification(divice: string, serviceUUID: string, characteristicUUID: string){
return this.ble.startNotification(divice,serviceUUID,characteristicUUID);
}
stopNotification(divice: string, serviceUUID: string, characteristicUUID: string){
return this.ble.stopNotification(divice,serviceUUID,characteristicUUID);
}
notify(divice: string, serviceUUID: string, characteristicUUID: string){
}
}
