离子 BLE 写入其他设备

Question

我的应用程序当前连接到我正在尝试使用的设备。

日志：我们试图发送的消息是“你好”

⚡️  [log] - WE ARE CURRENTLY CONNECTED
To Native Cordova ->  BLE writeWithoutResponse BLE46928892 ["options": 
[027B18C5-15E6-86C1-ADDC-B2475099CDA0, 6E400001-B5A3-F393-E0A9- 
E50E24DCCA9E, 6E400002-B5A3-F393-E0A9-E50E24DCCA9E, {
    0 = 72;
    1 = 69;
    2 = 76;
    3 = 76;
    4 = 79;
}]]
2020-03-17 16:16:19.223013-0400 App[5985:1842762] writeWithoutResponse
2020-03-17 16:16:19.223160-0400 App[5985:1842762] getData
2020-03-17 16:16:19.223308-0400 App[5985:1842762] Looking for 
6E400002-B5A3-F393-E0A9-E50E24DCCA9E with properties 4

我遇到的问题是 BLE 中的写入功能。

(method) BLE.write(deviceId: string, serviceUUID: string, characteristicUUID: string, value: 
ArrayBuffer): Promise<any>

.TS

import { BLE } from '@ionic-native/ble/ngx';

devices:any[] = [];
id;

constructor(
public plt: Platform,
private route: ActivatedRoute,
private ble: BLE,
private ngZone: NgZone,
private cd: ChangeDetectorRef,
) { }


connect(count:number){

this.ble.connect(this.devices[count].id).subscribe
(peripheralData => {
      console.log(peripheralData);

    },
    peripheralData => {
      console.log('disconnected');
    });;

    this.id = this.devices[count].id;

}

write(){
    if (this.ble.isConnected){
      console.log("WE ARE CURRENTLY CONNECTED");
    var string = "HELLO"

    var array = new Uint8Array(string.length);
    for (var x = 0, l = string.length; x < l; x++)
      {array[x] = string.charCodeAt(x);}

    this.ble.writeWithoutResponse(this.id, "6E400001-B5A3-F393-E0A9- 
    E50E24DCCA9E", 
    "6E400002-B5A3-F393-E0A9-E50E24DCCA9E", array);
  }
  else{
    console.log("WE ARE NOT CONNECTED");
  }

}

编辑：我把它变成了两个函数，所以我不必再担心承诺错误了。 日志显示我们正在调用该函数并且我们已连接到 BLE 设备。 尽管如此，该消息实际上并未发送。

Answer 1

它不漂亮，但它有效

.TS

import { BLE } from '@ionic-native/ble/ngx';


export class AddDeviceComponent implements OnInit {

routeParams;
SCAN_RESULT_COUNT = 20;
scanResult;
id;



constructor(
public plt: Platform,
private route: ActivatedRoute,
private ble: BLE,
private ngZone: NgZone,
private cd: ChangeDetectorRef,
) { }


connect(count:number){

this.ble.connect(this.devices[count].id).subscribe
(peripheralData => {
  console.log(peripheralData);

},
peripheralData => {
  console.log('disconnected');
});;

this.id = this.devices[count].id;

}



  write(){
if (this.ble.isConnected)
{
  console.log("WE ARE CURRENTLY CONNECTED");
var string = "HELLO"

var array = new Uint8Array(string.length);
for (var x = 0, l = string.length; x < l; x++) {
  array[x] = string.charCodeAt(x);
}


// this is what needed to be done
this.ble.writeWithoutResponse(this.id, "6E400001-B5A3-F393-E0A9- 
E50E24DCCA9E".toLowerCase(), 
 "6E400002-B5A3-F393-E0A9-E50E24DCCA9E".toLowerCase(), array.buffer);



}
else{
 console.log("WE ARE NOT CONNECTED HELP");
}

}
}