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此代码使用Java Bluecove Bluetooh Library可以正常工作。这只是探测 RFCCOMM 直接连接的主要方法。

我试图在基于“In The Hand 32Feet”实用程序库的 C# 中做同样的事情，我想发送一个文本命令并接收来自设备的响应。

对于基于 BlueCove 的 Java（工作正常！）

String serverURL = "btspp://XXXXXXXXXXXX:1;authenticate=false;encrypt=false;master=false";     
StreamConnection sc =  (StreamConnection) MicroeditionConnector.open(serverURL);
DataOutputStream  os = sc.openDataOutputStream();

String text = "Send command";
byte data[] = text.getBytes();

os.write(data);
os.flush();
os.close();      

BufferedReader reader = new BufferedReader(new InputStreamReader(sc.openInputStream()));
StringBuilder out = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
      System.out.println(line);
      out.append(line);
 }
System.out.println("Receive data" + out.toString());
reader.close();

For C# 基于在手 32 英尺

这是我目前尝试将其转换为 c#.... 但问题是我无法访问 peerStream 已关闭？（始终将 CanRead 返回为 false）。

正如您在 Java BlueCove 示例中所见，可以打开具有双重目的的连接：OutputStream 用于编写命令，而 InputStream 用于顺序读取结果

我可以用另一种方式做到这一点吗？

String address = "00:00:00:00:00:00";
Guid mUUID = new Guid("00000000-0000-0000-0000-0000500b34fb");

BluetoothAddress addr = BluetoothAddress.Parse(address);
var btEndpoint = new BluetoothEndPoint(addr, mUUID);
var btClient = new BluetoothClient();
btClient.connect(btEndpoint);

Stream peerStream = btClient.GetStream();
using (StreamWriter sw = new StreamWriter(peerStream))
{
   sw.WriteLine("Send command");
   sw.Flush();
   sw.Close();
}

if (peerStream.CanRead) 
{
  using (StreamReader sr = new StreamReader(peerStream))
   {
   while (sr.Peek() >= 0)
      {
         Debug.WriteLine("Receive data" + sr.ReadLine());
      }
   sr.Close();
   }       
}
btClient.Close();
btClient.Dispose();
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1 回答 1

1

我认为对 sw.Close() 的调用也会关闭底层流，因此在关闭 sw 后您无法从 peerStream 读取。

我会尝试这样的事情：

        String address = "00:00:00:00:00:00";
        Guid mUUID = new Guid("00000000-0000-0000-0000-0000500b34fb");

        BluetoothAddress addr = BluetoothAddress.Parse(address);
        var btEndpoint = new BluetoothEndPoint(addr, mUUID);
        var btClient = new BluetoothClient();
        btClient.connect(btEndpoint);

        using (Stream peerStream = btClient.GetStream())
        using (StreamWriter sw = new StreamWriter(peerStream))
        {
            sw.WriteLine("Send command");
            sw.Flush();

            if (peerStream.CanRead)
            {
                using (StreamReader sr = new StreamReader(peerStream))
                {
                    while (sr.Peek() >= 0)
                    {
                        Debug.WriteLine("Receive data" + sr.ReadLine());
                    }
                }
            }
        }
于 2017-01-17T14:23:42.140 回答