我在可靠地读取蓝牙流方面遇到问题。这是我第一次使用蓝牙连接。该应用程序通过蓝牙模块与Arduino通信。它将发送命令并获得响应。
例如,响应应如下所示:100,200,300,400
这就是我得到的:1
如果我得到另一个响应(也如果它看起来完全不同),我会得到之前请求的其余响应:00,200,300,400
有时我甚至会得到空洞的回应。
以下是我用来读取和写入流的代码:
void BluetoothClientConnectCallback(IAsyncResult result)
{
try
{
BluetoothClient client = (BluetoothClient)result.AsyncState;
client.EndConnect(result);
NetworkStream stream = client.GetStream();
stream.ReadTimeout = 1000;
_frm.printMsg("Connected!", false);
byte[] receive = new byte[1024];
while (true)
{
while (!ready) ;
if (stopConnection == true)
{
return;
}
try
{
stream.Write(message, 0, message.Length);
}
catch
{
_frm.printMsg("Error occurred while writing stream.", true);
}
try
{
if (Commands.awaitresponse == true)
{
Array.Clear(receive, 0, receive.Length);
readMessage = "";
do
{
stream.Read(receive, 0, receive.Length);
readMessage += Encoding.ASCII.GetString(receive);
}
while (stream.DataAvailable);
_frm.printMsg("Received: " + readMessage, false);
Commands.awaitresponse = false;
}
}
catch
{
_frm.printMsg("Error occurred while receiving stream.", true);
}
ready = false;
}
}
catch
{
_frm.printMsg("Error occurred while connecting.", true);
}
}
我研究了一段时间,但无法找到解决方案。
经过更多的调试和测试,我自己找到了解决方案。
在阅读流之前,我添加了 1 个延迟Thread.Sleep(1000);
。
所有包现在都正确显示为红色。