如何知道连接了哪个串口外部设备并从该设备读取数据? [英] How to know on which serial port external device is connected and read data from that device?

问题描述

我连接了 1 个设备，它生成了一些随机数，我想通过我的 Windows 应用程序读取该数字.

I have attached 1 device which generated some random number and i want to read that number through my Windows application.

我正在使用此代码:

public static void Main()
{
    SerialPort mySerialPort = new SerialPort("COM19");

    mySerialPort.BaudRate = 115200;
    mySerialPort.Parity = Parity.None;
    mySerialPort.StopBits = StopBits.One;
    mySerialPort.DataBits = 8;
    mySerialPort.Handshake = Handshake.None;

    mySerialPort.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler);

    mySerialPort.Open();

    Console.WriteLine("Press any key to continue...");
    Console.WriteLine();
    Console.ReadKey();
    mySerialPort.Close();
}

private static void DataReceivedHandler(object sender, SerialDataReceivedEventArgs e)
{
    SerialPort sp = (SerialPort)sender;
    string indata = sp.ReadExisting();
    Debug.Print("Data Received:");
    Debug.Print(indata);
}

使用此代码，我成功获取数据.

With this code I am successfully getting data.

但这里的问题是我已经硬编码了来自设备管理器的 com 端口(Com19) 我已经检查了我的设备连接到哪个端口，所以我已经硬编码了，但我不想要这样做.

But problem here is I have hardcoded my com port(Com19) that is from device manager I have checked that to which port my device is connected so I have hardcoded that but I don't want to do this.

相反，我将给用户 1 下拉列表，其中用户将只能看到用户设备连接到的端口.因此，当从这个连接的设备获取数据时，我将使用该用户选择的下拉端口.

Instead I will give user 1 dropdown in which user will see only that port to which user device is connected. So when fetching data from this connected device I will use that user selected dropdown port.

我对 Windows 应用程序非常陌生，从未做过任何与串口相关的事情.

I am very much new to windows application and never done anything related to serial port.

推荐答案

当我将 arduino 连接到 com 端口时.我已经使用了这段代码(假设 arduino 返回了带有来自 Arduino 的信息"的文本):

When I have arduino connected to com port. I have use this code (assuming that arduino returned text with "Info from Arduino" inside):

SerialPort currentPort; // global variables
bool ArduinoPortFound = false;

...

        try
        {
            string[] ports = SerialPort.GetPortNames();
            foreach (string port in ports)
            {
                currentPort = new SerialPort(port, 9600);
                if (ArduinoDetected())
                {
                    ArduinoPortFound = true;
                    break;
                }
                else
                {
                    ArduinoPortFound = false;
                }
            }
        }
        catch { }

......

        private bool ArduinoDetected()
    {
        try
        {
            currentPort.Open();
            System.Threading.Thread.Sleep(1000); 

            string returnMessage = currentPort.ReadLine();
            currentPort.Close();

            if (returnMessage.Contains("Info from Arduino"))
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        catch (Exception e)
        {
            return false;
        }
    }

更新:或者你也可以使用 Windows 管理规范 (WMI)

UPDATE: Or you can also use Windows Management Instrumentation (WMI)

这是关于它的文章:如何通过友好名称以编程方式查找 COM 端口

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