如何使用以太网连接从秤上读取重量

Question

我有一台 Mettler Toledo XS32000L 秤，我只是想通过以太网连接和 VB.net (2010) 应用程序读取重量。我发现很多 information/code 用于串行（COM）连接，但没有用于以太网连接。

通讯方式：Client & Server 远程主机地址：192.168.0.2。远程主机端口号：8001 本地服务器端口号：8000（秤IP：192.168.0.1）

我可以通过回复 ping 体重秤。我曾尝试使用超级终端，但没有成功。任何帮助将不胜感激，希望这个 post 可以帮助许多其他人。谢谢！

其他资源

具有串行连接的 VB 应用程序的代码：http://control.com/thread/1240210560

另一个有用的 link（但不适合我）： http://vb.net-informations.com/communications/vb.net_socket_programming.htm

Answer 1

好的 - 尽管有批评，但经过数小时的研究，我将 post 找到解决方案。我创建了一个 TCP 客户端并修改了设置（IP、端口等）希望这对未来的程序员有所帮助！

Imports System.Net.Sockets

Public Class Form1

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Call Connect("192.168.0.1", "S" & vbCrLf)
End Sub

Shared Sub Connect(ByVal server As [String], ByVal message As [String])
    Try
        ' Create a TcpClient. 
        ' Note, for this client to work you need to have a TcpServer  
        ' connected to the same address as specified by the server, port 
        ' combination. 
        Dim port As Int32 = 8000
        Dim client As New TcpClient(server, port)

        ' Translate the passed message into ASCII and store it as a Byte array. 
        Dim data As [Byte]() = System.Text.Encoding.ASCII.GetBytes(message)

        ' Get a client stream for reading and writing. 
        '  Stream stream = client.GetStream(); 
        Dim stream As NetworkStream = client.GetStream()

        ' Send the message to the connected TcpServer. 
        stream.Write(data, 0, data.Length)

        'Console.WriteLine("Sent: {0}", message)
        MsgBox("Sent: {0} " & message)
        ' Receive the TcpServer.response. 
        ' Buffer to store the response bytes.
        data = New [Byte](256) {}

        ' String to store the response ASCII representation. 
        Dim responseData As [String] = [String].Empty

        ' Read the first batch of the TcpServer response bytes. 
        Dim bytes As Int32 = stream.Read(data, 0, data.Length)
        responseData = System.Text.Encoding.ASCII.GetString(data, 0, bytes)
        'Console.WriteLine("Received: {0}", responseData)
        MsgBox("Received: {0} " & responseData)

        ' Close everything.
        stream.Close()
        client.Close()
    Catch e As ArgumentNullException
        'Console.WriteLine("ArgumentNullException: {0}", e)
        MsgBox("ArgumentNullException: {0}" & e.Message)
    Catch e As SocketException
        'Console.WriteLine("SocketException: {0}", e)
        MsgBox("SocketException: {0}" & e.Message)
    End Try

    MsgBox("Got to this point in code")

    'Console.WriteLine(ControlChars.Cr + " Press Enter to continue...")
    'Console.Read()
End Sub 'Connect

End Class

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