Question

所以我试图使用AT命令与gsm调制解调器通信，我正在尝试进行基本测试，通过发送命令AT并接收OK来确保调制解调器正常。问题是我收到“AT Blank Line OK”，有什么办法，所以当我发送AT时，我只看好了吗？

Imports System.IO.Ports

Public Class GUI
Dim Device As New System.IO.Ports.SerialPort()
Private Sub GUI_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)         Handles MyBase.Load
    Port.Text = "Select Port"
    For Each item As String In IO.Ports.SerialPort.GetPortNames
        Port.Items.Add(item)
    Next
    Device.BaudRate = 9600
    Device.Parity = Parity.None
    Device.StopBits = StopBits.One
    Device.DataBits = 8
    Device.Handshake = Handshake.RequestToSend
    Device.DtrEnable = True
    Device.RtsEnable = True
    Device.NewLine = vbCrLf
    Device.WriteTimeout = 5000
End Sub

Private Sub Port_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Port.SelectedIndexChanged
    Device.PortName = Port.SelectedItem.ToString
End Sub

Private Sub Send_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Send.Click
    Try
        Device.Open()
        Dim msg As String
        msg = Message.Text
        Device.DiscardInBuffer()
        Device.DiscardOutBuffer()
        Device.Write("AT" & vbCrLf)
        MsgBox(Device.ReadExisting())
    Catch ex As Exception
        MsgBox("Error!")
    End Try
    Device.Close()
End Sub
End Class

Answer 1

听起来调制解调器设置为Echo命令。要关闭此功能，请先尝试发送E0。

More info here

串口读取包括在vb.net中编写的内容

1 个答案: