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所以我正在尝试使用 AT 命令与 gsm 调制解调器通话，我正在尝试通过发送命令 AT 并接收 OK 来进行基本测试以确保调制解调器正常。问题是我收到“AT Blank Line OK”，有什么办法让我发送 AT 时，我只读 OK？

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
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1 回答 1

4

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。

更多信息在这里

于 2012-08-30T21:08:46.597 回答