求大神指出下面的代码哪里有问题,运行后啥反应都没有,DataReceived和ErrorReceived事件也没有触发
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
Dim sendNum As String = "13712345678"
Dim message As String = "message"
If SerialPort1.IsOpen Then
SerialPort1.Close()
End If
Try
SerialPort1.Open()
SerialPort1.Write("AT+CMGF=1")
Catch ex As Exception
MsgBox(ex.Message)
Finally
SerialPort1.Close()
End Try
End Sub
Private Sub SerialPort1_DataReceived(sender As Object, e As SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived
MsgBox("DataReceived")
End Sub
Private Sub SerialPort1_ErrorReceived(sender As Object, e As SerialErrorReceivedEventArgs) Handles SerialPort1.ErrorReceived
MsgBox("ErrorReceived")
End Sub