VB.Net a serial port receive less than data-CodePudding

To send data

 '
Private Sub senddata_Click (ByVal sender As System. Object, ByVal e the As System. EventArgs) Handles senddata publishes the event. Click 
Dim strincoming As String 
Dim xx As String 
Dim yy As String 
Try 
SerialPort1. Write (senddata publishes the event. The Text, 0, 4) 
Threading. Thread.sleep (1000) 
If SerialPort1. BytesToRead & gt; 0 Then 
Threading. Thread.sleep (100) 'add delay 
Strincoming=SerialPort1. ReadExisting. ToString 'data in a read buffer 
SerialPort1. DiscardInBuffer () 
RXbox. Text=strincoming 

End the If 

Catch the ex As Exception 
MessageBox. Show (ex. Message) 
End the Try 
End Sub

Procedure as above senddata publishes the event to send data, RXbox for receiving data frame, a serial port has been opened, use a serial port assistant debug can transmit and receive, your program of senddata publishes the event enter 1 to receive RXbox are empty inside, please teach the master

CodePudding user response:

The same problem don't need to ask twice, see: http://bbs.csdn.net/topics/390985158? Page=1 # post - 398891893