• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 1390
  • Last Modified:

Open Serial Open in VB.NET


Can anybody tell me how to I write a code Open Serial COM Port in VB.NET? I have found a sample from http://www.codeworks.it/net/VBNetRs232.htm but I dont know how to add in into my project! Can provide me more information and example from others website?

Your help is highly appreciated!

1 Solution

Dim MSCOM As AxMSCommLib.AxMSComm
  MSCOM._CommPort = 1
        MSCOM.Settings = "38400,N,8,1"
        MSCOM.InputLen = 0
         MSCOM.PortOpen = True
        MSCOM.Enabled = True
        Timer1.Enabled = True

For get data do you need put a TIMER:

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick

        Dim MSCOM As AxMSCommLib.AxMSComm
        Dim datA As Object = MSCOM.Input
        rt.Text = rt.Text & datA

IF you need get some data not all data:

     Dim MSCOM As AxMSCommLib.AxMSComm
        Dim datA As Object = MSCOM.Input
        rt.Text = rt.Text & datA

'''''' the next linea indicate if the data contain keywork Password add the result in a textbox.

        If InStr(datos, "Password:") > 0 Then
rt.Text = rt.Text & datA
                    End If

If you need send data:

 MSCOM.Output = "Hello How Are ?"
            MSCOM.Output = (vbCrLf)

(vbCrLf) =  ENTER KEY.
kaifong78Author Commented:

Thank you for your reply. However MSComm32.ocx is not delivered with Visual Studio, I am using VB.NET. Please take a look this URL  http://ourworld.compuserve.com/homepages/richard_grier/NETCommOCX.htm

Code is quite similar with MSCOMM

        AxNETComm1.CommPort = 1
        AxNETComm1.PortOpen = True
        AxNETComm1.RThreshold = 1
        AxNETComm1.set_Output("Hello" & vbCr)

I have sucess to sent text to our Making System via RS203 with this code.

MSCOM.Output = "Hello How Are ?"
            MSCOM.Output = (vbCrLf)

The output only display in frist line -> Hello How Are ?

Do you know how do I sent a 2nd text to 2nd line?

example output:
Hello How Are You? -> 1st line in system screen
I am fine.  -> 2nd line in system screen

I have tried WriteLine but got error! Please help. Thanks

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now