Using MSComm32.ocx Control For The Purpose Of Serial Port Communication?
Jun 16, 2010
In my application I am using MSComm32.ocx control for the purpose of serial port communication.
when i am using it I am getting a following error while writing data to the port.
"AxMSComm1.Output {"Exception from HRESULT: 0x800A018A (CTL_E_GETNOTSUPPORTED)"} Object "
I am writing the output to the port like below. AxMSComm1.Output ="Hello"
I mention the properties of the ocx control in the form load like below. AxMSComm1.CommPort = 1
AxMSComm1.Settings ="9600,N,8,1"
AxMSComm1.InputLen = 0
AxMSComm1.PortOpen =True
I searched for this error in the net.But I am not found any information for this issue.
can anybody explain why I am getting that error and how to resolve it???
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Jun 17, 2010
In my windows application I am using Mscomm32.ocx control for serial communication.
I set the control properties like below in the Form1_Load event.
AxMSComm1.CommPort = 1
AxMSComm1.Settings = "9600,N,8,1"
AxMSComm1.InputLen = 0
[Code]....
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May 17, 2012
I want to communicate Weigh bridge with my ORACLE Form serially. I have already import MSCOMM32.OCX in my Project and On Button Pressed I wrote a Program to Start Communication between Weigh Bridge and my form. I was stuck at GET_NUM_PROPERTY of MSCOMM32.OCX Package.
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Dec 30, 2009
i'm creating a windows form to send/receive data to/from serial port.At first : i send the data as string to the serial port .Second: i tried to read the string again for test the successfull transmission , but i recieved empty string
[Code]...
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Feb 9, 2009
I am using two serial port in my programm.What is want is, i need to receive data from one port and send on another port and vice a versa.This code receive data from one port but can't receive data from another port. I have tried to simulate this code by using hyper terminal and it works properly with both com port. Where as i have written code in Vb6 too and its is giving same problem as giving interupt while recieved data from one port but not giving interupt which receiving from another port. I know the another way to receive data is by using timer and read data by command as readline(), but what to do to make both the port gives interupt which receive data.Please help to find out the porblem, the code is in Vb.net and it is as under.[code]
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Dec 23, 2011
I am trying to get serial port communication working between two PC's.
My environment is: XP SP3, 9 pin serial ports on both ends, connected by a null modem cable, Visual Basic 2010 Express.
I have a sending routine and a receiving routine, both based on the on line documentation.
There are no Errors, Warnings or messages.
Problem: The receiving machine shows no sign of receiving a message sent by the sending PC. I have tried making the sending PC into the receiving PC - makes no difference.
My sending routine looks like this:
Sub SendSerialData(ByVal SendData As String)
'Send string to serial port
Using com1 As IO.Ports.SerialPort = My.Computer.Ports.OpenSerialPort("COM1", 9600, Parity.None, 8, StopBits.One)
[Code].....
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Apr 10, 2009
How do I implement Serial COM Port communication?
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Nov 14, 2011
I am trying to interface an instrument that I send orders to.An order consists of 4 lines which I am to write to the serial port one at a time and receive an ACK before sending the next line.I have interfaced in the past using the MSCOMM, I'm new to the Serial Port class. But even then I've always received data, never sent anything.My question is when I'm looping through my 4 lines of my order, at what point do I receive ACK? Obviously, not in the same function, right? And how do I know I received an ACK and can go on to output the next line?
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Dec 31, 2010
I'm trying to read data coming from a serial port. I simply want to ignore all other data besides the string "button_pushed". The device actually writes "button_pushed" to clean up the display when viewing the serial connection from console or similar. I can change this easily but I'd like to keep it if possible.
My code is as follows:
[Code]...
I'll get an IOException from readLine(). I tried using readExisting() which prevented the error but results in the block being executed twice (probably caused by the "") so the log reads "No data match" and "Data match" for one button push.I have a few questions. First, why does ReadLine cause an exception? I tried to negate that with is_closing but it still occurs. Second, will I run into problems using readExisting as it reads the entire buffer?
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Nov 1, 2010
I am working on an application on serial port communication with PLC machine. Now this communication is only done with one PLC at a time. So I m sending a query to PLC and until its responds back the application goes into wait mode. i.e. no other operations can be done, and an hourglass cursor should be displayed with all other components locked on the form. So how do I achieve this using vb.net?
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Aug 6, 2009
tell me the settings required for serial port communication
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Feb 22, 2012
I am using two computer to connect to each other via serial port, I have made a program in VB that allows me to read from the serial port then store whatever that character is to a variable. The only problem is I have to hit a button to read in from the serial port and pass the character to the variable. Is there any way to do this automatically?
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Feb 7, 2012
I am trying to create a client server application. I am going to make this simple so that a basic chat application. I have gone through these tutorials:
[Code]...
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Jul 9, 2007
I have a VB2005 application that sends and recieves data with another application (3rd party, not vb 2005) via COM port. When I run the apps on different computers they work great, they send all data to eachother and everything is fine. When I run them both on the same computer with either virtual null modem ports or with 2 hardware ports connected together via null modem cable they stop communicating.
[Code]....
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Sep 4, 2009
I have a VB.net app running on one computer, displaying text into 2 texboxes or labels.I need to see the two values in two sperate textboxes or labels from the two labels on another computer via a null modem serial adapter.
1st computer.
Code:
serialport1.writeline(label1.txt)
straight forward right?
2nd computer to read the data
Code:
Private Sub SerialPort1_DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived
dim s as new string = serialport1.readline()
label1.text = s
This is what I was thinking;
Code:
serialport.writeline(label1.text & label2.text
This would send the two values over the serial port. How would I seperate the two values and display them in two different texboxes?cannot use them together)Am I on the right path at all? Or using the serialport.writeline method won't work at all....
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Jun 16, 2010
I am using MSCOMM (mscomm32.ocx) for serial Comm. using VB.NET 2005:
Receiving Error: "AxMSComm1.Output {"Exception from HRESULT: 0x800A018A (CTL_E_GETNOTSUPPORTED)"} Object "
How to resolve this Issue, Below is the code snippet which i am using. [Code]
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Jun 21, 2006
A while ago I wrote a library which helps me simply text operations, serial communications, PLC interaction using OPC Automation, etc... My problem is with the vb6 serial control mscomm32.ocx. In my computer, I can use it with no problem. Everything works fine when testing serial control and my forms can open sucessfully. When I try to run a winform that uses Serial library (mscomm32.ocx) in a computer that doesn't have VB6 installed, I get the error "Common Language Runtime Debugging Services. Application has generated an exception that could not be handled. PRocess id=0xe0 (224). Thread id= 0x6f4 (1780)"
[Code]...
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Jul 17, 2009
Do someone know if there is a\\ USB control for the USB port communication? like the SerialPort control for the COM port.
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Nov 10, 2010
I'm writing some VB2008 code to control four 7-seg LEDs I bought from Velleman. They came with some example code in VB 5.0, and with instructions telling me to input 5 bytes at a time in the format Chr$() & Chr$() & etc. for the rest of the 5 bytes. When I try to do this using VB2008, it rejects the $ sign, so I've tried it using the Chr() format, which VB2008 allows. However, it doesn't work. Is Chr() the new version of Chr$() or are they different entities? In sending data to the LEDs, I'm using LiveComPort.WriteLine() as my command. (My serial port is called LiveComPort) I also tried it with LiveComPort.Write() asthe command. I know that my serial port and the LEDs are working, because they respond to the demo program provided by Velleman.
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Aug 16, 2011
i am a absolute beginner and i want to use vb to receive data from micro controller through serial port using rs232 standards, i found this code to receive the data serially, can any one tell me where should i paste this code, so that the data received will be displayed in message box.Private Sub DataReceived(ByVal sender As System.Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) HandlesSerialPort1.DataReceived
[Code]...
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Oct 26, 2011
The link below has code to connect to a modem thru the serial port but it is for an earlier version of VB. when I convert the code, it does not fully convert and has 4 errors that prevent building the project. can someone tell me what needs to be changed or added?
[URL]
Note: the error: not CLS-Compliant
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Dec 7, 2010
i trying to make a control for serial port to send a string "1" to serial port , but i don't want to use a form. I want to be able to save as .ost file or be able to input it into outlook 2003 macro to use as a script. can someone get me started on how to name, open, set, write to a serial port without using a form? just to use as a macro?
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Nov 18, 2009
All these days i used to program in Vb6.0. Now since from last 15 days I have been using Vb2008. In Vb6.0 I used MSCOMM for serial communications. Here in Vb2008 I found Serial port control equivalent to it. I somehow managed to learn how to send data using serial port control and set parameters like baudrate , stopbits , etc. But I' not getting how to get the received data. In VB 6.0 we used to use comEvReceive in OnComm event and used MSCOM1.Input to get the received data. But I'm not getting how to do the same in vb2008.
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Feb 6, 2012
I just need to write data to serial port to control a toy car
Moving left, right, forward, back.
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Aug 5, 2010
I am trying to send a control string from VB.NET to a serial port. I am using a pololu trex jr. on the receiving end of the serial port. I have attached a copy of my current code which compiles without errors, but fails to send data. I can tell that it is not sending data because I have a light on the control board connected to the port and it normally blinks when data is received. The program that came with the board drives it perfectly but does not serve the purpose I need it to. I am open to any suggestions as I eventually plan to write a class to contain the control routines.
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Mar 23, 2011
I have created a laser that can be controlled via the serial port. I've written the code to switch it on/off and it works fine. How do i make it strobe? Here's the code to switch it on, to switch it off is similar (don't ask why it is like this...i think it's the transistor from the circuit board that switches the signal):
[Code]...
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May 10, 2011
I'm working on a project where I need to trigger an event when a switch is closed. It is my understanding that it is possible to use the control lines on a serial port and read whether the switch is closed or not. I've found a schematic of how to connect the switches to the pins, but I have not been able to find any example code on how you can read the state of the switches.
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Mar 28, 2006
I have a stand alone VB.Net 2005 application that uses a serial port that generally stays open while the application runs on a Windows XP system. In trying to bullet-proof the UI, I ran into a problem when the USB to Serial Converter normally used to provide the serial port is disconnected while the serial port is open. In trying to handle the resulting error when accessing the port, I find I cannot close the port.
When trying to do so, the error message says something like "unable to close the port. You may not have sufficient permissions." Reconnecting the USB/Serial Converter does not reactivate the port.
[Code]...
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Nov 27, 2010
I'm mohammed from Oman ,I'm visual studio.net programmer How I can Read the Data From Barcode Weight scales By Serial port and TcpIp port
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Jul 25, 2011
I have a Windows form.in windows form have a combo box that give me a list of available port serial with it code (Dim ports As String() =SerialPort.GetPortNames())for example( Com1,Com8,Com15,...).but I want to give me fullname of serial port in device manager for example in dvice manager is these (Comunication Port(COM1) - Printer Port(LPT1) And USB Serial Port(COM8)).how to Get it?
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