I am currently doing a program to control some device via usb port but i don't know how to interface the usb port using vb.net. anybody can help me with this problem as which namespace I should use?
View 10 RepliesIm having problem with the Serial Port. When i run my program, "Access to the port 'COM1' is denied". What does that mean? Im not sure whats happening because theres no error in my code. Someone suggest me to use 'COM2'. Which is also the same result. I have a microcontroller, programmed and run it. And i need to capture the data onto my vb, which is on a multiline textbox. How to i do that?Just to double check my code?
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I want to find the coordinates of a speeding vehicle by accessing the position of the vehicle through GPS(from a server system). how to access GPS port and retreive the data.
View 4 RepliesHow do i access a port in Visual Basic?
View 3 RepliesI am currently doing a program to control some device via usb port but i don't know how to interface the usb port using vb.net. i want to send data on a device to make it act like parallel port..
View 10 Replieshave gps constantly sending data but can read it from the com port
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m really not sure in here because this code is for vb .net 2003.. are they the same?
I have used a third party component to download a file from my FTP server. One user has advised that their antivirus software (ESET) is blocking it. How can I determine which port it's using so that they can exempt it?
View 2 Repliesi want to access com port of my remote pc. this pc is connected through LAN.how can i access com port of remote pc?
View 1 RepliesI have a serious dilemma! I have a com port COM3 and i USB device attached to it ! now when i use Hyper terminal and i can read and write to it using AT commands. for example when i type in "ATI" in hyper terminal it will return me a bunch of data how can i so the same using a VB program ? is there a way to emulate the functionality of Hyperterminal? I tried using System.IO.Ports and a SerialPort class but no success.
View 6 RepliesI have very limited knowledge of any programming and am desperately trying to learn. I am attempting to use Visual Basic to create a simple program to operate our church's projector from the computer. I am able to control the projector using hyperterminal and accessing the serial port. I am wondering how I would code a button to send the correct signal to the correct port? I have a simple setup w/ my church logo in background with three buttons. There is an On, Off and Freeze button. I am simply needing to know how to program the buttons to access the serial ports. I hope I am being clear.
View 2 RepliesIn my project I'm trying to send data to Serial port. I have added the serial port control to the form. Now if I try to send data to serial port using Serialport1.write method in a button click event, I'm able to send the data successfully to the serial port. Otherwise if I try to send the data using the same "Write" method from another thread other than the one in which the serial port component was created, I'm getting an exception saying serial port busy.
View 1 RepliesI have conquered the problem of the database however what i need is the serial port data sent to a database and outputted on screen however i keep getting cross thread errors ..
Imports System.Data.OleDb
Imports System
Imports System.ComponentModel
Imports System.Threading
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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
View 7 RepliesI 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?
View 2 RepliesI would like to detect the Address and Port number of the Parallel Port in computer.
View 4 RepliesIf I uninstall the COM1 and reboot, it works. If I shut down (power off) and restart, I get the message below. If I uninstall then click on Scan for Hardware Changes,The given port name does not start with COM/com or does not resolve to a valid serial port. Parameter name:portName
View 8 RepliesI got an app, which receives data via a R232 port, convert it to a string and on the other side I got a database, where the strings are saved. How can I find a way to compare the string with all strings in one database column and get back the another stringform the same row in this database. I never programmed a database
View 1 RepliesI am trying to get my 4 port USB relay board to work in VB.net using the COM PORT. I found some code from a poster who has the 16 port USB relay version. When trying his code i can only get it to turn on relays 1-3 all at the same time. The product can be found here: USB 4 port relay
"01+//" - Relay 1 is switched ON
"01-//" - Relay 1 is switched OFF
"02+//" - Relay 2 is switched ON
"02-//" - Relay 2 is switched OFF
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So i am confused as to how to separate each relay out with that code above and just be able to turn on any number 1-4 relay on or off independently from each other!
I am trying to get my 4 port USB relay board to work in VB.net using the COM PORT. I found some code from a poster who has the 16 port USB relay version. When trying his code i can only get it to turn on relays 1-3 all at the same time. The product can be found here: USB 4 port relay I was following what the guy in the post was doing to turn his on:
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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
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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
Do someone know if there is a\\ USB control for the USB port communication? like the SerialPort control for the COM port.
View 2 RepliesI have an application that has an Ms Access 2007 DataBase which runns great if access is installed. Is there any code that I can use in vb that I would be able to run access with out installing it.
View 5 RepliesI have a program in VB.NET 2005. At some point I have to open an Access2003-Application for getting data in it. I do that by pretending my program is a human user and let it do all the work in Access as a human user would do. Filling Fields, pressing buttons etc. I use the Primary Interop Assemblies for that. So far so good. That code is in use for over half a year now. In the last week I got Office 2007 installed on my machine. Of course I tested the installed version of my program if everthing still works. Every test was succesfull. But if I do the same tests in Visual Studio it always crashes.
All I get is this Errormessage: {"Das COM-Objekt des Typs "Microsoft.Office.Interop.Access.FormClass" kann nicht in den Schnittstellentyp "Microsoft.Office.Interop.Access._Form3" umgewandelt werden. Dieser Vorgang konnte nicht durchgefhrt werden, da der QueryInterface-Aufruf an die COM-Komponente fr die Schnittstelle mit der IID "{66B22FB4-F70E-4F03-A00A-F76E9ADBBF10}" aufgrund des folgenden Fehlers nicht durchgefhrt werden konnte: Schnittstelle nicht untersttzt (Ausnahme von HRESULT: 0x80004002 (E_NOINTERFACE))."}
For all who can't read german:
"Microsoft.Office.Interop.Access.FormClass" can't be converted in to "Microsoft.Office.Interop.Access._Form3" ... Interface is not supported.
Code I use:
Dim access As Microsoft.Office.Interop.Access.Application = Nothing
.
.
.
access = New Microsoft.Office.Interop.Access.Application()
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The Error occurs when I try to access any property of "access.Forms("frmTest")"
I am new to this forum as will as to VB. I am using VB6. I want to access the USB port in order to read the data at the USB port comming from my Data acquisition card.Or as a matter of fact can I also access the data from my mouse, because it also transmits the signal when ever the mouse is moving.
View 3 RepliesIt is possible to disconnect an IP in a port? I have a MMORPG server, and I need kick bad players using IP of this player.
View 2 RepliesI need to transfer data between several computers in a network using my app. I thought of using TCP ports. how to open and use them? I only want to make a file transfer and chat app that works offline.
View 3 RepliesHow can one close the usb port (shut off power (electric current)) ?
View 8 RepliesI am trying to send and receive packets over the LAN (i.e. NIC port) using VB.NET. I found some code that uses Socket wrench, but problem with such solutions is that users will need to install extra drivers and all which I do not want. I am looking to use drivers native to the .NET environment to send and receive packets through the LAN port. My windows forms application is in VB.NETneil
View 1 Replies