I have am using an XBee ZigBee wireless module to communicate with a project of mine. I currently have it set up to the point where I can open a hyperterminal session to COM 4 (which is the usb com port), and recieve the data that is being sent via the microcontroller on the other side of the wireless link.
I would like to make an app that takes the data and puts it in to a more user-readable format. (Via VB 2005) So far all I have come up with is some problems. It doesn't seem like I can use the built in serial port tool to access a "virtual" com port. From the following link:Quote:
Note You cannot use the Microsoft .NET Framework classes to directly access other types of ports, such as parallel ports or USB ports.[URL]..Do I have to use a "COM port redirector" to make it seem like a real COM port? Or is there some easy way that I am not thinking of?
I have been doing some research into accessing devices on a USB port and it's kind of helped, but not really. From what I understand, I can use the IO.Port namespace to access a device on a USB port (usually). Let me know if this is incorrect.
First, I made a simple program that looped through the ports available. I get COM1 and COM3, but I have 4 USB ports. Where are the others?
My Dim comm As New List(Of IO.Ports.SerialPort) 'list of comm ports For Each PNstr As String In IO.Ports.SerialPort.GetPortNames() 'get a list of Com Port Names
I'm debugging a VB app where I'm using a comm port attached to a bluetooth radio paired to another bluetooth radio in order to communicate with a remote barcode scanner. The pair of bluetoooth devices basically work as a serial cable replacement. Sometimes it works fine, but after a while I get an UnauthorizedAccessException message which breaks the program (see attached jpeg).
I only get this when I use the radios and not when I use a direct cable. I wonder if it has something to do with other bluetooth devices nearby trying to communicate with mine. I've used the .NET Framework 2.0 Confuration tool to adjust the zone security to give full trust to MyComputer, so I don't think it has to do with security, but I'm really going beyond my area of expertise here. I don't know what's going on.
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.
I'm having some issues with a game I've been writing for several years. It's an on/off project and recently I purchased a new computer and formatted my old computer so all of my installations of windows and visual basic 2005 (express edition) are fresh. I'm getting the following error:
Is it possible to add, edit, view and delete records using a file only (instead of a database) and .Net 2005 (VB.Net/C#)? The concept is that a file that'll work more-or-less like a database. One can add, edit, view, delete and query data to and from the file. The file, either cannot be opened directly or data inside the file should be in some encrypted form so that even if the file is opened no one can comprehend it. Data inside the file can only be manipulated by a front end application i.e. .Net 2005.
I have 10 threads each using the same sub to do work. This sub is calling a function to save the results. How are the threads accessing the sub? Is each one getting a fresh copy of the sub to do its thing or are they using the same piece of code and need to wait for each other to finish processing? I don't get any hits when searching for such a specific scenario. I am wondering because it is about using sockets (usually lightweight stuff) to retrieve a resource and the cpu is working at 100% all the time. Still it is very fast, 900 internet queries finish in about 3 minutes.
I am trying to programatically use my SQLdatasource in my code behind so that I can select a certain field from a table based on the selectedindexchange event of a listbox control on my form. I have one datasource already set to the listbox control but i want a seperate datasource to select a field based on the value of the listbox. I declared a new datasource sqlDataSource2, set the connectionstring to the same database/table and i have the following line set for the select statement
I have an issue with am access database source located on a remote computer.I tried using ADODB to access it, it works, but when I change( update insert or delete) the database on the remote computer, the changes is not reflected in my application
I have a small databse program. Form1 uses the Private Sub OpenToolstripmenu to Openfiledialog box and creates a connection and adapters. I need a second form that will access the same connections and adpaters what is the best /correct way to do this? Also other sub functions on form1
My problem is that i have a usb-to-serial device which creates a virtual serial port ( Com 4 for example )on the computer i need to connect to it and get the data stored on it I already have worked out how to use the System.io.ports to connect to the port ( baud rate, stop bits, parity ,ect) and it connects to the usb fine. But once the connection is open i don't know how to retrieve the data. Everything i have tried relies on events. But as the usb does not send data i don't know how to access the serials memory.
"Getting a list of system tray icons/programs has been a thorn in my side for the past year can get the list as long as explorer is running, but the second explorer is closed, the list will not populate. I'm frustrated beyond belief that I can't find the proper API calls to get the information. If anyone knows how to do this, PLEASE share it here!! I know it is possible, because other shells do it. -Ray"
I have to make some automatization on a web server, I use Visual Studio 2005 Visual Basic Windows Console Application. I want to make a load/performance test of the web server, so I open several Internet Explorer instances, and I login the application, that is not a problem. But after that I have a mess on the page and I cannot make any more automatization...The composition of the page after the login is like this: I have the default form, another form and a multiple data window(mdw) controller, which dinamically can switches the forms on this part.
The problem is that I don't know how to access the controls of this mdw forms. I couldn't find much about this mdw controller and I am not an expert.
My code is here:
Imports System Imports System.Diagnostics Imports System.Web.Ui.Webcontrols
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?
Actually I have a Weigh Bridge (A Large Scale weight mechanism which weighs in Tons) , for which we use an ELECTRONIC WEIGHT INDICATOR which display the weight on its own digital screen while it has an option to connect with a pc via Serial Port,,I just want is to have its weight (Digits) in a text box of my VB.Net Program,Here I want to mention that I know technical settings of my weight machine such as
I write program for Windows CE that should work with Serial ports. I use object System.IO.Ports.SerialPort. Everything works well but when I close program and open it again, I receive error: Port is in use! At the end I write:
port.close() port.dispose()
And If I add this:System.GC.collect() than everything begins to work But problem is that computer gets stuck when garbage collector is called for each port. If I tried to use collector somewhere else, it doesnt "collect" ports and they look like used if program starts again.
I have a problem with my program. i can't read any data from serial port. when i click on open the rs232 has to read but it doesn't.i use the program in a pdf(ADAM-4000_Ed-15).[code]
My app runs perfectly with debug but I'm having a couple of little problems with the actual build on another machine.'m getting a "safe handle has been closed" (most of the time, but not all the time) when I button click out of a certain area.The problem, no doubt, is related to the serial port and I think I can solve it but I do want to ask something very basic....I have several points in the code where I'm doing a serialport.open and serialport.close....and clearing some registers etc.....like I say, in debug all is well.
I am having trouble running a VB.NET 2.0 Serial Port application in Windows 7. I developed it in Windows XP, it ran fine in Windows 2000 and now when the company upgraded the machines to Windows 7, the application does not kick off. All platforms were/are 32-bit. I did some research online, but have not found anything relevant to resolve my issue. Does anyone know what the issue might be and the possible solution to it?
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?
If 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
