Communications :: Input / Output Control Board?
May 30, 2010
We learned How to assemble an input/output control board that would connect to your serial port. We were able to use out statements (back in the old gwbasic) to send output signals to the parallel port to turn on/off different outputs. The board had connections where you could connect lights, relays, etc, and had connections where you could attach switches and sensors.
I have been looking for something simple that I can manipulate in my programs. I already have an ActiveHome X10 interface which includes an activex for receiving and sending x10 signals (home automation, turning lights on/off, etc.). I want something that I can straight out connect relays to, and sensors as well. I don't want something that connects to the serial port since that is already being used up, the parallel port would work fine, or even better usb.
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Jan 27, 2011
I have a problem with something.I have a Arduino board I wan't to communicate with by serialport.
In "Form1", I'll retrieve values from the Arduino board, and I want it to calculate and display data in TextBoxes.How can I do this?[code...]
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Dec 30, 2010
I'm newbie in VB and in my project I need a refresh loop to check an input usb board... everything runs well but I want a 100 ms refresh without button click needed[code]...
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Oct 2, 2010
I need to control this terminal Board and I have absolutely no idea if this is can be done. This board is connected to the PC Via PCI Card. Can we do that using .Net Framework?
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Jun 12, 2011
I am trying to control the security board using the Windows Firewall which connects to my server that was made in VB.Net. My only problem is when I open the Windows Firewall my server crashes. It also displays this error: "Error, win%fir%90y4e does not support this server. upgrade you version of Winsock.". So I upgraded myself to the latest Winsock that there is out there. After doing so I try again and my server still crashes, but this time with a different error. The error this time was the following: "Error, no client is available for win%fir%90y4e. try again later.". What do I do?
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Apr 3, 2011
What i want it to do is 'listen' to the lpt port, when a sensor is broken then display the time. there are two sensor to measure the time of the first and then the second sensor.How do i get VB to listen to the sensors which are on two different inputs of the lpt port and time stamp in micro seconds. I can get it to read the state of the input on mouse click but i need it to display the time in micro seconds when the input changes. i will then use the times from the two sensors to work out the time it took between both sensor changing.
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May 9, 2010
What i want to do it be able to read the input of a pin on the parrallel port. I want to supply a constant voltage to the pin and when that voltage drops i want to jump to another procedure.
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Nov 11, 2008
i need to create an application where input are to be received by the barcode scanner.However, i am not suppose to use the textbox to do so. However i need to use the serial port to do so. Any one know how am i able to do that?
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Jul 11, 2008
I am in the process of designing a computer control program to control a HF communications receiver (radio), and have found a problem with the Serial port. I am using VB Express Edition 2008. This module of the program is supposed to take an input string from another part of the program, format it, break it into 4 bytes, and send it to the radio in hex form via COM port 1. The problem comes in when you try to enter a frequency with an 8 or a 9 in it. The 8 or 9 is usually replaced by 45, ex.-input 9900, receiver tune 4545. The exact same thing happens with 8's, input 8800 and receiver tune 4545. All other numbers other than 8 or 9 work fine. The strange part of it is that sometimes the 8's and 9's work, and work correctly. For instance, 900, 1900, 2900, 3900, 4900, 5900, 6900, and 7900 all work correctly. This led me to believe that is may only be when the 8 or 9 is in the first position, but that is not the case, it also shows up in other positions as well. All other frequencies that do not have 8 or 9 in them also work. I ran into this same problem with VB Express 2005, and worked on it for weeks before giving up and going back to VB6.0. This same module (with exception of the port open command) runs flawlessly under VB6. I have even tried importing the MSCOMM control from VB6, but it gives the same results. In de-bugging mode, all of the inputs, decimal and hex seem to be correct, so the problem must come in after you click the command button, but before it leaves the COM port.
[Code]...
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Jun 2, 2009
I created a simple calculator. I just graduated with my Bachelors in Software engineerin in March of 2009. I am tryig to get a better understanding of VB.Net. I created a simple practice calculator and would like to know what code needs to be added in the code to clear the output when the user changes the input without adding a clear button as I know how to clear the input and output using a clear button, y working code is pasted below.
[code]
Public Class Calculator 'Form click event handler
Private Sub Add_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
Download file asynchronous using sockets
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Oct 19, 2010
In my programming class, we have been set a task in which a user inputs 8 numbers, and those 8 numbers will be split into groups of 4 (therefore having 4 lots of two digit numbers). These 2 digit numbers will then translate to a specific time, day, place and city.
For example, this table below is what we have been given for city. (there are separate tables for time, day, place with different 2 digit numbers)
(Excuse the formatting)
City Code
London 11
Paris 37
[Code]...
For example, if a use inputs 11995467 I would want that to output London (being the number 11), [a PLACE = 99], [a DAY = 54], [a TIME= 67]
Bearing in mind I am a newbie, and my knowledge of VB is minimal. How would I go about doing this. It's suggested we use MOD and integer division, but I don't see how it can work.
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Jul 28, 2009
I'm trying to do a calculation where-in the output is different depending on what the input is. [code] I have these repeated using >=50 >=60 etc. but when I go to run the program I get this: [code] basically I need to know how to create a cut off point for the grading system. <= doesnt seem to work.
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Oct 30, 2011
Applications in the .NET Framework can use the System.Console class to read characters from
and write characters to the console. Data from the console is read from the standard input stream,data to the console is written to the standard output stream, and error data to the console iswritten to the standard error output stream. These streams are automatically associated withthe console when the application starts and are presented as the In, Out, and Error properties, respectively.I am working with redirects and I am solving small problems one at a time. So far so good, but I lost track of the big picture here. Can someone please clarify something for me.
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Oct 7, 2010
I have a stored procedure with two input and one output parameters. I need to execute the stored procedure from VB 2008 code passing it two parameters and returning the output parameter. How might I go about doing this? I don't have how to do this. Newbie here.
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Jul 6, 2011
find a way to check if a file exist before opening it or creating it.I know how to open a file for output or input or even append which is what is going to do assuming it exist already.
'all this is inside a button which will open the file upon pressed
'to populate a
'combo box drop down list[code]....
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Nov 30, 2011
Normal
0
false
[Code]....
This question has been most likely been asked a number of times, but really hitting a brick wall regarding this.
The issue is that at the moment, I have to create a database using text files on VB.
So far I have managed to get the code working to add new customer and browse added records, but stuck on how to output/input back and fore to a text file, to store information, and after this input/output the text file to a DB ( Not worried about this at the moment)
Public Class Customer
Dim CmrColl As New Collection 'Create the new collection. Think of this as an array of objects.
Dim itemCount As Integer = 0 'A variable to help us scroll through the objects later.
[Code].....
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Jan 17, 2010
I have an input and an output, but i would like to know what how to calculate/find the string encryption in between.
Input: 22ac24c481690dd5d90973c6697624ec
String: ??? Unknown
Output: cc28641637656a42e092b61d3e67af0d
[URL]
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Sep 11, 2009
I have 2 VB programs that I would like to communicate with each other, but I want them to be separate EXEs. Anyway, the easiest way I figured would be for me to call the one program from the other and then return a result. How do I get this result into another program?
Here is how I want it to work:
1. Start System Information Program (easy)
2. Call a video test program, and send a couple arguments (see below)
3. Receive arguments from the video test (I do not know how to do this, I do not know how to send from the video test or receive from the system information)
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Dec 30, 2011
need an example of a console application that would allow you to input data to and retrieve data from a text file on disk.
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Nov 27, 2009
Every time I try and redirect input and output of command prompt I have a problem. The debugger itself crashes! Something must really be wrong. What is a good way to launch CMD and send commands to it, receive output.
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Feb 1, 2010
I am using vb2008.net express, I test vs2005term it work, can any tell me what is the input variable and output variable of this terminal? how to catch the input and output variable to a textbox1 for sending and a textbox2 for receiving when I press send button? is that possible? I attach the example of my question this is a a good source, but it is not relate to my problem: [url]...
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Dec 31, 2009
so here is my scenario. I have two input files... both are plain text files. File1 has customer name, customer address and invoice number. File2 has customer name, customer address, invoice number AND a keyline. File1 will only contain some of the records in File2, and it will change daily. I need to be able to compare File1 against File2 and output one file (preferably an Excel spreadsheet) with the info from File1 and the keyline from File2, that matches the duplicated info. I know the basics to get it to work, but I'm not sure what would be the easiest way of doing this... File2 can have up to 100,000 records per day. I'd only need to run it once a day though.
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Sep 19, 2009
I've to make a program that reads an arithmetical sentence from a textbox, e.g 12.3*34+4*5-3 and then on another textbox identify and display what is the content of the first textbox, for example taking the last ex:
If I have this input:
12.3*34+4*5-3
The output should look like this:
<number>12.3
<operator> *
<number> 34
<operator> +
[code].....
This program should only read this operators like (+,-,*,/).I'm have in mind 2 ways of doing it, one with regex and the other taking the first sentence, put it on an array, then trim it, and somehow get the values of the array and identify if it is a number or a decimal number and if it's an operator and then display it.
The difficult part or the part that i can't conceptualize is how to implement it with regex (it should be easier with a regex format than storing it on a array).I write a bit of code, I used an array to store and then to print the numbers and I used the split function to separate the math operator, but I dunno how to print the operators and the tags.
vb
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim Sentencia As String = TextBox1.Text Dim i As Integer Dim arryTextBox() As String TextBox2.Clear() arryTextBox = Sentencia.Split("+", "-", "*", "/") For i = 0 To UBound(arryTextBox) Dim Array As String = arryTextBox(i)
[code].....
Btw, I also have the code to validate the input on the textbox ::wink::
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Sep 4, 2009
I am writing a program which was pretty easier until I got to a certain part. I need to write a code that will let me input 2 alphabets and they will output in alphabetical order
Ex:
Please Enter alphabet 1: b
Please Enter alphabet 2: a
[code]....
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May 16, 2011
I work in an engineering design house and programming is not my actual profession. And I am relatively new to VB .net (previous i had worked in vb 6)
I am working on an in house application. I am coding a simple application in vb .net. This applications takes a few inputs from user and calculates a result. Now I want to implement a simple functionality that user should be able to save the input and results just like most of the windows programs can in a new file format. And user should be able to open the save file when desired.
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May 16, 2011
I've been trolling for a long time now and have decided to register as I finally have some time to start jumping into VB. The last time I coded VB, the current version was VB 4. I've been out of programming for a good while now and considered myself a beginner (tutorial example coder haha).
My question is: Where is a good place to start learning VB.NET?
I know it's an often asked and answered question - but let me give you a bit more information so more specialized replies might be given.
I'm in INFOSEC/COMSEC and would like to (eventually) develop a program that contains a DB of information that is read by the application and saves input information into a DB (encrypted) as well. The program will be a 800-53 C&A control assessment program; used for tracking system compliance for federal information systems. I would like to be able to develop such a tool to make my life easier at work instead of using Excel spreadsheets to track everything.
I would like to learn:
- Input / Output methods and validation (for secure coding)
- Read/Write DB Encryption (RSA or other 128-bit) for user input information
- Ability to generate PDF reports from the primary keys and data sets from the above DB
My goal is to create a program that allows a user to install the program, setup a 'master' account that a serial/key has been generated for - that master account is then allowed to create new projects (progress saved in DB). A project asks the user certain questions pertaining to information systems and takes the input and saves it into the DB (encrypted). When the assessment is completed, I would like the program to be able to generate a PDF report from the DB (from a layout template I created).
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Jul 13, 2008
How do I register the control?
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Feb 17, 2009
I am using VB2008 SerialPort to communicate with a device. My problem is, using RTS handshake I am missing the first 50 or 60 chars, after that everything is intact. I tried to change the buffer size - Has no effect, used standard, bigger, smaller and no change.
The device timing says when it sends CTS signal, it will start listening 100ms after that. I have no clue how to delay the write to test this. Should I first write to the buffer then write to the port after a a 100ms timer event?
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May 16, 2010
I am using VB10 Pro. I am trying to add an MSComm to a project. I have tried to follow this example: [URL] which utilizes VB6 but cannot. Instead I right clicked the mailbox, selected Choose Items, but could not find Microsoft Comm Control 6.0 in any of the tabs. After doing a search I found another example.
From that one you go Project | Add Reference | COM.
But again Microsoft Comm Control 6.0 does not show up in the list. Where is MSCOMM? Doing some further research, I do not have mscomm32.ocx in my C:WindowsSystem directory.
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Dec 22, 2008
can i in some way change the power that the usb sends to a usb device?i want to connect a computer fan to the usb and control the speed is this posible??
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