VS 2010 - Sequence Of Commands To RS232 - How To Sure Command Is Received
Dec 20, 2011
I write in VB2010, the software should work with the external hardware via RS232, the thing is when I send a command to the external hardware I have to wait for a reply from the device that command was received, just after I got the answer I want to continue send another command, I have a long sequence of commands i'm supposed to send, but I need to know for sure that the commands were received before I go on to the next command. I did the following code, but I think the code is not effective, because sometimes I do not get an answer and then the whole sequence commands destroyed. Maybe you can help me optimize the code? [Code]
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Jul 26, 2010
I have downloaded the vb script and it works as it should, its a program where you have some buttons so that you could trigger the relays.But i need several small scripts, one for each relay on / off so that i can call them from a .bat file with argument.i have a .bat named relaycard and in thet i have created argument like
relay1on
relay1off
relay2on
relay2off
and so on.
The small program relay1on should just do the jobb and then close itself.Maybe its a little bit clearer now.On the link that i posted there is a manual and even links to the vb program,
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May 5, 2011
How do I send XML commands in vb to get data received over a serial Port?
I know the commands I'm just not sure how to send them.
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May 11, 2010
I attempting to download 6 files from my FTP site to a local server using VB 2008.After 1 or 2 files are downloaded I am geeting an error Bad sequence of commands.It appears the ftp connection is not closing then re-opening.[code]Then I change the file name. After the 2nd or 3rd file, I get the error message.How would I close the connection and reopen it without having to close the program?
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Jan 17, 2009
I am doing wrong? I am using VB2008/VB.NET to send a command (set to 4 volts) to a Tenma DC Power Supply over an RS232 cable. I don't have documentation from Tenma that lists the commands that the instrument understands, I got "VOLT040" from a program in an older version of VB that someone else wrote for this instrument. The code is below:
[Code]...
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Oct 18, 2010
I have developed a microprocessor based devise. It can communicate with laptop through RS232 as a VB application. Now most of laptops have USB port only. So I want to use USB replacing RS232 port on laptop side but not change anything on the device side. Can I do this using a USB-RS232 converter? How to change the VB software?
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Jan 29, 2006
I'm getting a strange error in my VB FTP program. It works fine when I download a file from an FTP server, but the second time that I download the same file i get "503 Bad Sequence of Commands".If I download one file, download 3 other files, and then try to download the first file again, I get the error. If I close the program and open it again, the error is gone when I try to download the file.Is there some command that I need to send the server to unlock the file or something?
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Apr 29, 2010
Sample: EscreveByte = Val(AscW(Letra)) sw.WriteByte(EscreveByte)
[Code]...
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Apr 21, 2012
The question is self-explanatory. It would be great if the code was one line long (something to do with "Process.Start("...")"?). I researched the web but only found old examples and such ones that do not work (at least for me). I want to use this in my class library, to run Git commands
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Sep 20, 2009
I know of the Shell method to run files, but how can I execute normal command prompt commands like nslookup, and capture the output as a string?
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Jun 24, 2011
In my application I have only one button . That button will open CMD then it will send a command into cmd , now after that command it requires an "enter key" to continue the process .I tried the shell command in order to access the command but then I couldn't press enter in cmd using my application
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Dec 13, 2011
I am trying to send commands to Command prompt.The following code should open the text file I specified.However it opens several instances of the cmd window and also several copies of the text file. Sometimes the text file is not opened and if the file path is long, part of the file path gets inserted into my text file.[code]
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Apr 28, 2011
I am using Visual Studio 2010, VB to compile my program. My program include having to open a command prompt and writing a command to it.and display the output/errors in a textbox. But i can't seems to make it display it in a textbox and it opens ALOT of command prompts windows.
Private Sub btnStart_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnStart.Click
Try
Dim P As New Process[code].....
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Sep 1, 2009
Using keyboard command Instead of using buttons to put commands How?
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May 25, 2010
I'm trying to create a program that does the following:Executes the following command line string (wmic /node:computername bios get serialnumber)Prompts user for the "node" entry Displays the resulting serial number in a dialog box I'm a bit of a noob at this (I haven't coded anything in VB since early 2000s) so I'm at a bit of a loss where to start. I plan on including some functions to submit the node entry and the resulting serial number to a database in the future for archiving as well.
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Jan 26, 2009
I am using VB2008 Express and am curious how to send a command via RS232 communications. The string that I need to send is 02h PON 03h. The start and end bits are 02h and 03h.
How can I convert 02h and 03h to its ascii form. In hyperterminal, I use the sequence {(hold)ALT 0 0 2} on the number pad to send the start bit.
I am using this code currently without the start and end bits
Code:
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Dec 5, 2011
Possible Duplicate: Creating a Serial Port in code in VB.net
I wanna connect RS232 to vb in order to set an input for motor such as the steps and motion. I'm really new with VB. I'm using VB2010 express. Can you help me with the coding?
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Feb 10, 2012
Possible Duplicate: Creating a Serial Port in code in VB.netye. I wanna connect RS232 to vb in order to set an input for motor such as the steps and motion.
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Feb 28, 2011
Im coding a program to grab 3 names and 3 times and display the persons name with the lowest time in the corresponding text box. The program works but only if my values fall within the rules. Im trying to make it so that it displays the correct winner.Quote:
Private Sub btnCalc_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalc.Click
'Calculate who came in first, second and third place
[code].....
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Jan 12, 2012
i have a file with a serial number in it and i need to check if it is in sequence or not and then print a report stating no errors or if there is errors what line they are on.
[Code]...
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Feb 29, 2012
I'm trying to animate a game piece by using a picture box where the x,y location is changed as the image changes (cycles through a walk animation sequence). This all works fine, however it's too damn quick. I've tried slowing it down using a simple:
for z=1 to 1000000: next
While this works-ish there must be an easier way to slow down code....is there? On a related matter: Why does picturebox animation look so crap compared to combining images in the paint screen section? My picturebox seems to flicker every few frames.
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Apr 13, 2010
Some people have argued that the C# 4.0 feature introduced with the dynamic keyword is the same as the "everything is an Object" feature of VB. However, any call on a dynamic variable will be translated into a delegate once and from then on, the delegate will be called. In VB, when using Object, no caching is applied and each call on a non-typed method involves a whole lot of under-the-hood reflection, sometimes totaling a whopping 400-fold performance penalty.
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Dec 24, 2010
I have a text in richtextbox1, i want to extract each 3 char of the string and so on, like:
[Code]....
How can i do it ? Code can be in C# 2010 i will translate to vb.net 2010
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Mar 1, 2012
For a school project I need to create an application one element of that it puts 14 names into a random order, I figured the best way to do this was with an array and a for/next loop (it cannot repeat the names) each name would be declared as a string with the name of the variable being a number between 1,14. Then there would be a text box relating to each index of the array, I am sure you get what I mean. However, my for/next loop seems to be getting stuck and causing the application to halt and I cannot seem to work out why.
Here is my code.
Public Class Form1
Dim iNumber As Integer
Dim arrNumber(0 To 13) As Integer
Public Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
[Code] .....
I have yet to write in the section which converts the random numbers into the names, as I discovered this error whilst debugging the for/next loop.
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Mar 15, 2012
Visual Basic 2008/2010 - How do I automatically click buttons in a sequence?I have about 15 buttons that automatically goto a website, then it clicks on certain links and does save as page. They are working beautifully, now i have to automate this process. already have a code in place to wait for the website to finish with each button so i am not sure if i can still use a timer to complete this process?
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Apr 18, 2012
I'm trying to write a function which obtains the sequence_number by counting the records in a table that fit a particular criteria and if the result is 0 or nothing sets a variable to 1 but if the result is 1 for instance, the variable will be set to 1 + 1.
This is the code i'm using but i'm not getting the correct result when results are actually returned. For instance, if the result of count is 1, i want "seq" to equal 1 and total (which represents the sequence # assigned to the next record which is entered with the same plan and date) would therefore be 2 which is the result of seq + 1 (i.e. 1 + 1)
[Code]...
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Apr 25, 2012
how to convert received string to double.
I'm receiving string as 420.8 280.9 140.2 like this from serial port.. and transferred it into textbox..
I'm using following code to split string and to convert to double
Dim ReceivedText As String
ReceivedText = txtReceived.Text
Dim str_RY_1U, str_RY_1V, str_RY_1W As String
[Code]...
For calculating percentage RY_R is calculating fine.. But when it comes to RY_Y it showing error "string not in a correct format..."
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Oct 22, 2010
I have written a simple Server application that transmits an XML string to all connected clients when the user updates/alters a datagridview. When I connect to this server with telnet I can see the correctly formed xml string.
I have also written a client application, which on reception of the Xml string, displays it in a datagridview. But When I look at the xml string it is either missing parts of in the wrong sequence.
[Code]...
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Dec 30, 2011
i have a simple photo viewer application where i want the user to click a "load sequence" button and then i want something like a folderbroswerdialog to appear then the user can pick a folder with images in it then the images get loaded into the picturebox and the user can click a "forward" button to go to the next image in the sequence and a "backward" button to go to the previous image in the sequence, it's kinda like windows 7 photo viewer.
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Feb 3, 2011
I Am working on a sequence checker that will check a list of numbers to make sure they are sequencial? however we now have a new job for a 5 in 1 layout so the serial number i split up over 5 collums and mixed with other data. i can import the data into a data table split by ","'s ?
[Code]....
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