IDE :: Can't Display Text During Serial Transmission
Feb 10, 2010
I am using this routine to send one line of text to a serial port.The text file is made of many lines. This code works except for TextBox1 line.I like to print * signs for every line sent to indicate the system is working.[code]The routine waits and pumps out all of the * signs after the transmission is completed.
1- How can I place one * per line of transmission in TextBox1?
2- Is there an easy way to add 15milisec of delay at end of each line?
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Mar 2, 2010
I want to the code for serial data transmission in vb.net. and pls give full information abt how to use serial port in VB.net
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Dec 19, 2011
I'm trying to read a string(what's going on) from my Arduino and display it in either a label or text box. but its not wanting to display the characters, or string i want it to. So I could really Here's the code I have right now:
Imports System.IO
Imports System.IO.Ports
Imports System.Threading
[code].....
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May 12, 2010
I've wrote a program that send and receives data via a serial port to a microcontroller. At present when I click (from a menu strip) a certain option I send data such as
Private Sub MsToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MsToolStripMenuItem.Click
SerialPort1.Write(1)
End Sub
What I am wanting to do is instead of sending the data just once when I click this option, I want it to repeatedly send it until I select another option where the same occurs again and so on.Is there a function that acts like a while (1) loop that can do this?
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Jun 8, 2009
I have simple udp client and server using UdpClient class in .net frame work 2.0. My Ip address is 192.168.5.20
and client ip address is 192.168.1.25 and we client pc and mine are on same network. When i tried to send udp packet from client to server exception occurs: "A socket operation was attempted to an unreachale host 192.168.5.20:10080..." But when i change my(server) IP address to "192.168.1.20" communication is fine.How i can solve this problem or,how i can send packets other than my domains ip addresses.
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Jun 29, 2010
I have a standard TCP socket established over WIFI with a peer.During the connection I transfer packets of data both ways.At one point in my program on the PC, the peer receives an errant read event with zero bytes and a 'close connection' command although my PC program has not issued any writes on the stream. It occurs at a similar (although not the same) point in my PC code, usually when I am making a collection, processing data and adding things to the collection. I have checked, and there is definitely no writes occurring from the PC end during this period.There is no problem with the WIFI and anyway, it always happens during the same piece of PC code, therefore it is generated on the PC by my code. I can put a checkpoint in and wait and then run the code, and then the peer will receive the errant transmission at some point during that code execution.
1. Is this normal for socket programming or is this likely to be a bug or an error?
2. Is there anything that can trigger a socket transmission without explicityly coding it?
3. Is there a way of stopping any transmission across the socket whilst not using it? i.e. a temporary hold
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Nov 6, 2011
I want a text box in my application that will display the data currently coming from the serial port,So if i will send ascii "hello" from another computer on my program it will diaplay "hello".
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Dec 10, 2009
I am new to VB2008 Express, I have been trying to get data from the Serial port, i have tried for days to get it working. I have read lots of articles but most seem to be for Console applications and I am using an Application. All I am trying to do is create a form with a Textbox and this should display the data received from the serial port.
The data i am trying to receive is "ABC" on Com1 Can anyone either send me a project, as I am sure its something to do with how i am configuring it, or if thats not possible, show me in code?
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Jul 8, 2009
I'm working on a project involving reading RFID tags, I've written the code and it reads the tags ok by using the recieved data handler and displaying the result in a listbox, the only problem is that the data displayed has a couple of unreadable characters at the start (I'm using ReadLine() command.)If I read the buffer byte by byte the data is all readable.How can I read and display the whole 16 Bytes in one go??
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Dec 31, 2010
I'm working on a project that incorporates an Arduino Duemilanove board and a program that a wrote in VB 2008. Basically, when the Arduino receives a symbol from COM3, it sets a Pin on the board, high or low. I'm using two Pins, one is going to be for a laser, the other a relay. The relay is going to close a circuit, and act as the button on the Nerf Vulcan. That's right, I'm creating a Nerf sentry gun.It's going to be fully controlled from my computer. I have all of the code done for the servo, and all of that, both on the Arduino and in VB.
The Arduino sends the angle of the Servo that will control the right and left movement of the gun through COM3, every time it changes. I want my program to display that position in a textbox, as my program needs that value in order to properly function. Basically, I need the code to read from the serial port, and display what it receives in a textbox, textbox3.
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Apr 28, 2012
I ve been reading forums all over the net for 2 weeks and I failed to find solution for my problem. here is my problem;
I am able to receive data from serial port in to richtextbox and its working fine .. what i wanna do is dislay data in textbox by spliting string[code]...
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Jun 21, 2009
[code]...
I have a quick question regarding the serial port and timer tick event. Basically i have a micro processor connected to the PC via the serial port. With a baurd rate of 38400 set.When the PC sends the micro ":K + VBCRLF" the micro response with a string of information (ASCII encoded) and delimited with a "," and at the end of the transmission a cartridge return line feed is added.Example of sent string:
"12,1134,123,545,76,6868,34,232,1,2,3,6,7,8" These numbers are then split using the VB mystring.split(",") function into an array of strings, then the numbers are converted using ctype. After which my UI is then updated.I have Witten the code in a tick timer event using a timer count of 300ms. Although the program runs and the UI is updated i end it with lots of exception errors. I think allot of this is down to the serial port either timing out or not reading complete string.Or possibly the timer has not executed all the code before another tick event happens Even after adding a few try catch statements i am still having problems. Can anybody suggest a better way of doing it?I was thinking of using a do while loop and at the end a sleep function instead of the timer tick event.I need the speed as i am trying to read and display live data.
[code]...
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Oct 30, 2011
Like the title says, i have a code written in vb.net that receives data from a PIC microcontroller via rs232, but i need a way to know when te trasmission ends. I have put the word "END" in the microcontroller code so that after he sends all the data , will send the word "END" ..so i need to implement this in my vb.net code and when "END" is received to display "finish" popup message.
Imports System
Imports System.ComponentModel
Imports System.Threading[code].......
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Jun 8, 2011
My last post isn't even solved yet but already i'm on a new job, of which i'm not very proud. This time i need to convert the hex codes i put in a textbox as a string like this:
[Code]...
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Feb 1, 2012
im reading a serial com port (Ardunio FTDI presented as a com anyway). It works fine for a few seconds then randomly I get random text, Ive tried a few different settings but there dosnt seam to be a specific trigger for the randomness.Ive read a few notes about a known buffer overflow issue and checked it in terminal where it's fine. This is my first return to VB in 10? years so im more then alittle rusty but this has me stumped,
Private Sub Timer2_Tick(sender As System.Object, e As System.EventArgs)
Handles Timer2.Tick
Dim LineOfText As String[code].....
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Oct 13, 2009
i cannot read data from my serial port..i am using HYPERTERMINAL on my other computer(computer 2)..i can send data from my computer(computer 1) and it showed on computer 2..but when i type things into my HYPERTERMINAL in computer 2, the Visual Basic program cannot read it??this is my code:
[Code]...
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Jan 4, 2010
i want to update the serialnumber by using a text box,,,,suppose i am updating the serial number as 3,,,,it was updated,but if i wants to update the serial number as 4 ,that is already in the database it is also updated..but actually it is not updated..but it is updated.........
Protected Sub Button3_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button3.Click
Try
Dim conn As New SqlConnection(ConfigurationManager.ConnectionStrings("guest1").ConnectionString())
Dim adp As SqlDataAdapter
[code]...
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Aug 21, 2010
I have a PIC program written in PicBASIC pro that sends out variables in word (ie 260, 458 etc). I would like to write a simple one form application that displays these variables in a box like this (just a mocked up image)In my search for VB code examples on how to use the serial port I came across one basic but functional example
Imports System.IO
Imports System.IO.Ports
Imports System.Net
Imports System.Data
[code]....
This is correct as there is only one variable that contains data at the moment (Temperatures(2) ), so the values are 0,0,261,0 for the first line. the increase in temperature was reflected in subsequent readings as it went up to 26.6C and then 26.8C.However I am now stumped... I don't know how I can adapt the code to brake the data up into the 4 variable and place them in to 4 different text boxes.
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Apr 23, 2008
I'm trying to receive data from the serial port and display onto a text box in my gui in vb. I'm using xp pro sp2 and vb 2008 exp.What i've done so far:
- I'm able to send data successfully (tested) to the serial port
- I can dispaly what data is being sent (tested)
Steps taken:
- I have looked around on this forum for something similar to what I have but no similar posts are here
- Will look into MSDN help shortly
- Will also try some vb books I have lying around. But the problem is most of the vb books deal with sql server and database stuff and not really interfacing to hardware.
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Sep 1, 2010
Is there a way to write in the code to dynamically update the COM port if the USB/Serial adapter is plugged into a different port?
2nd: How do I have visual basic output the LAT/LONG coords that I have have show up in a form box to a text file every time it updates from the serial GPS?
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May 16, 2009
I made my program and now I just need to add in the serial and trial part of the application. I know the application must connect to the host and go to a txtfile. How would i do the trial and serial. Also If the serial is already activated I want the application to reject that Serial and Count how many times they entered in a wrong serial.
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Jan 16, 2009
I'm trying to copy to the clipboard a text that is read from the serial port, but when try to use:
Clipboard.SetText(MyTexo,MyText Format) give me the follow error: Current thread must be set to single thread apartment (STA) mode before OLE calls can be made. Ensure that your Main function has STAThreadAttribute marked on it.
Im using VB.Net 2008 and is a single form program. What could be wrong.
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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 21, 2011
With this code i check the serial serialnumber of a usb stick.
[code]...
It is not perfect because the programma crash when there is no usb in de PC.But how do i search fot the sctick if it has a name , for example PPH ? And not G: , because it is everytime a different station.
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Mar 11, 2010
i am trying to write a simple programme to allow the user to open and read data from a RS232 port on a medical equipment and save the data into text file. Iam not a techie. I am totally new to programming save a few projects in foxpro(lol.....yeah oldshool).
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Jan 2, 2011
I do also want to know how can I Display Text on Pole Display. I write the code with VB.net 2008. Sample Code that I write is:
[Code]...
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Nov 21, 2010
I have a label that is supposed to display a word for 5 seconds and then move down the list in a text file and display the next word.I'm oddly able to make it work in random mode, but not going down the list in order.. random would be ok if used words didn't come up again.
Code:
Dim DurHold As String = My.Computer.FileSystem.ReadAllText(Application.StartupPath & "FlashWords.txt")
Dim DurDelimiters() As String = {vbNewLine}
Dim DurTextLines() As String = DurHold.Split(DurDelimiters, StringSplitOptions.RemoveEmptyEntries)
[code].....
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Oct 14, 2009
I'm trying to make an application which will log me into a site and read the text of the site and display a certain part of that text in my form. I'm stuck at the login, its a .php page with 2 text boxes, 1 check box and 1 button.Is there any way to manipulate those objects by using controls in my form?
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Jan 6, 2011
I am building a vb.net application with VS2010. The aim of the application is to change sln. files from VS2005/2008 versions into VS2010.I am using a Form with 2 text boxes and 2 buttons. When I click the 1st button it reveals the sln file in the text box. Then i have a 'convert' button that I want to use to 'convert' the file that appears in the first text box. I have come quite far with the source code but am just a bit puzzled as to how i can retrieve the VS2005 sln files and to get the 'convert' button to display the text in the 2nd text box.[code]
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May 15, 2006
Get Program To Read Text File And Display 2nd Line Of Text
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