RS232 End Transmission Character - Put The Word "END" In The Microcontroller Code?
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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Mar 13, 2009
I have a problem regarding rs232-usb converter... I'm using toshiba laptop. The problem i faced is i can receive data from my microcontroller to VB but i cant send data to microcontroller... However, when i use the same VB code and same converter, i try at my friend laptop (other brand), it works... May i konw is there any other setting i need to set for my laptop??
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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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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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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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Dec 12, 2011
Hi, I'm trying to develop a VB GUI that allows the user to download assemler code (Hex file) into microcontroller via a LAWICEL CANUSB.
I can now send signle message(8 Bytes.: example t1F0200081122334455667788, with ID:0x1F02000, DLC: 8 Bytes and Data:1122334455667788)
[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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Nov 5, 2009
The vb.net code is functioning correctly as it talks to a device through COM1 serial port.What I was hoping was the equivalent c# code is not creating the same string and as a result, the serial 'packet' is not correct. Check this illustration of my problem [URL]...
My goal is to eliminate the addition of the extra characters '/0' and '/b' that what I hoped was the c# equivalent to the correctly functioning vb.net code. It just occurred to me I should change the code to employ Stringbuilder. The 'packetbuilder' method/function builds a string and keeps concatenating things to itself.
[Code]...
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Jul 15, 2011
I have a value I am pulling into a string that looks like this:
M'arta
I need to have it to translate the numeric value into an actual value so that the string looks like this:
M'arta
how to accomplish this in VB.NET? Here is the relevant line of code that returns this result:
Dim occupant as String = GridView1.Rows(e.RowIndex).Cells(2).Text
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Feb 1, 2011
I'm able to convert a character to its corresponding Character/ASCII code using "Asc(CHAR)". I can't find anything on converting this returned Integer back to its original Char form.
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Nov 3, 2009
Is it possible to uppercase the first character of each word using regex?
I'm going to be using this in VB.net (SSIS)
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Oct 18, 2011
i am trying to copy the whole word after finding the character that i want.
I have managed to find the character i want quite simply :
With Selection.Find
.ClearFormatting
.Text = "@"
[Code].....
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Nov 18, 2011
The assignment is to separate the consecutive characters in whole word .
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Feb 17, 2012
How can I replace character/word in text (loaded to richboxtext) but only for those which are not on the "block" list ?
Dim str As String = RichTextBox2.Text
RichTextBox3.Text = str.Replace("1"c, "A"c)
But I want add list of words which should be excluded. I thought that I can do something like :
Dim str As String = RichTextBox2.Text
If Regex.IsMatch(RichTextBox2.Text, "shows") Then
Else
RichTextBox3.Text = str.Replace("%"c, " "c)
End If
RichTextBox3.Text = str.Replace("1"c, "A"c)
Dim str2 As String = RichTextBox3.Text
RichTextBox3.Text = str2.Replace("2"c, "B"c)
But it's not working as it will just skip replace of % for whole text and I want just just exclude particular word from list from being replaced...
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Jul 17, 2009
I am using a simple regular expression (in C#) to find a whole word within a block of text.
The word may appear at the beginning, end or in the middle of a the text or sentence with in the text.
The expression I have been using word has been working fine however if the word included a special character (that has been escaped) it no longer works. The boundary is essential so that we do not pick up words such as vb.net as a match for .net.[code]...
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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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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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Jul 28, 2009
i am talking about this [URL] device
1 what namespace referce do i add ?
2 what imports statement do i use ?
3 how do i make output input commands ?
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Aug 28, 2010
I have two textboxes (InputTextBox, OutputTextbox).In the InputTextBox, if I type "a" I need to display tamil letter "அ" in OutputTextBox.For the above requirements, I tried like below,
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Mar 11, 2010
Is there any code that will make possible check if the user typed a word i want in order to show him something ? something like , if the user types time , or tim or timing or the word time and transformated to show him up the time ..
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Sep 21, 2009
i want to activate robotic parts using a pic microcontroller with vb.basically i want to use the thechniques shawn in this video :
[URL]
here are my questions :
1 what activex do i add ?
2 are there any references i need to add ?
3 are there any imports statements i need to add ?
4 are there classes i can add ?
5 what commands do i use for output ?
6 what commands do i use for input ?
7 can you recomend a specific microcontroller ?
8 how do i add hardware to the device ?
9 what commands do i need to add so the software doesn't glitch ?
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Apr 26, 2010
I've already wrote a simple program for connecting to a serial port that can send data to the microcontroller, do some basic arithmatic and transmit it back to my Form. This was just to see if I could set up the conection.I have a PIC Microcontroller giving an 8-bit number thats is taken from an external sensor device.What I want to do now is to present this data from the microcontroller in a textbox as a number either in real time (as the sensor output changes) or if not possible, on request (using a button).
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Aug 9, 2010
<!-- /* Font Definitions */ @font-face {font-family:Wingdings; panose-1:5 0 0 0 0 0 0 0 0 0; mso-font-charset:2; mso-generic-font-family:auto; mso-font-pitch:variable; mso-font-signature:0 268435456 0 0 -2147483648 0;} @font-face {font-family:"Cambria
Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:1; mso-generic-font-family:roman; mso-font-format:other; mso-font-
[code]....
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May 18, 2010
I have written a program in vb to serial in data from my microcontroller and it is working good except for one thing. When I try to send the number 26 to vb it just reads a blank I dont know what is going on? The data that I am reading is being converted to int16, and I am using Encoding 28591 and have also tried Encoding 1252. I have also tried a new microcontroller with no success. I dont know if this is a VB problem or a microcontroller program problem.
Dim ReceiveBuffer As String
Dim portname1 As String = "Com5" ' Serial in through this port
Dim portspeed1 As Integer = 19200
Dim WithEvents COMPort As New System.IO.Ports.SerialPort
[CODE]...
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Apr 13, 2011
Is it possible to get character character code in Visual Basic 2008 and to get character from character code ( Without form1_keyDown or KeyUp)?.
What i need is two functions, first to get character code of a character, and second to get character from character code.
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Sep 6, 2010
Ex. my word doc is "123456789@abcde" i want my range is "abcde".
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Mar 5, 2012
This might be a really easy one but I couldn't seem to find an answer anywhere I'm trying to comment my code as follows
Session("test") = "JAMIE" _
'TEST INFO
& "TEST" _
'ADDRESS INFO
& "ADDRESS = TEST"
With the code above i'm getting the error Syntax error But when I remove the comments like so
Session("test") = "JAMIE" _
& "TEST" _
& "ADDRESS = TEST"
It works fine so my guess is that I cannot comment my code between the _ character.
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Mar 5, 2009
I have been making a VB app that adds two text boxes together. This all adds up fine but I was wondering if there was any code to be able to turn the answer into a value such as 10.54 instead of 10.54653
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Nov 19, 2008
I have been making a VB app that adds two text boxes together. This all adds up fine but I was wondering if there was any code to be able to turn the answer into a value such as 10.54 instead of 10.54653Basically turning the answer into a money value?
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Feb 17, 2011
Is Win32 API a good approach for use with USB communication between VB2005 and a microcontroller with USB capability? If so where can I find these APIs?
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