Getting Scale Values From A Comm Port Into A Richtextbox Control?
Apr 13, 2012
I am getting scale values from a comm port into a richtextbox control, now as long as the connections and the scale is working great scale readings continuously flow into the control all the time, however when the connections or the scale is turned of the label that displays the weight will give a message saying error.
After 5 seconds I want to be able to give the operator the choice to take scale readings manually. This is my code so far.
Private Sub tmScaleTimer_Tick(sender As System.Object, e As System.EventArgs) Handles tmScaleTimer.Tick
If rtbDisplay.Text.Length = i Then
[Code].....
how do I restart the timer if the interval has elapsed
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Jan 27, 2010
Basically I need to send the hex command FA through a COM port.
I have added the com port and set the baud etc and all seems to be working well there. I am just a little unsure how to send the correct hexadecimal command. For example,
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
SerialPort1.Open()
[Code].....
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Apr 29, 2011
Is it possible to create a logical serical port in vb that another application can open and read/write to?
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Nov 2, 2011
I currently have software that sends out plain text(i.e. 'X') to comm 1 port and was wondering if there was any way to capture that plain text and also respond to that port on the same compute as the port without having anything plugged into the machine (i.e. 9 pin serial cable). I am trying to avoid buy any more hardware as this is an objective to acutally cut down on hardware.
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Nov 27, 2011
I used microsoft com control 6.0 in the application for sending data to the led control
MSComm1.EOFEnable = True
MSComm1.SThreshold = 100
MSComm1.InputLen = 0
[code].....
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Dec 31, 2009
Now I know whats going to happen, I will post a request for code syntax and one of the admins is going to say that I need to post the code I already have. The code I already have is irrelevant to what i wish to do. So, continuing on; I have a micro controller that i wish to send commands to it in HEX data type. Communication is via the serial port RS232. (well technically its through the USB to serial converter)Steps:
1) Sending a "001" tells the micro controller to await instructions as to what to set the duty cycle to
2) The data that follows i.e." 050, 010, 185 " will be added to 400 (by the micro controller) to come up with a duty cycle based on a 10 bit resolution of 0-1024. I am only going to be using the range of 401- ~500.
I can communicate with the micro controller via hyper terminal. Using the Alt + #keys method I can transmit data to the micro controller, and this is what i with to do with vb.net.[code]
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Feb 22, 2007
I have an older VB6 application which uses a scanner on the COMM port and does the following... (I have been tasked with re-writing it in ASP.NET (VB)...
OLD APPLICATION...
1. reads a Scanner and loads the data onto the PC
2. FTP's the data file to a SQL Server (where a small app picks it up and processes it)
3. Deletes the data from the scanner[code]...
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May 3, 2006
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.
[Code]...
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Apr 8, 2010
I did a search for "How do I implement Serial COM Port communications? and found a response by Xiaoyun Li which was last posted on April 10, 2009. Xiaoyun's response included sample code. My intent has been to get a clean compile on the sample code, then test it, then expand the code into a real application. I am down to a single error message, which I can't figure out how to resolve: "Method 'Public Sub DoUpdate()' does not have a signature compatible with delegate 'Delegate Sub EventHandler(sender As Object, e As System.EventArgs)'." [code]I marked where the error occurs in the code with *** to the right of the error line.The code is attached to a simple form, Form1 which contains a single text box, TextBox1.It appears to me that the code needs a Delegate statement, but I can't figure out how to code it or where to put it.d.
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Feb 9, 2010
I am writing a VB.NET app that has a piece which needs to send a small command to comm port 2 and get the return result. The problem is .NET doesnt have any support for serial communication seems like.
I just need to send the command "headtype" and get the result.
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May 18, 2010
I have recently developed a serial port communication program to access my hardware firewall and its connected to the device via a converter usb to rs232head plugged to a rs232 to an ethernet cable. this ethernet cable then plugs into the device console port.
my program functions similar to that of TeraTerm. an opensource hyperterminal program written in C++ but i decided to do one for vb.net
Alright to cut the story short, i have successfully coded out the program to accept incomming data from the device but however, i'm also receiving ansi escape sequence along with it and i have no idea how i could implement codes to remove these. i have spend 3 weeks trying to look for vt100 emulation codes written in vb.net but i found none so far. most are written in c++. here's an image to illustrate the problem which im facing.
The image below is a screenshot taken when the i ran both the programs together. The bottom is tera term 3.1 and the top is my vb project which i made using msdn's example and improved on the codes. basically tera term was able to interpret those escape sequence and display accordingly to that of the vt100 terminal display. I have spent time reading on regular expressions using the inbuilt function regex in visual basic and tried parsing some strings but its not working. i guess its far more complex than i thought.
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Nov 10, 2009
I'm currently working on a project where I am transmitting data from a comm device via the serial port and resorting the raw data (in binary) to its respective ascii values. The problem I'm facing is determining the most efficient method to accomplish my goal. Essentially, I have 68 bytes coming in, the first and second bytes represent the page and packet number and the data itself ranges from 3 to 64, the remaining for my checksum.
What I am needing to do is, grab 50 consecutive bytes per variable in my array, and that is where I'm confused. I have easily pulled my 3-64 bytes and stored that data to a string. I just don't know the most efficient method to accomplish my goal. Should I write directly to file all my data, as there are like 8 pages, of 128 packet data. [Code] I can capture the the first 50 by using a for-loop easily, but what would be the preferred method to track what data chunk I've taken? The more I think about it, I think I may just want to write to file, all my data, and then just take them back to back in 50 byte chunks. Is that the most efficient method?
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Apr 18, 2010
I;m attempting to write code to read several NMEA ports and format the data for archive. When I execute the following code:
Using Commportno As IO.Ports.SerialPort = _
My.Computer.Ports.OpenSerialPort(portName:=port)
Dim Incoming As String = Commportno.ReadLine()
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Aug 27, 2009
i am developing an application which needs to connect to a weighjng scale throug rs 232 and capture the output. after inserting the record however the pc needs to send the tare command to the weighing scale in order to set the scale to zero. now he tare character as far as i guess ia T i sent the command like this
serialport1.write(chr(27) & "T" & chr(13) & chr(10))
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Jul 17, 2009
Do someone know if there is a\\ USB control for the USB port communication? like the SerialPort control for the COM port.
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Jul 26, 2010
I have a winform with richtextbox. I want to get the user input values in any window like chat programs(msn,yahoo,gtalk), Ms Word,...etc, and set the values into richtextbox?
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Nov 10, 2010
I'm writing some VB2008 code to control four 7-seg LEDs I bought from Velleman. They came with some example code in VB 5.0, and with instructions telling me to input 5 bytes at a time in the format Chr$() & Chr$() & etc. for the rest of the 5 bytes. When I try to do this using VB2008, it rejects the $ sign, so I've tried it using the Chr() format, which VB2008 allows. However, it doesn't work. Is Chr() the new version of Chr$() or are they different entities? In sending data to the LEDs, I'm using LiveComPort.WriteLine() as my command. (My serial port is called LiveComPort) I also tried it with LiveComPort.Write() asthe command. I know that my serial port and the LEDs are working, because they respond to the demo program provided by Velleman.
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Jul 18, 2011
I want to send hex values across the serial port. I know, I know, your thinking not this again. But what I need to do does not seem to be addressed, or I am some how missing it when I search around.
[Code]...
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Mar 4, 2010
Can somebody give me a hint how to multiply each line in a richtextbox with a value?The richtextbox will have ex. 1000 lines with numbers, and I want to multiply all these lines with with a number.
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Dec 10, 2009
There is a richtextbox containing either 'True' or 'False' at each of it's lines. Let's say for example that it contains 100 lines. The 2nd line is 'False'. Through a contextmenustrip I would like to be able to select that 'False' value and have an option saying 'apply to a range' of lines. The program would ask for the number of lines the user would like to apply that value, and apply that value to the lines he specified. [Code]
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Apr 15, 2012
I'm trying to build a sales program in which by adding multiple items in a RichTextBox, with the click of a button, the program can sum the price of these items and put it in a TextBox as the total sum of these values.I've been going nuts about on how to write the code for this..It's the last part of the program that i need to conclude ir.
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Aug 2, 2009
I'm trying to build a sales program in which by adding multiple items in a RichTextBox,with the click of a button, the program can sum the price of these items and put it in a TextBox as the total sum of these values​​.I've been going nuts about on how to write the code for this..It's the last part of the program that i need to conclude ir.
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Dec 14, 2009
I have a richtextbox, with random values in each line:
a1,a2,a3
b1,b2,b3
and so on.
This textbox stores the values in a jagged array after lostfocus. What i am trying to do, is for the user to have the ability to 'switch' values in each line if he wishes to do so. Each switched element becomes the first, and the first goes where the old value was. So it's basically a 'swap'. For example:Line1: a1,a2,a3 --> user highlights "a3", right clicks and a contextmenustrip appears with the option 'switch', once he clicks a3 goes where a1 was and a1 goes to a3. So the new Line1 would be: a3,a2,a1. After that if he switches a2, new Line1 would be: a2,a3,a1 Once the switch is done in the array, redisplaying the data in the RTB is not a prob.
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Aug 22, 2009
I have writen a piece of software which takes values from a serial port, peforms some calculations and then records the result in an Excel file.It also uses some values stored in an excel file for reference.
The program will run fine for days/weeks until the PC is rebooted mid run.Once it gets rebooted mid run I ge the error "RPC_E_DISCONNECTED"This then occurs everytime the program is run.Full error file below.I'd like to code for this error of course but even a simple fix to stop it happen once the PC has been rebooted to allow it to run again would do. I can give more details but I'm not sure where to start.Target system is windows XP SP3 with office 2007
[Code]...
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Dec 10, 2009
How to control LCD 2X16 or 4X20 by the LPT port?
I have these two LCDs, I wired them and connected them to the LPT port and used free programs from the net. they work fine. I would like to learn how to do that in VB.NET. Maby program a form to show time and date and display the contenant of TextBox.
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Dec 7, 2009
I have a button which reads a comma separated value file and loads it into a richtextbox. Each line contains comma separated chars.
Once the file is loaded in the richtextbox, i want to be able to select specific values from each line and store them into an array.
For example:
Line1: a,b,c,d,e
I want to be able to place only the values "b" and "c" into an array.
I was thinking something like creating a menu for the richtextbox which will be triggered on right click, then highlight the values I want, press right click and select 'place these values in an array'.
it doesn't have to be the way i proposed it, but it definitely must use a richtextbox.
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Jul 12, 2009
I have a simple USB fan that just runs on the power from the USB port. I want to be able to turn of and on the fan from a simple application.
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Aug 16, 2008
Does any one know where I can find a ruler control that inherits RichTextBox Control for VB 2008 with code. I am building my own word processor and I am trying to make it look like MS Word. I am somewhat new to this, so take it easy on me ladies and gents. i am using VB 2008 Express Edition, Windows Form.VB 6.0, VBExprss, ASP,Net, & Gaming
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Jul 15, 2009
What are the possible handshaking protocol available using COMM-DRV for communication through MODEM
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Mar 9, 2009
I have been writing a COM callable assembly for my current solution allowing unmanaged code some access. I have just been told that I can now start using 3.5 of the framework having used 2.0 for some time.I then came across WCF and was wondering if I could use any of this to create my application api and allow access from anmanaged code.
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