Communications :: Connect And Read From Serial Com?
Sep 22, 2008my code to read from serial port and store it in a variable?
Public Class Form1
'SerialPort object creation
WithEvents mySerialPort As New IO.Ports.SerialPort
[Code]......
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Communications :: Serial Port Read Wrong Return Result?
Dec 17, 2008Anyone else have an issue using read, It appears when I use read it gives me the correct buys but returns the wrong integer value So I use it and it fills the Array i make with &h10, &h6 but read reutnrs number of bytes returned to 1. if there a better way to go with Vb.net with RS232 I mean really my projet dosent have anything out of the Normal
Friend WithEvents CashValidator As System.IO.Ports.SerialPort = New System.IO.Ports.SerialPort("COM1", 9600, IO.Ports.Parity.Even, 8, IO.Ports.StopBits.One)
CashValidator.Read(MyResponce, MyResponceLen, 4)
Communications :: Like A Serial Port
Mar 8, 2010For many years, I have sent data between 2 computers using serial ports."Here is the data", "Thank you for that data!" type stuff.Where do I get more information for doing the same thing with 2 computers that are networked together? Assume a local ethernet connection.I have experimented with serial-ethernet modems and that works well but I don't want any more hardware.Is there a good thread here I should read?I want 2 VB programs running and I want to exchange data periodically.
View 2 RepliesCommunications :: Listening To The Serial Port?
Sep 21, 2011I am trying to listen to the COM3 port and display the output in the TextBox. If I understood correctly I will have to implement this by using eventhandlers, delegates. I tried following these articles:
[URL]
And this is the code I came up with... Unfortunately it doesn't display anything. App just starts display "True" and no data is being displayed. I am monitoring Arduino platform which I know is sending data constantly.
Code:
Imports System.IO.Ports
Imports System.Text
Public Class ArduinoSerial
[code].....
I am really new into the vb.net. I am sure there are some horrible mistakes with this code but I am kind of stuck for the past 2 days on this one.
Communications :: Reading From Serial Port?
Dec 16, 2008i am using serial communication to read from a plc.The plc will send a string :&H3A as a header byte then C(which is a variable that contains data)I want to read and mask out the header byte.I use the following code but cannot read anything.
Private Sub btnread_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnread.Click
Msg = SerialPort1.ReadExisting
count = Val(Mid(Msg, 1, 2))
Lblno.Text = count
[Code]...
Communications :: Disable Encoding For Serial Port?
Apr 1, 2009I am trying to transmit the integer value 360 to serial port. but at micro controller i am getting the 3 bytes (33 36 30) its ASCII Values.So is there any way to transmit the 360's hex value 168 using two bytes only like 01 68 only?
View 2 RepliesCommunications :: Receive Hex Data On Serial Port?
Jan 5, 2009I am trying to recieve HEX data from a seriall device. Code is as below . but the required output is not correct. Some chracter code are not correct even in decimal. like for 80 i recieved 3F and for c0 also. for example i recived a string .
10 02 3F 00 10 03 3F 61
but in actual data should be
10 02 80 00 10 03 c0 61
Public Sub DataSeriallReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort.DataReceived
Dim buff As String
[Code].....
Communications :: Receive Text From Serial Port
Apr 23, 2008I'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.
Communications :: Serial Port Responding Slow
Sep 22, 2008i have an application where i send data(a question in a "packet" of 8 digits) to an external controller via serial port, and then that controller sends me back some information(the answer, in a "packet" of 8 digits, not necesarily zeros and ones)I have develope a simply software that is getting the correct data form the controller, here it goes:[code]So now i can see how many times the code needs to enter the loop to get the "answer" from the module.Now i know that the code needs to do the loop from 5000 to 18000 times to get the answer each time!!!!, so that is why the software keeps getting freeze.I supose that that time is neccesary for the module to give the answer, so i think i can't get better respond times, but i would like the software not to get halt.
View 3 RepliesCommunications :: Setup A Virtual Serial Port
Jul 4, 2008I'm writing an app with takes 3 readings off LCD displays via serial ports. The module which scans the serial ports is getting stuck in a loop for around 1.5 seconds. I need it to be much quicker than that. Is there a way I can setup a virtual serial port so I can run test it on my PC. Its very tedious and time consuming of making changes and visiting the machine its for.
View 1 RepliesCommunications :: Transfer Image Through Serial Port?
Feb 9, 2011I have a barcode scanner that beside scanning the barcode it also snaps an image. I wrote a simple application that searching all ports locating in which one the scanner is connected and opening the port.
I can easily read any barcode and the send command to the scanner to pass me the image taken on the port, but i have a problem re-constructing the image from the bytes i read.
Code:
sendCommand()
Dim img(SP.BytesToRead) As Byte
SP.Read(img, 0, img.Length)
[Code]....
I can get the image from the scanner in any format needed (jpg,bmp etc) so no need to provide a precise solution just a general idea.
PC Communications To Intelligent Instrument With 485 Serial Port
May 7, 2011Now I'm doing a VB project about pc communications to a intelligent instrument with 485 serial port. I want to use API but I'm not good at it.
View 2 RepliesSerial Port Communications: Turning Of ECHO?
Feb 16, 2011During Serial communications, is the echoing back usually done by the serial port interface or is it done by the UART at the far end?
View 10 RepliesCommunications :: Arduino Board: Communicate With It Using Serial Port
Jan 27, 2011I 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...]
Communications :: Close Serial Port After USB Device Unplugged?
Oct 1, 2009There seems to be a lot of discussion around about handling exeptions when a USB serial port device gets unplugged. What I want to know is how can one re-attach to it once it is plugged back in. The problem is that if you unplug a USB serial port device the app doesn't know it has gone and remains convinced it is still open. I have to close the app completely before I can re-attach to the device. I need a way to force it to close/go away.
View 2 RepliesCommunications :: Modifying Existing Code For Serial Communication?
Sep 21, 2009I've seen this great example of serial communication in VB.NET
[URL]
I try to use it in a project I am working on but somethings are not clear to me.
1: Now the send and received data is shown in one RichTextBox but I would like to split this into two RichTextBoxes (RtbSend and RtbReceived).It is unclear to me how and were data is assigned to the RichTextBox?
2. the received data is shown in the Richtextbox as one long line, I would like to get a new line for every send message.So for example: I I send "test" four times, I would like to see:
Test
Test
Test
Test
now I see: Test Test Test Test I've tried ctrlf but this does not work.The example describes that "comPort_DataReceived" is executed when data is waiting in the buffer. Where can I see the eventhandler responsible for this? How does it know data is waiting?The problem is this kind of coding is a bit to difficult for me. I want to understand the code before I implement it into my project.
Communications :: Send 8-10 Character Strings From The PC Serial Port?
Dec 1, 2011I have quite a bit of VB6 experience but now am trying to create my first VB.Net project. The project is very simple - it just needs to send 8-10 character strings from the PC serial port. The problem I'm seeing is that VB.Net is always sending out a 0x0A character after each 'WriteLine' call. Using VB6 it was necessary to manually send out any End Of Line characters. My application requires that no extra EOL characters be sent after the string.
View 2 RepliesCommunications :: SEND/RECEIVE Data From Serial, CPU Speed?
Nov 9, 2009I need to send data via serial and wait for and answer (VB.NET).Right now i'm doing it this way:SerialPort1.Write(sel & Chr(13))Thread.Sleep(50)aaa = SerialPort1.ReadExisting()If i do not thread.sleep, i get nothing, i supose it's because the machine is too fast.
View 1 RepliesCommunications :: Serial Port Input For Barcode Scanner?
Nov 11, 2008i 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?
View 1 RepliesCommunications :: Freeware Program For Serial Communication That Is Better Than Windows Hyperterminal?
Aug 27, 2008Like the title says, is there a freeware program out there for serial communication that is better than Windows Hyperterminal?
View 1 RepliesCommunications :: Serial Port Communication Via Null Modem Cable?
Sep 4, 2009I have a VB.net app running on one computer, displaying text into 2 texboxes or labels.I need to see the two values in two sperate textboxes or labels from the two labels on another computer via a null modem serial adapter.
1st computer.
Code:
serialport1.writeline(label1.txt)
straight forward right?
2nd computer to read the data
Code:
Private Sub SerialPort1_DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived
dim s as new string = serialport1.readline()
label1.text = s
This is what I was thinking;
Code:
serialport.writeline(label1.text & label2.text
This would send the two values over the serial port. How would I seperate the two values and display them in two different texboxes?cannot use them together)Am I on the right path at all? Or using the serialport.writeline method won't work at all....
Communications :: Unable To 'activate' Serial Port Like Putty Or Hyperterm
Aug 18, 2009I'm trying to write a bit of code to communicate with an RS232 coin mech.The problem i have is that the coin mech works fine when used with Putty or Hyperterm but i do not appear to be able to 'activate' the serial port with my code.[code...]
When i open the hypertem or putty session the coinmech's active light immediatly comes on and i am able to send and recieve data. When the port is opened with the code nothing happens.
Serial Port Communications - AT Commands - Send And Receive Data
Apr 12, 2009I have a USB modem that can detect caller ID and can detect dialled digits when special AT commands activated, How to send and receive data. The sent data will be the AT command such as AT+VCID-1 to activate the caller ID, the received data will be caller ID information and the digits dialed. I'm new to prgramming and using Visual Basic 2008 Express.
View 8 RepliesCommunications :: Allow The Client To Connect To Multiple Servers
Oct 24, 2008I have this code below for a client module, to allow the client to connect to multiple servers, though a IP list. The problem is that it is connecting ok to the servers, and it is sending messages to servers, but is not receiving messages FROM servers.
[Code]...
Communications :: Connect A Computer Fan To The Usb And Control The Speed?
Dec 22, 2008can 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??
View 1 RepliesCommunications :: Connect To Several URLS At The Same Time And Add Information To A Listview?
Feb 8, 2011im trying to make a program that connects to several websites and parses some information out and then add the information to a listview list.The listview have 2 columns: Site and Nuts. So i load a bunch with urls in the site columns (that isnt a problem) but the problem is to take 5 websites at the same time and connect to them and then write "OK" in the Nuts columns.
In VB6 i could easily make 5 sockets, and then move down five items in the listview, save each of the listview text to a variable and connect to each variable with different socket, but how i add the information to the column "Nuts" is also a challenge in vb6. In the other hand, in vb.net i haven't yet got the skills to do so.
Serial Port Example Code - Connect To A Modem Thru The Serial Port
Oct 26, 2011The link below has code to connect to a modem thru the serial port but it is for an earlier version of VB. when I convert the code, it does not fully convert and has 4 errors that prevent building the project. can someone tell me what needs to be changed or added?
[URL]
Note: the error: not CLS-Compliant
Connect To Serial Port And Get The Data From That Using VB
Jan 12, 2012I want to connect to serial port and get the data from that using vb.net how to do this.........
i have found one sample and i tried that but in that datareceived event is not firing
Communications :: Using Telnet To Read A Sensor
Jul 28, 2009I am using Telnet in VB to read a temperature and RH sensor. I don't know that the data is the exact same length every time. I have pasted the code below. This code does get the data back. I have also pasted the unparsed and parsed data as well.... Sometimes I get more or less data than the time before and I think this is because I am not reading the entire buffer. How can I make this code run a little better so that I can get the proper data every time? Below the code is a sample of several readings. You can see how I get bad data periodically.
Unparsed
" 24.4155 45.2235 11.7921 200.9005 45.2372 45.2235 -42.0242"
Parsed (replaced " " with , and then " " with ,)
[Code].....
Connect To External Device Using A Serial Port
May 25, 2010I'm trying to connect to an external device using a serial port. I found a couple of tutorials with demo code and tried these. Unfortunately they all return the same gibberish unreadible result.[code]I'm sure my port settings are correct (I have the communication protocol of the device.)
View 20 Replies