Communications :: Receive Hex Data On Serial Port?
Jan 5, 2009
I 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].....
View 2 Replies
ADVERTISEMENT
Apr 12, 2009
I 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 Replies
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.
View 1 Replies
Nov 9, 2009
I 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 Replies
Jan 5, 2009
I 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
[code].....
View 2 Replies
Apr 20, 2011
I use ReceiveSerialData() function to get a string (20 byte of 8 bit data) from serial portBut I faild and got the error "operation has timeout". I am new in VB 2010
View 10 Replies
Feb 28, 2011
I am working on my project "PREPAID RESTAURANT CARD USING RFID TECHNOLOGY" in which i sent 12 digit number (rfid tag id) to serial port through my hardware and receive at my vb.net 2008 page.but i don't know how to receive data in vb page in the textbox using which cammand.
View 1 Replies
Aug 4, 2009
I am doing a project on sending and receiving sms from a serial port. But I have a problem on receiving sms. About the receiving sms, how can i show the received sms in the textbox using the serial port. Do I have to use the DataReceived Events. Here is the code i am using:
Public Class Form1
Private WithEvents serialPort As New SerialPort
Private ReadThread As Thread[code]....
View 1 Replies
Mar 23, 2011
I am having problem receiving data from serial port. Btw, I am new to Visual studio 2010 too.
I do a test program on my PIC so that when button1 press, it will send character "Y" to visual studio; when button2 press, it will send character "N" to visual studio. I know for VS 2010, sending data out is by the command
[Code]...
View 1 Replies
Jul 8, 2011
I have created a program to send and receive data from a serial port, some of the data needs to be stored in certain strings for a export to excel. However the data takes while to to send be sent back. So in order to get the right information in the right strings I have to put pauses in my code. I have added a timer to my form:
On my timer's tick event I have the following code:
Public Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
iTick = iTick + 1
End Sub
View 3 Replies
May 4, 2011
I am writing a VB based program which will receive data from a Micrcontroller (programmed in C) via UART. The data that is transmitted from the Microntroller can be displayed on Hyperterminal when I set it up with the correct settings (Baud, Parity etc), so I know that Microcontroller end is working fine. The VB-based program however (written in Visual Studio 2010 Express), does not however receive any data and I always get the TimeOut exception (despite the fact that Microcontroller is sending data via UART, I have an onboard LED to indicate this). Here is the VB code, it is an adapted version from the MSDN library:
[Code]....
View 11 Replies
Mar 7, 2012
I am working on a project to receive and send data to a micro controller using a Visual Basic application. I am using Visual Studio 2008. I have done coding to send data on button click event.
But I am stuck at how to receive incoming data to serial port continually from MCU and store it to an integer or string type data in VB.
View 1 Replies
Apr 8, 2009
I have an application that receives incoming data from a Radio Equipment through a hardware modem. How can I replace the hardware modem? Could I use the PC Sound Card in place of the modem?
View 9 Replies
Sep 17, 2009
I am wondering is there any code to get the text reply from the modem? I am using the itegno W3800 modem. I have used the below method so far but apparently VB.NET windows form doesnt see the incoming data. The message box comes out empty. But when i try the same method with the TMAS Siemens GSM modem, VB.NET can see the incoming data and display out the data string.
here is the code that i have written:
serialPort.Write("AT" & vbCrLf) 'set command message format to text mode(1)
receiveddata = serialPort.ReadExisting()
it works for the TMAS gsm modem.
The baud rate for the TMAS GSM modem is 9600 and the baud rate for the itegno modem is 115200.
For the itegno modem, the data is sort of like stuck at the serial port as after every time i pressed on the button for example "AT"
this "AT" command gets "stuck" at the serialport and run only when i have connected through the serial port in hyper terminal.
I am thinking is it the baud rate for 115200 is too fast for VB to handle? And also is there any way to solve this problem?
i have to revert back to the itegno modem for use for my project at the end of the day.
View 2 Replies
Dec 12, 2009
How do you add the "0" to the Hex value? What I get: 881 Should Be: 8801
Dim ByteCounter As Integer = 0
Dim DataPacketLenght As Byte
Dim Databyte(DataPacketLenght - &H1) As Byte
[code]....
View 2 Replies
Mar 8, 2010
For 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 Replies
Sep 21, 2011
I 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.
View 5 Replies
Dec 16, 2008
i 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]...
View 1 Replies
Oct 15, 2008
Im having problem with the Serial Port. When i run my program, "Access to the port 'COM1' is denied". What does that mean? Im not sure whats happening because theres no error in my code. Someone suggest me to use 'COM2'. Which is also the same result. I have a microcontroller, programmed and run it. And i need to capture the data onto my vb, which is on a multiline textbox. How to i do that?Just to double check my code?
[code]...
View 1 Replies
Jul 22, 2009
How can receive datas from EPBX through Serial port in vb net
View 1 Replies
Dec 15, 2011
I need to communicate with a PLC in serial port. PLC sends 4 possible data: 0, 1, 2 or 3 (which are status).My vb.net program uses IO.Ports.SerialPort class. When I read the data, the "1" and "2" are good, but the "0" and "3" are received as "?". I tried all the Read method (ReadByte, ReadExisting, Read, etc), it always give the same result. In HyperTerminal, it's fine.I made a test program in another computer (Win 7). Test was perfect, I received all 4 status correctly. I ran the same test program on the original computer (Win XP) and once again, I got the "1" et the "2" but the "0" and the "3" was "?" (ascii 63).
View 1 Replies
Apr 1, 2009
I 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 Replies
Sep 22, 2008
i 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 Replies
Jul 4, 2008
I'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 Replies
Feb 9, 2011
I 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.
View 15 Replies
May 7, 2011
Now 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 Replies
Feb 16, 2011
During 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 Replies
Jan 27, 2011
I 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...]
View 8 Replies
Oct 1, 2009
There 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 Replies
Dec 1, 2011
I 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 Replies
