Read Data Through The Virtual COM Port Created By Bluetooth?
Oct 25, 2010
Trying to read data through the virtual COM port created by bluetooth.
The original console program (and the trimmed version below) was designed to read data from serial port COM1 and output the data to notepad. The program works; hook the bar code reader to COM1, activate bar code reader, swipe card, bar code reader beeps, data input collected from COM1 and sent out to notepad.
The problem: Bluetooth is wanted instead of serial cable.
We disconnected the serial cable, we connected a USB bluetooth receiving device onto the XP. XP installed the bluetooth device drivers 'Generic Bluetooth Radio' and 'MS Bluetooth Enumerator'. Bluetooth detected the bar code reader device and created COM5 outgoing SPP slave and created COM6 incoming.
But now; activate bar code reader, swipe card, bar code reader beeps, NO data input collected from COM5.
[Code]....
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Aug 13, 2010
I am writing a small app that is retrieving data from a device connected to a virtual com-port. I connect without problems to the device using the settings 9600-8-N-1.
I need to send the command <esc>MS , the device then sends back the data to a computer. I have tried this using Hyperterminal with success. I also did this with Excel and VBA. I used the MSComm32 Active X control:
MSComm1.Output = Chr$(27) + "M" + "S" + Chr$(13)
Msgbox(MSComm1.Input)
This made the data from the device pop up in a messagebox. I am writing a winforms app in vb.net, using VS2005. I have a form, on which I have a Placed a SerialPort control, named sp. My sample code is as follows:
Private Sub Form1_Load(ByVal
sender As System.Object,
ByVal e
[CODE]...
This returns the error message "Error: expecting a command". I have done som tests in HyperTerminal, and have concluded with:
-If I dont send <esc>, I get error "Expecting a command"
-If I send wrong command (ie MD instead of MS) i get error "Bad command"
Based on this, I suspect that I don't pass the escape character correctly to my device. So I wonder how to do this?
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Nov 27, 2010
I'm mohammed from Oman ,I'm visual studio.net programmer How I can Read the Data From Barcode Weight scales By Serial port and TcpIp port
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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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Jan 9, 2009
i'm currently trying to make a connection between my phone to my PC using vb .net and a program I will build for my phone.my phone should send information (some strings) through the com port, I wrote in google "VB .net bluetooth" and I sew there is a library for vb .net, but I don't think I need that library, can I communicate with a com port without this library? like making a connection with a normal com port?If I'm right, how do I do that? how can I recieve information from the bluetooth com port?
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Jan 22, 2012
I have create a simple app in vb.net that receive data from a bluetooth device ( data are simple strings like "90123.9mm"). Is there a way to check if the device has closed the connection ?
[Code]...
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Feb 7, 2012
I am trying to create a client server application. I am going to make this simple so that a basic chat application. I have gone through these tutorials:
[Code]...
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Aug 19, 2010
How do you create a virtual serial port using vb.net
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Feb 25, 2009
I wrote a program that uses the following class from that site: VB.NET Tutorials - Serial Port Communication In VB.Net. The problem is that I cannot open a virtual serial port, and the second is that I want to make the communication asynchronous.
This is the subroutine which reads from the port:
#Region "comPort_DataReceived"
''' <summary>
''' method that will be called when theres data waiting in the buffer
''' </summary>
''' <param name="sender"></param>
[Code] .....
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Jan 10, 2011
I have a few USB devices that use standard Microsoft Virtual COM Port drivers. More specifically, I believe they use the "Usbser.sys" driver. Whenever I plug my USB devices in, they always shows up in the Device Manager as a COM port, however, sometimes I am unable to open that COM port. This problem occurs on both Windows XP SP3 and windows 7 machines (The only operating systems I have tested this on).
To be a little clearer, I can plug my USB device in, and then successfully open the COM port. I unplug my USB device, then plug it back in, and I am unable to open the COM port. The only solution to this problem is to restart my PC. Is there any solution in VB.net to reset any entrees made to the Windows system when the USB device is plugged in? Has anyone come across this problem and resolved it via a VB.Net solution?
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Jan 23, 2011
I need to communicate with a BlackBerry cell phone, so that I can query the current signal strength using Hayes AT commands, and store is into a file, along with my current GPS position.
I already got it to work perfectly using HyperTerminal:
- I installed BlackBerry Desktop Manager and I leave it running on the PC (otherwise it does not work!)
- I connect my BlackBerry Bold cell phone to the PC using a USB cable.
-The cell phone appears on the PC as a Virtual Com port, in my case it shows up as "COM13".
- I open HyperTerminal and connect to COM13 at 115200 bauds, 8 bits, 1 stop bit, hardware flow control
- If I type "AT" + ENTER, the phone answers "OK"
- If I type "ATI1" + ENTER, the phone answers with its model number "Platform: X.X.X.X, App version: X.X.X.X, PIN: XXXXXXXX"
- If I type "AT+CSQ" + ENTER, the phone answers with the current signal quality value "+CSQ: 21,99".
In theory it should be a piece of cake to query my phone using a serial port routine in VB.NET. The problem I have is that VB.NET allows me to read data from a REAL COM PORT, but refuses to read anything from a VIRTUAL COM PORT. When opening "COM13", I get "The given port name does not start with COM/com or does not resolve to a valid serial port. Parameter name: portName".
I did a lot a searching on Virtual Com Port on the WEB, but everything I see allows me to create a virtual com port. I only want to read an existing VIRTUAL COM PORT, not create a new one.So, I do I actually open a VIRTUAL SERIAL PORT, so that I can send the "AT+CSQ" command and receive my cell phone signal strength value using VB.NET?
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Oct 15, 2011
In My application I need to retrieve/Read data from USB port. Is it possible to Read data from USB cable?
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Mar 3, 2009
how to read data from usb port in vb.net
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May 27, 2010
how to read data from usb port in vb.net
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Nov 17, 2009
When using the SerialPort component in VB.Net, and when the event DataReceived occurs, and if we assume that the com port read 13 digits (Bar Code), how to read the whole data received (i.e. 13 digits) while in event without letting the event repeats 13 times and write the 13 digits AFTER COLLECT THEM in a text box (I don' want to write one-by-one digit in the textbox, all at once)
briefly: I want to read the whole data from COM port at once and write the whole data (not digit-by-digit or byte-by-byte)to a textbox.
I know it is SERIAL port but I want to write the 13 digits PARALLEL to a textbox!
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Aug 16, 2011
i am a absolute beginner and i want to use vb to receive data from micro controller through serial port using rs232 standards, i found this code to receive the data serially, can any one tell me where should i paste this code, so that the data received will be displayed in message box.Private Sub DataReceived(ByVal sender As System.Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) HandlesSerialPort1.DataReceived
[Code]...
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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.
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Mar 26, 2009
I've been struggling with writing my own Ethernet to serial program and just about to give up since I'm down to the wire on this project. I keep getting intermittent errors and I just can't get around them.
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Jun 2, 2010
I have a device which send me data over a particular port. The data is in XML Format.
Now I already did a small console application which listen for the data and print out the data on the screen.
Now my plans are to deserialize the xml data or I will create the insert statement into the database.
1) The device send me the data every second (if there is data to send me).
2) I cannot say how much data the device is going to send me.
How can I make sure to capture all data without loose any information..
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Jan 3, 2010
I am trying to read data from rfid tag using rfid reader. i can connect reader, but cannot get data?
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Apr 2, 2012
I am using a VB.NET(VS2010) to read data from serial port. I have 8-bit data to collect through rs232. This data is represented numbers. What reading method should I use and how to convert it to double format?
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Nov 12, 2009
I need to read data from the serial port Ive used serialport from the toolbox , but dont know how to use it. I used to do it on a Amiga like this
open serial("serial.device".0.2400.0) rem(open port)
repeat GW.w=readserial(0)
if gw>29 and gw<128
[Code]....
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Jun 25, 2010
I am trying to read data from serial com1 port. Now, I am not sure how to send. I found so many method to send but that are not so good and I cann't read any data. I am using VB.net 2005. Which is the best way and how can I read and send?
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Aug 23, 2010
I need to write and read data from a RS232 port. On the RS232 port there is a RFID Card reader-Writer connected. So I need to send hex codes to the device, and have to poll every 1sec if there is a card in the system. If there is a card I need to read the info that is on the card. My biggest problem is I think is that I am not sure how many characters there will be in return after the read command (maybe it is always the same length this I am not sure). What is the right way to read-write to the com port. So I always got the same result and not skipping a code.
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Jan 2, 2011
Using Visual Basic 2008 How can i read data returned from the serial port . also how can i clear the buffer.
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Sep 28, 2011
I want to create an application in VB.net that will read data outputted by a RFID reader on serial port.I want to know how will my application be able to identify the interrupt generated by Serial port and will read data from there?
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Aug 9, 2010
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[code]....
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Mar 14, 2010
I have a problem with my program. i can't read any data from serial port. when i click on open the rs232 has to read but it doesn't.i use the program in a pdf(ADAM-4000_Ed-15).[code]
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Nov 2, 2009
I am trying to make a program in vb 2005 to real all the data from a device connected on Serial Port (Com 1).i did this: [code]and this is how i want to reciveit.when i lounch the program i only receive first line "410001+00000001" and after that i get on the device rs232 error.
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Jan 13, 2009
Using 2008 VB.Net trying to do serial communications. I have a Scantron scanner I can send data to it, but I can not get read data back sent to my serial port. I have tried ReadLine, ReadByte, etc. but i'm not capturing anything, and I don't understand the DataReceived event. [Code]
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