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.
View 6 RepliesI 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?
View 1 RepliesI 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.
View 12 RepliesI 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?
View 2 Repliesi 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
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I'm currently developing an application on Visual Basic (2010) which requires the use of a Thin Client's serial port. I have already activated the port mapping, and tested the communication (successfully) with PuTTY. How ever when trying to use my software y receive a message The selected port name is invalid, or it is not a serial port.I have already made some successful tests with a common PC with positive results.
View 6 RepliesIm 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?
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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
View 7 Repliesi have some code here that is used for a project, the code is used in visual basic 6 and i am using visual studio 2008 in the project i have to communicate with a PIC micro controller, i do not know what to do because in visual basic 6 w use MS comms and in visual studio 2008 uses a serial port thing code below.[code]
View 3 RepliesThe 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.
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I'm trying to read barcode using a scanner through a serial input(com1). Below you will see the code I'm working with, when I scan the barcode the code goes through the datareceived event and doesnt add the read barcode to the listbox. However when I use hyperterminal and scan the barcode it reads and displays the barcode.
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I am trying to read data from rfid tag using rfid reader. i can connect reader, but cannot get data?
View 4 RepliesI 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?
View 4 RepliesI 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]....
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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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]
View 3 RepliesUsing 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]
View 15 Repliesi am trying to write-read data from serial port but it don't work my code look like this
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I have been using VB 6.0 and new to VB.net (VB 2005) I want to know how to read characters from RS-232 port.
I have created serialport object and want to read this sort of thing "A,2451.3955,06715.8253"
I'm having trouble with parsing an XML data from serial port.Actually I need to parse it automatically after all data is received from serial port.I can display all the data in a richtextbox control and all data is received perfectly but my problem isit seems that serialdata.eof function seems like it's not firing.
here's some of my code:
Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'set serial port properties
With COMPort
.BaudRate = 19200
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what i need to know is how can i automatically parse the XML data from serial port after all data is received.
i am trying to write a simple programme to allow the user to open and read data from a RS232 port on a medical equipment and save the data into text file. Iam not a techie. I am totally new to programming save a few projects in foxpro(lol.....yeah oldshool).
View 4 Repliesim using vb 2008 to read serial port data. my requirement is as follows, when the data is received from the serial port a timer is enabling in order to blink a button saying "tank empty". so i have written the code with the aid of this forums. but now my problem is the blinking button function is not working. first i thought its cuz timer is not enabling inside the serial_dataReceived event. so i invoked a dummy label. so the timer works. but its blinking function is not working.
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I have a quick question regarding the serial port and timer tick event. Basically i have a micro processor connected to the PC via the serial port. With a baurd rate of 38400 set.When the PC sends the micro ":K + VBCRLF" the micro response with a string of information (ASCII encoded) and delimited with a "," and at the end of the transmission a cartridge return line feed is added.Example of sent string:
"12,1134,123,545,76,6868,34,232,1,2,3,6,7,8" These numbers are then split using the VB mystring.split(",") function into an array of strings, then the numbers are converted using ctype. After which my UI is then updated.I have Witten the code in a tick timer event using a timer count of 300ms. Although the program runs and the UI is updated i end it with lots of exception errors. I think allot of this is down to the serial port either timing out or not reading complete string.Or possibly the timer has not executed all the code before another tick event happens Even after adding a few try catch statements i am still having problems. Can anybody suggest a better way of doing it?I was thinking of using a do while loop and at the end a sleep function instead of the timer tick event.I need the speed as i am trying to read and display live data.
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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?
View 1 RepliesWhat i need to write is i get different signal from PIC16F877A and through serial port, i need to display diffrent text from different signal, Such as: Signal from portB.1 display 1, signal from portb.2 display 2. Between the microcontroller and serial port im using MAX232.
View 2 Repliesi am new to VB.net and i am writeing a program to read a serial port and if there is any thing in the buffer i want to read the data and put it in a string then clear the buffer
View 1 RepliesIve got a big problem.I need to read data from the serial portIve 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].....
My program connects via the rs232 port to a pump and it managed to start the communication and sending data. But the problem arises when i try to read the return signal from the pump to pc. This is the piece of code i've used:
Code: Dim returnbyte(0) As Byte Dim ByteIndex As Integer = 0
Do While ClassSerialPort.BytesToRead <> 0 ReDim Preserve returnbyte(ByteIndex) returnbyte(ByteIndex) = ClassSerialPort.ReadByte() ByteIndex = ByteIndex + 1 Loop
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I obtain the following results:
Code:... 6 12 0 0 0 92 ...
From the manual i understand which byte to read. For e.g 6 = ACK. The problem is how to interpret the 4 bytes together in a string for e.g 0 0 0 92 means 9.2ml ?Is there any way to read the decimal point?
I am using Scanpal2 to read data and as per its documentation as follows
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