I'm trying design an aplication, who receive inputs from a Photocell omron.
I will connect this photocell at serial port, and it, when detect movement, close the circuit.
How can I verifi in the serial port, if the circuit is closed ou opened?
The 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?
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Note: the error: not CLS-Compliant
I 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
I'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 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 am trying to make my own hyper terminal. I have used the serial port component and after setting all the configuration for the com port I press the button Enable ComPORT. The problem is that, when I press the enable com port button the program goes unstable untill the reception starts from the COM port. After the reception is start the program starts working fine.
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m really not sure in here because this code is for vb .net 2003.. are they the same?
I have microcontroller interfaced with serial port of my computer. In my microcontroller I have 2000 sample data and my primary target is to read those data. Now I can read those data in hyper terminal, but when it comes to my application it doesnt show anything.
Private Sub sp1_DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles sp1.DataReceived
sp1.Open()
MsgBox(sp1.ReadExisting())
End Sub
this simple code block should show me the data.But it doesnt.data format coming Microcontroller is in this following formate :
nitialization successful !,1023
Starting sampling process... 1023,1023 1023,1023
0,2 1023,1023 1023,1023 1023,1023 212,686 1023,1023 1023,1023
1,5 1023,1023 1023,1023 1023,1023,659 213,689 1023,1023 1023,1023
now, I dont understand why it doesn't read anything :NB: SP1 has a baudrate of 19200,Databits 8 and no parity,COM1 port. I aisnt sure whether I will be needing a buffer or not
This code was published a few years ago by stanav. I have it reading my Com1 db9 port but having some issues.i have tried adjusting some timeouts, but then, it may just sit there.Jarbled Text - I should be getting results like "SOHEM709US 17946US 1114 US62RST 123456789 201107141703 01 " etc., instead I am getting "3B?B?B?????99?F?F?3B?B?B?CAD?1? ? ?2?8?3?0? ?0?1?6"I/O Error - The I/O Operation has been aborted because of either a thread exit or an application request.
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All these days i used to program in Vb6.0. Now since from last 15 days I have been using Vb2008. In Vb6.0 I used MSCOMM for serial communications. Here in Vb2008 I found Serial port control equivalent to it. I somehow managed to learn how to send data using serial port control and set parameters like baudrate , stopbits , etc. But I' not getting how to get the received data. In VB 6.0 we used to use comEvReceive in OnComm event and used MSCOM1.Input to get the received data. But I'm not getting how to do the same in vb2008.
View 2 RepliesI have written a sketch to an arduino board to send data to the serial port. How can I tell VB to only read from the serial port when data is sent to it? I have been using the timer.tick and tried to sink it with the delay I set in the arduino
View 2 Repliesthe program works fine but there is the possibility of a problem because this error message did pop up.I'm gathering my data bytes in an array --
dim rcvdata(19) as byte
serialport.read (rcvdata,0,20)
serialport.close
(Then decipher the array).But Should I go further with this? Could the error be related to my serialport.read?What if there were NOT 20 bytes read into the array?I think this may be it? I should poll the array for 20 bytes before proceeding?Yes? -- (It's a given and that's standard procedure).No? -- Don't worry, they're going to be there (the read will try again if it has to?) It won't proceed without the 20 bytes?
I have created a laser that can be controlled via the serial port. I've written the code to switch it on/off and it works fine. How do i make it strobe? Here's the code to switch it on, to switch it off is similar (don't ask why it is like this...i think it's the transistor from the circuit board that switches the signal):
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seems to be quite easy but i'm stuck I'm reading a hex string from serial port (f.e. 20FD05C4), but can't read it proper in VS:/ . I've been trying with serialPort.ReadExisting(), serialPort.Read, etc
Is there any way to just read that String or convert it easyly bin/hex ?
I've set up two computers, with a null modem serial cable. When trying the connection in two Realterm windows it works ok to send strings.I'm trying to write a simple project that sends the timestring over the same port.One button sends the timestring. I've created one other sub "AppendLabel" that just updates a label.text so I can see what's happening.[code]
View 8 Repliesi have the following code which runs ok, but it hogs upto 95% of the CPU.program outline: a timer tick event = 1000ms scans through 30 readlines of data on the comport for a specific line of hex, and then extracts information from the next line and converts it to decimal for viewing on the screen.i've only included the main part of the code to try and keep it simple.
Public Class Form1
Private WithEvents serial As New IO.Ports.SerialPort
Public grab As String
Public cardIndex As Integer
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Till drawer, connected to Com1, 9600,0,N,1 and a windows forms appThe drawer uses the RI line to show if the drawer is open or closed, but I cant find a way to read this line from the SerialPort control.. Been working on this for a while, but no dice!
View 4 RepliesI have an application in Electronics to communicate with serial port. With using VB I have succesfully read a character using
Serialport1.ReadByte
or
Serialport1.ReadChar
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In my serial port application, I have my code -
Private Sub SerialPort_DataReceived(ByVal sender As System.Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort.DataReceived
Dim cnt2 As Byte
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For some packets I sent, "Error Data Received" came up. I checked BytesReceived, it was 0. My question is: since SerialPort_DataReceived processes data received, data was supposed to be received. Why the number of bytes I read was zero? BTW, when is this event accessed? it is accessed when any number of bytes received or the whole packet received?
I have a stand alone VB.Net 2005 application that uses a serial port that generally stays open while the application runs on a Windows XP system. In trying to bullet-proof the UI, I ran into a problem when the USB to Serial Converter normally used to provide the serial port is disconnected while the serial port is open. In trying to handle the resulting error when accessing the port, I find I cannot close the port.
When trying to do so, the error message says something like "unable to close the port. You may not have sufficient permissions." Reconnecting the USB/Serial Converter does not reactivate the port.
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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 a Windows form.in windows form have a combo box that give me a list of available port serial with it code (Dim ports As String() =SerialPort.GetPortNames())for example( Com1,Com8,Com15,...).but I want to give me fullname of serial port in device manager for example in dvice manager is these (Comunication Port(COM1) - Printer Port(LPT1) And USB Serial Port(COM8)).how to Get it?
View 2 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 Repliesreading and writing data to a serial port. the settings for the port are correct (from manual of device):
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"The operation is timed out " in use with timer and reading serial buffer.I read every 50msec (timer) serial buffer and when are not data in serial buffer, then VB2008 write "The operation is timed out" and program stopped.When are data in serial buffer, then is all OK.PLEASE what can I do, when I want NOT stop program, when are not data in serial buffer.I use this code in timer:
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If I uninstall the COM1 and reboot, it works. If I shut down (power off) and restart, I get the message below. If I uninstall then click on Scan for Hardware Changes,The given port name does not start with COM/com or does not resolve to a valid serial port. Parameter name:portName
View 8 RepliesIn Form1 there are a lot of boxes like checkbox, label....I want to show a processing message for opening serial port after program running. So I created Form2 specifically showing "Opening Port...". So in Form1_Load() I used Form2.Show(). However this message showed behind of Form1. I think this was executed before all the other tool boxes loading. So where should I put Form2.Show()?
View 2 Repliesi have downloaded TCP program and try
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what is the right IP or Port must i used? between client and server
Can anyone tell me how to make a serial data base that my application can connect to?
View 9 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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