Serial Ports
Hi all,
Is there a way to get a list of the available open serial ports ( without using the mscomm control). Specifically I am trying to determine which ports have a bluetooth device associated with it. Any help would be greatly appreaciated.
Thanks!
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I know it can be done I just dont know how!!
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heya gang...
I have been trying to access certain ports on my pc...com1 and ltp1 is there even a way to this in vb?? If so, how do i send and recieve data to these things?
Thx eh
Elon
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I am trying to write a program that will open a serial port. Then the user can type a message and push send and the program will serve as a network protocol, sending the information to another computer that the serial port is connected to.
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howdy,, i'm workin on a little project readin some serial data from an IR device,, what i need to know is a good way to get +5v outta a pin on the serial port,, anyhelp you got is great! (i relize this isn't much of a vb question, but i am using vb for the coding =) ) thanks for any help,,
Controlling USB Serial Ports
Hello,
I've created an application in which I've utilized the MSComm contorl
to allow access to the serial ports. Unfortunately my customer would like
to use USB Serial ports. I've found in Microsofts stuff that MSComm does not support USB Serial Ports.
Does anyone know how to control USB serial ports in VB 6.0.
Thanks in advance for any assistance.
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Suppose your PC has 2 serial ports: COM1, COM2. Suppose you need to let your program user see a COM3 which you want to redirect (e.g. you want to send the output strings of this virtual COM3 through the Ethernet card and to to read in the COM3 receive buffer what is coming from the Ethernet card). Does anyone know how to provide such an "illusion" (COM3 does not physically exist but a serial communication program can use it)???
Thanks in advance!
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Has anybody used COM ports, MSComm1, and detecting serial ports????
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I have also tried openeing them with MSComm1 and catching the error if it is already oppened. My end result was 1, and 2 are not used and 3 and 4 are being used. The unusual thing is when I send 2 bytes to port 2 I get two bytes back in my input buffer.I only have COM1 in device manager though. COM1 works fine.
Basically I am trying to find an INI file or someway to find out what COM ports are availlable on a computer. Any ideas?
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Hi Guy's
I need to include a means of creating virtual serial ports in my program.
A realy good example is the program "Virtual Serial Ports Kit". (here)
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as if you had 2 real serial ports bridged with a serial cable.
Is there a free ActiveX or .dll that can do this ?
Thanks
Oly
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Hello !!
I need to show in the combo box all serial ports and modems installed in the PC... I see HKEY_LOCAL_MACHINEHARDWAREDEVICEMAPSERIALCOMM in the windows registers but ... How i can to get that information with VB? Any Clue?
Thanks for your help and your time!!
woman in love
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MSComm And Bluetooth Serial Ports
Hi,
I'm working on a VB6 app. that uses the MSComm contro to connect to a Bluetooth serial port. Hower, when I attempt to open the port using COM 17 or 18 (the automatically assigned port number from the BT hardware), the control returns an error of "Invalid Port Number".
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hi
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Hey guys!
Plz, anyone know if this 2 things are possible to do with VB....
I need to do some stuff for a client and I will need do something like it...
1- Vb can send/receive information trought serial port as com 1,com 2 or usb... etc.. any port? =-)
2- Theres a way to put 2 or more files (any kind) in one? Like Can you create a proccess that gets 2 exe and put in a file with a new extension and them make the opposite.. Get this one file, and extract both exe from it?
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Access Control & Serial Ports
I do hope this type of request has not been posted in the past but if so, I apologize.
I have developed a security access control keypad. The keypad memory will store the last 100 transactions through the keypad. A small hand held printer (Seiko) can be connected to my keypad's controller to enable the printing of these transactions (Audit Trail). As the software for the keypad was written by my pc board manufacturer, I am told the ASCII characters in the keypad memory could instead be uploaded to a pc hard drive and printed to a txt file. My keypad's controller connects to the hand held printer via a 9 pin serial cable.
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Regards and happy coding
Paul
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I like very much this subject and i am already reading some guides, the problem is, the xplanations always assume so much sttuff and it is definetely not sth easy to swallow... i was thinkng... YOU the people who actually work with this sttuff in their daily routine, do you use special controls or dll components with VB to access ports and so on or you go all by yourselves... also, IF SO, (i suppose) what controls are preffered and how much do i need to know to use it (just the basics)
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Opening serial ports using the MSComm control takes around .5 seconds. Closing the port also takes around the same time.
I have a program that needs to open 2 ports, print something, and then close both port before starting the program.
So far I have just disabled the main form and had a timer take care of it, and reenabling the main form, but I don't feel this is a good solution.
Is there a better way to handle serial communications?
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Hi,
Actually i have to set serial ports greater than 16 for communication.
for that i used
There was a hack that came around about modifying the MsComm control to
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"In the code there is a unique sequence of three bytes, 3d 10 00. Pick a hex
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give me other ways also for setting up communication with the higher ports
Problem Of Data Sending Using Two Serial Com Ports</title>
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Hi everyone,
Im facing some problem in data sending using two serial com port(RS232).
here is my VB code,
Code:
Private Sub MSComm1_OnComm()
Dim bytToSend1(0) As Byte
Dim strData As String
Select Case MSComm1.CommEvent
Case comEvReceive
'
' The Pic has sent us something notification to allow next data'
'
If boFinished = False Then
strData = MSComm1.Input
'
' Send the next byte
' and increment the next byte pointer
'
bytToSend1(0) = send_L(intNextByte1)
MSComm1.Output = bytToSend1()
intNextByte1 = intNextByte1 + 1
'
' When we've sent 10 bytes we've finished
' so set the finished flag
'
If (intNextByte1 = 10) Then
boFinished = True
MsgBox "All data1 has been sent"
intNextByte1 = 0
boFinished = False
End If
End If
End Select
End Sub
Private Sub MSComm2_OnComm()
Dim bytToSend2(0) As Byte
Dim strData2 As String
Select Case MSComm2.CommEvent
Case comEvReceive
'
' The Pic has sent us something notification to allow next data'
'
If boFinished2 = False Then
strData2 = MSComm2.Input
'
' Send the next byte
' and increment the next byte pointer
'
bytToSend2(0) = send_R(intNextByte2)
MSComm2.Output = bytToSend2()
intNextByte2 = intNextByte2 + 1
'
' When we've sent 10 bytes we've finished
' so set the finished flag
'
If (intNextByte2 = 10) Then
boFinished2 = True
MsgBox "All data2 has been sent"
intNextByte2 = 0
boFinished2 = False
End If
End If
End Select
End Sub
Im using two com ports in the serial communication which connect to two independent PIC circuits.
im have ten pair of data (send_L() and send_R() which are in one byte each) that need to send out to two of my PIC circuits. lets say that, data of send_L() is for PIC circuit 1 and data of send_R() is for PIC circuit 2.
the first pair of data is send out automatically and after my PIC have finished process the first data, it will send a notification to VB to allow the next data come in.
my problem is, this code is sending data independently to each of the PIC without synchronize with the other.
the first pair is working fine but when it come to the next data,VB send the
data whenever which of the PIC send the notification 1st (because the time for the data to process in PIC is different), so this cause the data that send out is not synchronize with the other.
Can i make my VB to send the data in pair, in other word VB will send out the next pair of data when VB receive two notification from each of the PIC.
can anyone help me? what should i write in the VB code? thanks.
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Hi every one
Is there any way when scanning ports on my computer is there any way to see what the ports are being used by i.e application and other stuff like that.
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I keep making my chat network program. Now I've got a (simple?) question. Is ANY port valid for sending/receiving data with WinSock or are there restrictions with them? How many ports are available?
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Hi:
is there any way i can determinate wich ports (numbers, for example com1, com2...) are available in the PC?
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hi i would like to make a program that will allow me to open a port while i use a certain program then close it when i stop using it i have had to close the port because i kept getting backdoor sub7 comeing thru so i dont want the hassle of opening it then going in and closing it after that. so possibly a program that would load on the form load event and when you close the app in closes the port again if you need the port number i will have to check my logs tonight.
-Thanks For reading
PORTS PORTS PORTS!!! Come One Come All
Yo, i got a quick question it may be simple it may not be. Anywayz how exactly would i go about making a port monitor ?
well thats everything told u itd be quick.
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how can i control ports, so lets say i wanted to eceive a file through port 4900 or something? How would i do that?
Thanks alot
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Ports
Hi,
I'm running my home computer on a network of about 6 computers. I was just curious, am I able to block the ports so that I can not send nor recieve type of deal. So basically I believe I am looking for a way to close the ports, I fairly new to this stuff.
Is there a way to turn off all of them, or select ones etc.
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TCP Ports
Well, I'd like to monitor TCP Port connections (kinda firewall).
If a use a Winsock control (or WSAPis...) I can set a socket in listen state, and I can handle the connection request. But I'd create an array of 65536 WinSocks to control All the ports, and this could block all other apps... since no more ports left free...
Then I though the right question was:
what does the system do when someone tries to connect to a certain port and no application is listening on that port? We could hook there and see...
But another solution would be monitoring when an application sets listen state for a port, since no connection from outside will happen on a certain port if it is not listening...
then for example, if I execute an app that will listen on port 23000 my program should warn me that AppName is listening on that port, and eventually allow me to deny... this should be the working structure of most common firewalls... if I'm not wrong (which happens pretty often) .
Any Idea how to do this in vb?
If you got any Idea of how to do it in C++ / VC++ ecc ecc... then please reply anyway (a link is more than enough).
Overflow - Too many fingers on the keyboard.
Get Available Com Ports
Hi there
i need to get a list of all available com ports.
ive seen that there already exist 2 threads about this but
one also get out other ports like LPT's and so on and the other
just read like 16 ports but i think there could be much more.
Is there an API function that handles that or does anybody have
any other ideas to solve this??
thx
Getting PCI And AGP Ports
Right people
I am currently getting system information using WMI, i need to be able to get how many PCI, AGP and PCI-exoress ports the user has, does anyone know how to do this?
I have asked before, but with no response, dont let me down VBF
ILMV
Ports!!!
When I first posted a thread like this one months ago, it caused bad arguments. First, I am sorry for being so childish in my first thread about ports. Then I want to ask those questions again with a few different ones:
1. I suspect(no, I know) my MSN Messenger has been hacked. I can still login to gmail and passport.net but I can not log in to MSN Messenger. I'd like to know if somebody can use TFTP and MSN Messenger(he didn't even talked to me in MSN) to hack my MSN Messenger?
2.If so, are there certain ports TFTP use? Can they be detected and listened(code of freeware please...)? Can I refuse incoming data from the listened ports(code or freeware please...)?
3.My father told me MSN Messenger would have caused some security problems.
4.I don't want to use ZoneAlarm(it would interrupt me too much).
5.Can somebody teach me how this port stuff works?
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