Question

Sending ASCII strings to an IP device in VB.net 2003 aspx web application

Asked by: hagoog

I have an IP device on the network that I need to make a web app for.  The web app needs to send ascii text strings to the IP address of the device.   This device has RS232 and IR ports on it to control electronics.  When the right ascii code is sent to the device via IP it then relays the rs232 or IR to accomplish the goal of the command.  I need only to send ascii messages to the ip address according to the API into in the code window.

In the code window I am putting the documentation that have on the API

I need to be able to send the strings on button clicks etc in the web app and allow parameters of the string to be built dynamically.

The part I need to understand is how is an ascii string sent to an ip address
What code is needed to do this?
Thanks!

Communication with the GC-100 is accomplished by opening a TCP socket on Port 4998. All commands and data, with the exception of serial (RS232) data, are communicated through Port 4998. Port 4998 is used for such things as GC-100 status, IR data, relay activation, and reading digital input states. All information, with the exception of serial data, is communicated by comma delimited ACSII text strings terminated by a carriage return (µ).
Serial data is communicated over Ports 4999 and higher. Serial connections with the lowest module number will communicate over Port 4999; serial connections with the next higher module number will communicate over Port 5000; and so on.
 
Commands are always initiated by short ASCII string representing the command type. Typically, address and data information will follow. The structures of GC-100 commands are described in the following sections. Text enclosed in brackets ( <text> ) must be substituted by its ASCII definition. Multiple ASCII choices are divided by separator ( | ) characters. Note: commands are case sensitive.
For example, a relay state is set to ON by the following command:
setstate,<connectoraddress>,<state>µ
where;
<connectoraddress> is 3:2 (3rd module, 2nd relay in module)
<state> is 1 (close contacts on a normally open relay)
For this example the command ASCII string is,
setstate,3:2,1µ

                                  
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Asked On
2009-10-05 at 13:17:54ID24786880
Tags

VB.net 2003

Topics

.NET Framework 1.x

,

Programming for ASP.NET

,

Microsoft Visual Basic.Net

Participating Experts
1
Points
500
Comments
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Answers

 

by: BirkyPosted on 2009-10-05 at 16:04:09ID: 25500671

Hi,

I have a couple of little vb programs that will do part of this at home (One sends strings or commands to an IP address and the other talks to the Parrellel port . I'll see if I can find them and post them.

Maybe it will get you started.

 

by: hagoogPosted on 2009-10-05 at 18:31:20ID: 25501255

That sound good. Are they vb.net 2003?

 

by: BirkyPosted on 2009-10-06 at 22:45:46ID: 25512487

Hi,

Sorry about the late reply. My server and I had a disagreement about getting the files. Check out http://www.lvr.com/parport.htm#Programming for info on parrellel port programming. I have attached some really old code of mine for Communicating via IP and port. Lookup System.Net.Sockets if you need more .

Hopefully this will get you going

 

by: hagoogPosted on 2009-10-10 at 10:56:12ID: 25543084

Hey this looks promising.  What version of vb.net is it?  2003?  


It sends a string.  What if I need to send an ascii text file instead of a string?  How would I modify this?

Thanks!

 

by: BirkyPosted on 2009-10-11 at 16:15:18ID: 25547819

Hi,

I think it is VB 2003. I now use VS 2005 and I have to upconvert to that so I am assuming so.

The easiest way might be to open the file and read it into a string, or series of strings, and send it that way. That was how I was going to do a similar task anyway. I think you can send a binary file in much the same way.

Hope this helps

FileOpen(1, "FileName", OpenMode.Input) 'opens file for reading
Line1 = LineInput(1)
Line2 = LineInput(1)
Line3 = LineInput(1)
FileClose(1) 'Closes File

                                              
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