TCP/IP communications.

[Andy_P]

I have a VB.NET project that uses serial comms to communicate with some equipment made by my company. It is a simple point-to-point link using RS-232, not RS-485 or anything like that. It means that the PC connected to the equipment is no more than a few feet away.

I would like to upgrade this so I can use a different communication method that allows a remote PC to be attached. Does TCP/IP sound like a good candidate? Unfortunately, I have no clue where to start as I have no experience with this. From what I have read, TCP Clients and TCP Listeners seem to fit the bill.
My intention is to use VB2005 or C#2005.

In my serial comms app, I send a command of a few bytes to the equipment, and it responds with anything up to 800 bytes or so. I need to respond to the comm events and build up a byte array, and then present the array to the rest of the app when it is complete.

A few questions:
How does TCP work - will I receive data in one go, or will it arrive chunk by chunk, as per serial comms?
Is there a fixed packet size?
If a transmission error occurs, and retransmission is required, does TCP handle this itself?

I'm sure I will have more questions in the future.


All comments and advice welcome.

Thanks!

[Maxim]

http://www.vbforums.com/showthread.php?t=478000

read it, try it

you ll learn it

[rack]

Here is information on my newest versions, and errors.

So if you wanna play with the code, its there. THe part thats not working is to do with the file sending. Messages work.

http://www.vbforums.com/showthread.php?t=481315