serial to TCP address port proxy

A project I am working on has a relatively simple requirement. I need to send “fixed” size data over tcp to a desired port. What I am looking for is the basic tcp client software which comes with the Digi Connect ME so I can modify it accordingly. Is this available? Has anyone else done this? I am looking at sending encoded packets via a PC to the connect me. Only when an entire packet is received will the tcp client send out the packet to a server. Any help would be appreciated.