put your flame suit on. There isn't really such a thing. There are some variables like what control system you are using? What gear are you are trying to control? Lots of the a/v manufacturers use the same protocol for serial as they do TCP/IP. Sending the information usually isn't that hard (depending on your program environment). It's creating the string to send which is dependent on the manufactures protocol and their willingness to document and share in a reasonable manner.