Hi! I'm Alberto from Mexico. Can you tell me more about your poject? Sounds very interesting. I alredy have a raspberry with me and some usb to serial devices that I can use to develop all the software and test it. So the versions I'll send will be working versions.
About me, I have done several projects using raspberry pi, and other electronic/software projects, I'm in fact a graduated Electronics Engineer.
I really hope to talk more about the project with you.
Regards.