Frédéric_Plante:
Well, when i got my tlg module I made it work on my mega 256 using the physical serial port 1. I have notice that for some reason, it does not work very well with the serial software library. But using the physical serial port, it work as a charm. I got it to turn relay on anf off no problem.
Sorry, which was the serial port you finally used?
It is good it can control things itself, however I would like to use it for communication only as everything is attached to my 2560 right now. But for info, where are its pins which control stuff itself?