mshokry:
It's A project I'm working on
It's a personal meter used to control compound like light
Now your posting begins to make sense. How old is the device? Why can't you get documentation from the company that made it, or whoever installed it? Is your meter the only one in the area? Who maintains the light system? Is it you?
Oh, and where did you get the message to send to the meter to get what you got?
Paul