I'll keep looking, I was surprised there was a green dot one that doesn't seem to do anything. The fact that I actually have three of them that all do the same nothing seems to indicate I'm probably not looking in the right place for their function. I just don't see any activity regardless of what serial commands come in.
I am only aware of the two functions for these boards, the ditch lights for diesels and the tender IR link and light/coupler function for steam.
