Installed by tired, old electrician friend who had mounted four of "these" for me eight years ago and, as then, left the programming to this old, tired grandfather - who is competent with electronics and computers (time shared and wrote code in 1960s). BUT no programming instructions in box...

I've seen similar threads, but it seems each configuration is unique. I am trying to replace an old digital switch with a new one. The switch controls outside lights, and was originally controlled by a second switch in the garage, in addition to the inside switch which is being replaced. When...