Thanks for all that information.

I'm looking at writing code for sensor testing now -- and the same code may be used again, with modifications, for another project a little further along. I unfortunately don't know a lot of details about what's actually going to be used in each case, but I'm trying to familiarize myself with the most likely technologies (based on what I know so far), maybe write some code as I wait for more information to arrive, before I actually have to do the work.

Anyway . . . you've given me some things to think about. I appreciate the help.