My pleasure Carol, least I can do after all your help!

Hey, I'm researching 1-wire based weather instruments. I am considering using some of the 1-wire based sensors to monitor temp / humidity in my dome. (1-wire is a serial based protocol where data / power all travel over the same wire.) One advantage of this design is that it's *exceedingly* modular.

Want to add extra sensors? Just plug 'em in and configure your software to read them. Want a lightning sensor? Yep, install it, plug in, and go. You could conceivably build an observatory automation out of this stuff - there are quite a lot of sensors that use this bus.

Some links:
Texas Weather Instruments - look at the 1-wire station

Build your own weather station with stuff from hobby boards

Sensors from iButtonLink