Thanks - both replies very helpful. For doing a simple dedicated wifi network, the WiFly option seems excellent.
In my application, I'd rather have a wired interface to an existing lan, as I'd like to be able to connect to a wireless router and have both wan inernet access and access to the nmea data. The RPi will be a better fit for me in this application. I'm sure this will consume more power than the WiFly, but the other benefit is that I get an always on low power linux
PC to use for 'free'. Details on the RPi implementation very much appreciated!
Thinking more about the WiFly, I was assuming you used it in ad-hoc? Or did you associate it with a wireless router and then connect your iPad
to that? That solution would solve my problem of having internet
access and nmea data....
Either way, I have not yet purchased the wind
indicators yet, so not sure of their voltage levels, but assuming single
ended. Great discussion, though, should be able to save some folks some $$ with these other options.