I just got a request to link stuff up by radio link and was wondering if anyone had first-hand experience with any add-on radio modules that do that kind of thing for you.
Basically the need is for low data rate communication - even 300 baud is plenty - that will work inside a building, through at least one concrete floor, and go about 600 feet.
Thoughts? Caveats? Things to watch out for? (the more subtle stuff - I think I have the obvious covered... or so I hope)
I have never done the radio link stuff so would like to stack the deck as far in my favor as I can.
Thanks in advance...