Maybe the Laipac modules will work for you? They're in Toronto. A receiver/transmitter pair is less than $10US. I've used these with success (garage door type application). I'm a bit puzzled why I haven't seen more on this list about these modules. They seem to be a useful item for their low cost. Can anyone comment? G Brigley wrote on 5/11/02 5:04 pm: >Hi, > >I'm designing a network of >devices that uses a shared >wireless medium.... -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics