On Wed, Oct 12, 2011 at 11:11 AM, Joe Wronski w= rote: > I'm curious, why is encryption an issue? Who, within 400 ft of your > garage, and with the receiver to read the signals, would care about the > state of the door? > As for interference, low data volume and low update frequency stuff like > this spends very little time on the air. You could send one or more > 10 mS burst at some fairly large interval (minutes) and be reasonably up > to date with the door. That shouldn't be a problem unless it > interferes with something that is data critical. > There are many things in life that one can get away with, with a very low probability of consequences. But I am a man of principles. Yes, I can get away with a $10 pair of unreliable radio modules without encryption, which will block those frequencies/receive interference, but I choose not to. I always leave room for expansion. Looks like I'll need to stick with xbee modules and probably a wide temperature PIC 18. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .