On 10/12/2011 4:10 PM, V G wrote: > On Wed, Oct 12, 2011 at 11:11 AM, Joe Wronski= wrote: > >> 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. I don't know if that is a condemnation of the policies of the regulatory=20 agencies we adhered to, or a proclamation of wanting a higher standard. Joe W --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .