li...@lazygranch.com said: > I have one of those key fobs. Does the code somehow inform the power the be > about the drift in the built in clock? Or is the time element of the code so > sloppy that the drift is acceptable?
The magic number changes every second or so. You only have to scan a few seconds either side of the correct time to find a valid match. Every time the server gets a match it can update its memory of the fob time to reduce its searching in the future. You could measure/compute the drift too. I don't know if that's worth the effort. It would probably change with temperature so seasonal or lifestyle changes could throw the prediction way off. [I have no inside knowledge. I could be totally wrong, but that seems reasonable to me. They may have a better approach.] -- These are my opinions. I hate spam. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
