> > That's something I was thinking of as well, I'm not > sure how they > > do it. > >Perhaps there is some polling going on? Or maybe every device > transmits at a > >random time? Anybody here know how they manage to do it? TTYL > > If you've used one-wire devices- it doesn't have to be random if they all > have a serial number. I haven't used one wire devices, I don't see how having serial numbers help. Remember, the scanner doesn't KNOW what devices are out there, and the devices don't know what devices are out there, I can't see the scanner querying every single number, that would simply take too long. There has to be some "discovery" mode, and I don't really see a way other then a random "hello", but then I'm not very experienced in this sort of thing, which is why I'm asking. TTYL -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.