There is a way for slaves to announce their presence on the bus by providing a presence pulse when they are powered up. I'm not sure if all slaves to this or just some (or all) of the iButtons. Also I don't know which masters or software supports this, it is mainly used for things like door lock systems where the iButton is used as the security FOB.
> That's pretty weird. That'd kill any communication initiated by the > master that is taking place when the iButton is powered up. > > Not saying I don't believe you, especially since I have no experience > with these devices, but I'm tempted to order a sample just to further my > knowledge of the protocol (and a possible extension to it like the one > being discussed) ;-) > > Cheers, > > Eloy Paris.- > Yes it is rather strange that they allow it. After this thread started the other day I did a Google search and found a few references in some Maxim documents and they talked about a communication failure because of a presence pulse arriving at the wrong time. Eric ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
