Hello,

        I'm trying to do a network where i have a master and a lot of
slaves, the slaves must monitor their inputs for impulses and when the
master asks, they must send information about the impulses. I've been
looking for some network schem but until now i've not decided, what i
really want (and i think i found it) ist's a way to send data and power to
the slaves width fewer cables. It's a protocol called M-Bus, have someone
done something like this (or width any other protocol) ?

Thanks.