Am 27.09.2013 10:04, schrieb Mick Sulley:
>
> My network has a HobbyBoards 6 port hub and I have never got it to work
> through that, don't know why.
>
simultaneous/temperature and simultaneous/voltage use the "Skip ROM"
command which addresses all chips on a bus segment simultaenously. After
that, a command code "Convert T" or "Convert V" ist sent, which is
ignored by all chips on the bus besides the temperature sensors /
DS2450. That's how it's works.
When you use a DS2409 driven hub, the important caveat is owfs is
disabling all main/aux branch branches before doing any transaction. So
if you use the /simultaneous directory, the command will only be sent to
the chips *before* the first DS2409.
However, there is a way to use simultaneous with the hubs, too. There is
a main/simultaneous and an aux/simultaneous directory in any DS2409
node. When you use that, the "Skip ROM" command is sent for that path only.
Kind regards
Jan
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