Colin,
Unless the devices are externally powered that won’t work reliably. For
instance a DS19S20 requires a strong pull-up during the entire conversion time
so if you are issuing more Match ROM commands during the conversion time the
bus activity may keep the DS18S20 from completing the conversion successfully.
Eric
> On Jul 10, 2014, at 1:09 PM, Colin Reese <colin.re...@gmail.com> wrote:
>
> Hello,
>
> After talking with iButtonLink, it was brought to my attention that without
> additional power, it is possible to have unsuccessful simultaneous read if
> too many sensors are on the network, due to current draw during the
> conversion.
>
> Using the TMEX API, I can perform a match ROM and then issue a conversion
> command, and then come back later to read the converted value. This way I
> can issue conversion commands for, say, 20 ROMs without waiting for
> conversion more than once.
>
> Is there an analogous feature in owfs, e.g. a 'simultaneous' with a
> specified group of ROMs?
>
> Thanks,
> Colin
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Turn processes into business applications with Bonita BPM Community Edition
Quickly connect people, data, and systems into organized workflows
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http://p.sf.net/sfu/Bonitasoft
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