When you "set the simultaneous convert", do you mean you write 1 to the top/simulaneous/temperature?
something like this?: echo 1 > simultaneous/temperature cat 1F.C4DC03000000/aux/28.C4027E010000/temperature cat 1F.C4DC03000000/aux/28.0D337E010000/temperature This doesn't work for me, it is slow. Are you driving the "local" simultaneous files (like 1F.C4DC03000000/aux/simultaneous/temperature) What version of owfs are you using? Do you think I should upgrade? I'm also running a hvac system which currently has period of about 20 seconds. Which is still ok for now. But I'm going to extend it with about 10 more sensors, and I would like it to be more reactive when driving the 4 way valves. What platform are you using? I'm considering upgrading to an low power intel atom (or d510) based PC or maybe dedicating a sheeva plug for the hvac. My current router (asus wl500g deluxe) doesn't have a real time clock so I need the internet at boot time just to get the time for my hvac system to work. Thanks for your help On Wed, Jan 27, 2010 at 6:30 PM, Jerry Scharf <[email protected]> wrote: > Sophana, > > First, I drive my sensors from python through owserver, so a simple > example probably won't help you. I don't think that "on their own > segment" is enough because the sensor can't know that, but this is > beyond my level of knowledge about 1-wire. > > What I do is set the simultaneous convert and then read the sensors > sequentially. The master can only do one thing at at time, so I didn't > see much value in doing any threading for my simple problem. The timing > definitely shows that they are not doing the conversion at read time. > It's easy to compare by just skipping the simultaneous and doing the > sequential read. > > I'm running a HVAC system, so readings every 30 seconds is fine. Not > what I would call a high speed operation. > > hope that helps, > jerry > > Sophana K wrote: >> Hi >> >> I made the tests on powered sensors. >> Some other sensors are not powered but they are "alone" on their own >> hub segments. >> You don't need to write to the simultaneous/temperature file? >> Just do parallel access to owserver? >> Or do you do both? >> Can you give an example of access sequence you are doing? >> Does owfs on top of owserver limit parallel access to the values? >> Should I try directly with threads inside my python program to access >> owserver in parallel? >> >> Thanks >> >> On Wed, Jan 27, 2010 at 5:10 PM, Jerry Scharf >> <[email protected]> wrote: >>> Sophana, >>> >>> I am sure this works. I have a hub (not a switch) and do simultaneous >>> reads for my 30+ temp sensors. Do you have separate power or are you >>> running in parasitic mode. I am fairly certain you can not do >>> simultaneous reads with parasitic power. >>> >>> jerry >>> >>> Sophana K wrote: >>>> On Mon, Jan 11, 2010 at 4:35 PM, Paul Alfille <[email protected]> >>>> wrote: >>>> >>>>> It's easy to do if the segments are on different bus masters. Just read >>>>> in a >>>>> different thread or program since only the bus master is locked. An >>>>> asynchronous read property for temperature is also possible. >>>> I tried this, but it doesn't seem to work. >>>> I made the test through owfs on top of owserver -u with a small script >>>> making simultaneous accesses to different sensors. It is as slow as >>>> reading the sensors sequentialy. >>>> Are you sure about this feature? >>>> >>>> ------------------------------------------------------------------------------ >>>> The Planet: dedicated and managed hosting, cloud storage, colocation >>>> Stay online with enterprise data centers and the best network in the >>>> business >>>> Choose flexible plans and management services without long-term contracts >>>> Personal 24x7 support from experience hosting pros just a phone call away. >>>> http://p.sf.net/sfu/theplanet-com >>>> _______________________________________________ >>>> Owfs-developers mailing list >>>> [email protected] >>>> https://lists.sourceforge.net/lists/listinfo/owfs-developers >>> ------------------------------------------------------------------------------ >>> The Planet: dedicated and managed hosting, cloud storage, colocation >>> Stay online with enterprise data centers and the best network in the >>> business >>> Choose flexible plans and management services without long-term contracts >>> Personal 24x7 support from experience hosting pros just a phone call away. >>> http://p.sf.net/sfu/theplanet-com >>> _______________________________________________ >>> Owfs-developers mailing list >>> [email protected] >>> https://lists.sourceforge.net/lists/listinfo/owfs-developers >>> >> >> ------------------------------------------------------------------------------ >> The Planet: dedicated and managed hosting, cloud storage, colocation >> Stay online with enterprise data centers and the best network in the business >> Choose flexible plans and management services without long-term contracts >> Personal 24x7 support from experience hosting pros just a phone call away. >> http://p.sf.net/sfu/theplanet-com >> _______________________________________________ >> Owfs-developers mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/owfs-developers > > ------------------------------------------------------------------------------ > The Planet: dedicated and managed hosting, cloud storage, colocation > Stay online with enterprise data centers and the best network in the business > Choose flexible plans and management services without long-term contracts > Personal 24x7 support from experience hosting pros just a phone call away. > http://p.sf.net/sfu/theplanet-com > _______________________________________________ > Owfs-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/owfs-developers > ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
