My sensors are powered, the temperature sensors are a mix of DS18B20 and DS18S20, I just used DS1820 as a generic term.
Is there a way to use simultaneous conversion with pyowfs? Thanks Mick On Sat, 2011-02-05 at 02:00 +0100, patyrk wrote: > Dnia 2011-02-04, pią o godzinie 22:44 +0000, Mick Sulley pisze: > > Hi, > > > > I am using pyowfs to read 20 DS1820 temperature sensors and 6 DS2406 I/O > > AFAIK if you're using parasite power reading temperature will take this > long. The transfer does not take as much but the conversion(preparing > the data in ds1820) takes time. I have some ds18b20 and the reading > takes about a second each. > I think but I'm not sure that using external power and sending > conversion signal to all ds18b20 will shorten the reading time because > the conversion will takie place simultaneously. > > And here's a question I would like to ask. Why isn't possible to use > simultaneous/temperature with parasite power? I it because after reading > the first ds18b20 and therefore pulling the line low others will loose > power? > > > Another idea is to use fasttemp, ds18b20 has this feature of different > resolution. Check the data sheet for details. But you wrote that you are > using ds1820 and it's an older design. > > P4trykx > > > > > ------------------------------------------------------------------------------ > The modern datacenter depends on network connectivity to access resources > and provide services. The best practices for maximizing a physical server's > connectivity to a physical network are well understood - see how these > rules translate into the virtual world? > http://p.sf.net/sfu/oracle-sfdevnlfb > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/owfs-developers ------------------------------------------------------------------------------ The modern datacenter depends on network connectivity to access resources and provide services. The best practices for maximizing a physical server's connectivity to a physical network are well understood - see how these rules translate into the virtual world? http://p.sf.net/sfu/oracle-sfdevnlfb _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
