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 [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
