Am 13.03.20 um 15:12 schrieb hwissing: > Hello, > > I think one issue from the primary question is not answered.. > > /" If I read from '/temperature' then I get them read in much faster > *but I don't get a fresh conversion each time."*/ > This is a very old question, and the mechanism has changed a bit since 2008.
> > I have the same issue. First conversion with 8 DS18B20 sensors takes > about 1 sec, immediately following requests take about 40 ms, but > values are not updated. It takes a while till updated values are > acquired, then conversion takes longer. > That is because you read /<ID>/temperature instead of /uncached/<ID>/temperature But don't do this either. If you want simultaneos conversions, do instead $ owwrite /simultaneous/temperature 1 $ sleep 1s $ owread /uncached/<sensor0id>/latesttemp $ owread /uncached/<sensor1id>/latesttemp $ owread /uncached/<sensor2id>/latesttemp $ owread /uncached/<sensor3id>/latesttemp $ owread /uncached/<sensor4id>/latesttemp $ owread /uncached/<sensor5id>/latesttemp $ owread /uncached/<sensor6id>/latesttemp $ owread /uncached/<sensor7id>/latesttemp Latesttemp has the resolution of the previous non-simultaneous conversion, or, after power-up of the sensor, the resolution set in the sensor's EEPROM. You can adjust the through /<ID>/tempres. See the manpage: https://github.com/owfs/owfs-doc/wiki/DS18B20 Kind regards Jan _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
