Thank's a lot I'm learning a lot of things with you Le sam. 21 nov. 2020 à 18:59, vince <vinceska...@gmail.com> a écrit :
> On Saturday, November 21, 2020 at 9:31:11 AM UTC-8 kk44...@gmail.com > wrote: > >> didier....@gmail.com schrieb am Samstag, 21. November 2020 um 16:09:22 >> UTC+1: >> >>> Ooops, after 10 mn the 2 values have diverged (only 1 mbar) >>> The explanation is that weatherlinkliveudp driver uses "altimeter" and >>> WLLDriver uses "barometer" for the station info >>> >> >> That I do not understand. Does the driver only retrieves the readings >> from the hardware, doesn't it? So, which way the driver can influence which >> values is displayed? >> >> > > There are two pressure-related elements provided by the Davis hardware. > One is the pressure as reported by the sensor, the other is the pressure > corrected to sea-level pressure based on your altitude. The driver code > defines which sensor values it uses for what generic weewx database element > > Both drivers map 'bar_absolute' from the hardware to weewx 'pressure' in > the database. > > But...the two drivers map 'bar_sea_level' from the hardware to different > elements in weewx's database. > > - WLLDriver.py puts the value into 'barometer' in weewx > - weatherlinkliveudp.py puts the value into 'altimeter' in weewx > > According to > https://github.com/weewx/weewx/wiki/Barometer,-pressure,-and-altimeter, > the correction math differs slightly, so I'd expect slight differences > perhaps. A difference of 1 mbar to me isn't something to worry too much. > You're talking 0.1 percent offset. The sensor itself isn't that precise to > begin with. > > > -- > You received this message because you are subscribed to the Google Groups > "weewx-user" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to weewx-user+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/weewx-user/fccfe641-03d1-473f-910a-c1f0d7aa2cabn%40googlegroups.com > <https://groups.google.com/d/msgid/weewx-user/fccfe641-03d1-473f-910a-c1f0d7aa2cabn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- Quel temps fait-il à Auffargis <https://meteo-auffargis.decoodt.eu> ? -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/CAAvt3%3DT8-1AxFjbNMCtRSR89uXSO4TEM2Bc8RZStL8zk2E4Vvg%40mail.gmail.com.
