check that the absolute pressure is correct - I have had a FO station which had a dodgy pressure sensor before now. Calibrating pressure in weewx solved it.
On Wednesday, 12 February 2020 03:51:29 UTC+2, gjr80 wrote: > > sudo /etc/init.d/weewx stop will stop the current running service but if > you have other instances running, for example WeeWX directly, sudo > /etc/init.d/weewx > stop will have no effect as WeeWX is not running as a service. When > running WeeWX directly you need to stop the execution using a control key > sequence (CTL-C) or list the running WeeWX processes with ps -aux|grep > weewx and then use the Linux kill command to kill the process. > > Whenever you do a lot of stop-starting, running services/running directly > and odd things (apart from odd pressure values :) ) are happening it can be > because there is more than one instance of WeeWX running. If you look at > the log you can usually see it by there being more than one process ID > number against WeeWX at any one time. > > Well if your relative pressure is set correctly I am out of ideas on how > to fix this. I am not convinced the driver is wrong but I guess it is > possible. Really need someone who understands the driver operation and the > 2813 to take that further. > > Gary > > On Wednesday, 12 February 2020 11:41:16 UTC+10, Dan Blanchard wrote: >> >> The further I go, the more complex it is getting. First, yes I have a >> WS-2813U-IT and yes, I did set the relative pressure to match the local >> weather service. >> >> I don't want to muddy the waters any more, but how is it that I stopped >> the wewx service but it is still reporting? I'm still trying to understand >> this thing. >> >> On Tuesday, February 11, 2020 at 5:04:02 PM UTC-8, gjr80 wrote: >>> >>> On Wednesday, 12 February 2020 10:16:47 UTC+10, Dan Blanchard wrote: >>>> >>>> OK, I shut down via sudo /etc/init.d/weewx stop then I ran sudo weewxd >>>> /etc/weewx/weewx.conf and it is continuing to produce data. I see >>>> that the barometer and altimeter are both the 32.xx readings while >>>> pressure >>>> is the same as what is reading on my station 29.9x. >>>> >>>> Hang on, let's go through this a bit more carefully. So you have run >>> WeeWX directly and are seeing all three WeeWX pressure fields. WeeWX field >>> pressure is matching what is on your console exactly. Fields altitude >>> and barometer are 'in the 32s'. By my rough calculations an absolute >>> pressure of 29.9inHg at 2300ft gives a barometer value of about 32.5. So on >>> the face of it it would appear that the driver is providing data (whether >>> it is right or wrong) in field pressure and WeeWX is calculating fields >>> barometer and altimeter as expected. >>> >>> Can I ge weewx to read the pressure reading in lieu of the barometer >>>> altimeter reading that it is presumably doing? >>>> >>> >>> Now I don't understand. The 28xx driver takes the pressure value >>> displayed on the station hardware and feeds that to WeeWX as the WeeWX >>> field named pressure (after which WeeWX calculates fields barometer and >>> altitude). Do you want the driver to instead take that pressure value >>> displayed on the station hardware and feed that to WeeWX as the WeeWX field >>> named barometer (after which WeeWX calculates fields pressure and >>> altitude)? That can be done but it requires modification of the driver >>> code, I would not being doing that lightly, someone did not roll a dice and >>> randomly decide to put the pressure value from the 2813 in field >>> pressure, it was done for a reason. >>> >>> I was looking for a 2813 manual and the only manual I could find was for >>> a WS-2813U-IT weather station. On page 14 it talks about setting a >>> 'Relative value pressure reference setting' based on a value from a weather >>> service, airport etc. Is that your station and have you set that correctly >>> or if not your station is there a similar setting? >>> >>> Gary >>> >> -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/aa1cfede-c5aa-4971-851d-bcc33c144725%40googlegroups.com.
