What I am defining as 'correct' pressure is the barometer value that matches the local reading from the National Weather Service (NWS) for my area. In other words, the pressure on my weather station (LaCrosse WS-2813U-IT) matches what the NWS is reporting as Barometer ( https://forecast.weather.gov/MapClick.php?lat=47.715130000000045&lon=-116.94667999999996#.XkdkXDFKiUk). It is possible that I am mis-using the terms barometer, altimeter, and pressure.
Ultimately, I just want the value reported by my WS-2813 to be reported to WU. If I understand your question correctly, my station outputs the manually adjusted pressure in the loop records. For example, my station is reporting 30.06 and the Loop record is reporting 30.05857 *right now* (see attachment). On Friday, February 14, 2020 at 9:22:17 AM UTC-8, Andrew Milner wrote: > > I would expect you to be reporting barometer = sea level pressure which is > pressure adjusted for temperature and altitude because weather stations > always report sea level pressures. > > Is what you call 'correct' pressure the raw pressure of the instrument or > a pressure which you have set. Does the station output the raw pressure or > the manually adjusted pressure in the loop records? > > > > On Friday, 14 February 2020 18:07:15 UTC+2, Dan Blanchard wrote: >> >> Andrew, that's a good questions; let me clarify. >> >> This issue started when Weather Underground (WU) stopped showing my >> station on the maps. I found out that was because I was reporting an >> incorrect barometric 'pressure.' As I dug into the details I found that my >> *station >> *was displaying the correct pressure (29.xx) but by the time it got to >> WU, it was displaying the barometer reading (32.xx) from weewx. This can >> also be demonstrated by looking at the data displayed at >> /var/www/html/weewx/index.html >> (see attachment) so I assume that weewx is taking the pressure from my >> station and somehow converting it or exchanging it for barometric pressure >> before it gets uploaded to WU. I just want the pressure from my unit to be >> what is reported to WU. >> >> Side note: I've been running this station for many years on a Windows >> based system and it has been working fine. So I know the hardware side is >> working; just something different about how weewx reports pressure (or >> barometer, or altimiter). >> >> Does that help clarify my issue? >> >> On Friday, February 14, 2020 at 2:24:31 AM UTC-8, Andrew Milner wrote: >>> >>> I am not sure I understand what you think is wrong with the readings of >>> Pressure 29.89 >>> Barometer 32.609 >>> Altimeter 32.40 >>> and why you believe something is wrong >>> >>> >>> On Friday, 14 February 2020 05:57:36 UTC+2, Dan Blanchard wrote: >>>> >>>> Altitude is 2,320 ft. and the values are in the screen shot on the >>>> previous post. Did you see that? >>>> >>>> On Thursday, February 13, 2020 at 7:16:11 PM UTC-8, Andrew Milner wrote: >>>>> >>>>> I give up - looks correct to me. >>>>> >>>>> have you run from the command line and seen the LOOP and REC data >>>>> weewx is receiving? >>>>> >>>>> what altitude is your station, and what values are you currently >>>>> getting for pressure, barometer and altimeter? >>>>> >>>>> On Thursday, 13 February 2020 22:10:08 UTC+2, Dan Blanchard wrote: >>>>>> >>>>>> I don't know, but that makes sense so I did it. I'm still not >>>>>> getting desired results though. >>>>>> >>>>>> On Thursday, February 13, 2020 at 9:38:55 AM UTC-8, Kevin Davis wrote: >>>>>>> >>>>>>> Do you need a space between your minus sign and the adjustment >>>>>>> value? >>>>>>> >>>>>>> On Thu, Feb 13, 2020 at 9:32 AM Dan Blanchard <dan.z...@gmail.com> >>>>>>> wrote: >>>>>>> >>>>>>>> Hey Andrew, will you please look at the attached screen shots and >>>>>>>> let me know if this looks correct? >>>>>>>> >>>>>>>> Do I need to restart (sudo /etc/init.d/weewx restart) after I make >>>>>>>> these changes? I have and the changes don't seem to be taking effect. >>>>>>>> Is >>>>>>>> there something else I need to do? >>>>>>>> >>>>>>>> With regard to the barometer and altimeter having the same >>>>>>>> settings; I have probably misled. They are not exactly the same but >>>>>>>> they >>>>>>>> were relatively close to each other compared to the pressure value. >>>>>>>> Here >>>>>>>> are the current readings as of now when I run sudo weewxd >>>>>>>> /etc/weewx/weewx.conf. >>>>>>>> >>>>>>>> pressure: 29.98 >>>>>>>> altimeter: 32.57 >>>>>>>> barometer: 32.74 >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> On Thursday, February 13, 2020 at 12:07:50 AM UTC-8, Andrew Milner >>>>>>>> wrote: >>>>>>>>> >>>>>>>>> If you have a LaCrosse WS28xx station then according to the >>>>>>>>> hardware guide the station outputs PRESSURE in weewx terminology - >>>>>>>>> regardless of what LaCrosse call it - and weewx should calculate >>>>>>>>> barometer >>>>>>>>> and altimeter settings. >>>>>>>>> >>>>>>>>> If pressure is incorrect then it can be adjusted as you specified >>>>>>>>> - by adjusting pressure (not barometer or altimeter) >>>>>>>>> >>>>>>>>> Make sure pressure is set to use hardware and barometer and >>>>>>>>> altimeter are set to use software. >>>>>>>>> >>>>>>>>> I am surprised barometer and altimeter are the same values - have >>>>>>>>> you set the station's altitude in weewx.conf, and have you specified >>>>>>>>> software generation for the values? >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> On Thursday, 13 February 2020 09:23:27 UTC+2, Dan Blanchard wrote: >>>>>>>>>> >>>>>>>>>> Andrew, are you suggesting that I make a 'correction' entry under >>>>>>>>>> [StdCalibrate] such as barometer = barometer -2.8 assuming that I >>>>>>>>>> am >>>>>>>>>> getting a pressure reading of 30.13 and Barometer and ALtitude >>>>>>>>>> readings of >>>>>>>>>> 32.93? >>>>>>>>>> >>>>>>>>>> (see attached screenshot) >>>>>>>>>> >>>>>>>>>> On Wednesday, February 12, 2020 at 7:42:08 PM UTC-8, Andrew >>>>>>>>>> Milner wrote: >>>>>>>>>>> >>>>>>>>>>> 1. use stdcalibrate section of weewx.conf >>>>>>>>>>> http://weewx.com/docs/usersguide.htm#StdCalibrate >>>>>>>>>>> 2. FO station = Fine Offset weather station >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> On Wednesday, 12 February 2020 22:15:48 UTC+2, Dan Blanchard >>>>>>>>>>> wrote: >>>>>>>>>>>> >>>>>>>>>>>> Andrew, how do I calibrate the pressure in weewx? Also, what's >>>>>>>>>>>> a FO station? >>>>>>>>>>>> >>>>>>>>>>>> On Tuesday, February 11, 2020 at 8:01:08 PM UTC-8, Andrew >>>>>>>>>>>> Milner wrote: >>>>>>>>>>>>> >>>>>>>>>>>>> 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. >>>>>>>>>>>>> >>>>>>>>>>>> -- >>>>>>>> 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...@googlegroups.com. >>>>>>>> To view this discussion on the web visit >>>>>>>> https://groups.google.com/d/msgid/weewx-user/08c79655-b1af-4134-9a2b-82a4f52f051f%40googlegroups.com >>>>>>>> >>>>>>>> <https://groups.google.com/d/msgid/weewx-user/08c79655-b1af-4134-9a2b-82a4f52f051f%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>>>> . >>>>>>>> >>>>>>> -- You received this message because you are subscribed to the Google Groups "weewx-user" group. 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