baromin should always be relative pressure (i.e., adjusted to sea level). absbaromin is absolute (raw) pressure. baromin is the authoritative. absbaromin is not used unless it is the only pressure provided. In that case, absbaromin is used to derive baromin. See https://wow.meteo.be/en/connect-your-station/diy-with-the-wow-be-api/ We have provided comprehensive documentation at https://wow.meteo.be/docs/api/ Please note two important changes with respect to the (legacy) WOW protocol: - Parameter
solarradiation has been added. - Concerning relative and absolute pressure: there was somehow an ambiguity in the (original) WOW protocol as it both accepted relative and absolute pressure in the same parameter
baromin (and the nature of the pressure had to be defined in the station registration). This ambiguity has been resolved in the WOW-BE protocol. It explicitly distinguishes between the two values: baromin always represents relative pressure (i.e. pressure adjusted to sea level), while absbaromin represents absolute pressure (i.e. the raw measurement at the station’s location). The authoritative value is always baromin. If onlyabsbaromin is provided, baromin is derived from it; otherwise, only baromin is used.
I'm having a hard time following. I know the last commit fixed David's station. John: I gather it made yours worse?
Could someone check the WOW-BE API and see exactly what they need. That should be what we do, rather than make stations "better" or "worse".
-tk For me using absbaromin, pressure readings for my station being reported by WOW-BE were consistently looking very wrong. They were approximately +10hPa higher than they should have been. Presumable the MSLP (barometer) being reported were then being (incorrectly) adjusted by WOW-BE to take into consideration the altitude of my weather station (around 105m). As soon as I changed to baromin instead, things looked much better. So far the WOW-BE barometric pressures for my station have been stable with no anomalous readings.
-- David On Sunday, September 21, 2025 at 11:40:08 AM UTC+9:30 John Smith wrote:
hPa even...
Not using absbaromin things go wonky, my station was reporting over 1100kPa at one stage...
Just a query with regards to the updated restx.py file for sending data to WOW-BE. When reporting pressure using "barometer", shouldn't the respective WOW-BE field be "baromin" instead of "absbaromin"? According the the WOW-BE site: "baromin = relative pressure (i.e. pressure reduced to sea level) and absbaromin = absolute pressure (i.e. the raw pressure measurement at the station’s location)." So for reporting pressure: - weewx parameter "barometer" corresponds to the field "baromin" in WOW-BE - weewx parameter "pressure" corresponds to the field "absbaromin" in WOE-BE May be I'm wrong, but since I modified the code to report "barometer" as "baromin" the reported pressure now seems to be correct (before the change they were abnormally high). I have a Davis Vantage Pro 2 so it makes sense for me to report "barometer" pressure since this is what is provided by the weather station.On Tuesday, September 16, 2025 at 9:02:01 PM UTC+9:30 John Smith wrote:
I've submitted a pull request for restx.py to enable sending weather data to both wow.metoffice.gov.uk and wow.meteo.be, the code is slightly modified from the diff that glennmckechnie posted to issue #1013
You can download a copy of restx.py with the changes here: https://github.com/evilbunny2008/weewx/raw/refs/heads/master/src/weewx/restx.py
Just replace the existing restx.py which resides in /usr/share/weewx/weewx/restx.py when you install using the Debian package, I don't know exactly where it would be for other install methods.
The above file is from the current weeWX master branch and only tested in weeWX 5.1.0 on Debian Bookworm running a 6.12 kernel from backports.
I have limited python experience and would value suggestions to make the code more pythonic if needed.
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