The illuminance/luminosity issue has come up several times over the past 4-5 years. I'm aware of issues #613 <https://github.com/weewx/weewx/issues/613> and #685 <https://github.com/weewx/weewx/issues/685> and this weewx-user thread <https://groups.google.com/g/weewx-user/c/MaWgABMS0rE/m/YZfeAxvPDQAJ>, there may well be others. From memory, I recall the following from a chat that Tom and I had some years ago:
- we agreed that the wview_extended field luminosity should be re-named or a new field added and whatever fields we end up with should be assigned a WeeWX unit group by default - we could not come up with a solution that would not impact existing users that utilise a 'light' related field (I do not include 'radiation' or 'maxSolarRad' to be a 'light' related field) - we agreed to leave things as they are until a solution was developed Unfortunately the record of that chat has long disappeared into the ether. At present the wview_extended schema includes a field named 'luminosity' but no field 'illuminance'. WeeWX assigns the field 'illuminance' to the unit group 'group_illuminance' (which only supports the unit Lux), WeeWX does not (by default) assign the field 'luminosity' to any unit group. This disconnect/omission provides a degree of protection in preventing illuminance data being unwittingly stored in the luminosity field as any such arrangement would require the user to make deliberate schema/unit group assignment/field mapping changes. Not a solution but a little history as to why we find ourselves in the position we are now. Gary On Saturday, 23 November 2024 at 08:05:59 UTC+11 vince wrote: > Perhaps. It's interesting that the weewx docs have an example of renaming > 'luminosity' to 'illuminance' (link) > <https://www.weewx.com/docs/5.1/utilities/weectl-database/?h=luminosity#rename-an-observation-type> > and > mention if for one model of fousb only. > > - https://en.wikipedia.org/wiki/Luminosity - energy per unit of time > (W) > - https://en.wikipedia.org/wiki/Solar_irradiance - energy per unit of > area (W/m2) > - https://en.wikipedia.org/wiki/Illuminance (aka brightness) in lux - > https://en.wikipedia.org/wiki/Lux > > FWIW as an example - a WeatherFlow station emits 'solar_radiation' and > 'illuminance' readings from the hardware. They report them as W/m2 and lux > respectively. Weewx group_radiation uses W/m2 for 'radiation' and > 'maxSolarRad' and group_illuminance uses lux for 'illuminance' if that > helps any. > > There was a long discussion in jan-2019 (wow) in the WF dev forum about > the differences. That particular gear derives radiation from the > brightness and uv sensors in the hardware. Guess every vendor does it > their own way. > > I think you talked my 'perhaps' above into a 'probably yes'. > > On Friday, November 22, 2024 at 11:23:06 AM UTC-8 Steeple Ian wrote: > >> In the current WeeWX repository. >> >> I am looking at wview_extended.py in the /scr/schemas folder. On line 77: >> - >> >> ('luminosity' , 'REAL'), >> >> Am I correct in thinking that this may be incorrect and should actually >> be 'illuminance'? >> >> Thanks, >> Ian >> > -- 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 visit https://groups.google.com/d/msgid/weewx-user/e66bfd77-a59a-418a-a875-a2a3523748edn%40googlegroups.com.
