Thank you for the support, fully understand now how this works. Once you know it, it's simple (free after Johan Cruyff)
Op maandag 3 februari 2025 om 22:45:48 UTC schreef gjr80: > Any field mapping in the driver is considered the default or starting > point - it should provide something that works for most users. Any > [[field_map]] entries in the [GW1000] stanza overwrite/replace the > default map contained in the driver. Any [[field_map_extensions]] entries > are used to alter the default field map in use (whether that be the default > field map from the driver or the field map specified in the [field_map] > stanza). So any field mapping in the driver should not be overwriting any > field mapping in weewx.conf. > > Hopefully the linked driver wiki pages make sense of the Ecowitt solar > radiation related fields available via the API and driver. When I wrote the > driver my aim was to map data from the Ecowitt API to equivalent field in > the WeeWX schema where they exist. The only direct equivalent was the > Ecowitt 'uvi' value which is mapped to the WeeWX UV field (UV index). The > Ecowitt API also provides a value referred to as 'uv' with a range of > values from 0 to 65535 microwatts per square metre. This is clearly not > solar irradiance as solar irradiance typically ranges from 0 to 1500 odd > watts per square metre whereas the 'uv' value ranges from 0 to jut 0.065535 > watts per square metre. So 'uv' was passed through by the driver as > 'uvradiation' (could not use 'uv' as that would be confused with the > existing WeeWX UV field). The final field provided by the API is referred > to as 'light' in the API documentation and is measured in Lux. There is a > commonly used approximation for solar irradiance given a light value in > Lux, but it is not the place of a driver to calculate such derived > parameters. That is handled better elsewhere in WeeWX, hence in the linked > wiki page you will see reference to adding a calculation for WeeWX field > radiation in the [StdWxCalculate] section of weewx.conf. > > It's messy and not really intuitive, but there is no simple solution here.. > > Gary > On Tuesday, 4 February 2025 at 08:12:23 UTC+10 Harry van de Laar wrote: > >> Regarding the 'uvradiation'field: I noted that in gw1000.py, the 'uv' >> field is mapped to 'uvradiation' . I can imagine this would be >> overwriting/blocking the fieldmap extension in weewx.conf. Anyway, >> changing the mapping in gw1000.py, results in a radiation values in the >> data base. >> Indeed my question is, is it the correct radiation. Thanks for the >> suggestions you made, I will go in to the details. >> Thanks >> Harry >> >> Op maandag 3 februari 2025 om 21:19:02 UTC schreef gjr80: >> >>> Reply received via email - for future replies to weewx-user posts could >>> you please use the '*Reply all*' button rather than '*Reply to author*'. >>> '*Reply all*' posts publicly on weewx-user avoiding my spam filter >>> discarding your 'post', let's someone else chime in if needed and most >>> importantly maintains a public record of the issue to aid others in the >>> future. >>> >>> Unfortunately your log extract truncated the entire WeeWX startup so >>> there is no detail on the WeeWX configuration. Please try again, if you are >>> following the instructions previously linked make sure you start the >>> capture of the log before you restart WeeWX otherwise you will miss the >>> WeeWX startup. >>> >>> The debug report looks fine. There are a few extractor entries under >>> [Accumulator] in weewx.conf that don't appear to make much sense >>> (uvradiation, >>> rrain_piezo, erain_piezo, hrain_piezo, drain_piezo, wrain_piezo, >>> mrain_piezo, yrain_piezo), but they will not be the cause of the >>> problem. >>> >>> That being said I suspect that you do not actually want to use the >>> uvradiation field. I note in your original post you want to facilitate >>> plotting of radiation and ET. In that case I suspect you will be >>> wanting to use the light value from the gateway device to approximate >>> solar radiance rather than the uvradiation field. You will find further >>> background on this in the Ecowitt gateway device driver wiki FAQ page >>> <https://github.com/gjr80/weewx-gw1000/wiki/Frequently-asked-questions> >>> under '*My Ecowitt station has a light sensor on my station, but I >>> don't see WeeWX field radiation. Where is it?*' The linked page >>> *Understanding >>> Ecowitt LAN Wi Fi Gateway API radiation fields >>> <https://github.com/gjr80/weewx-gw1000/wiki/Understanding-Ecowitt-LAN-Wi-Fi-Gateway-API-radiation-fields>* >>> >>> also provides further background and instructions for approximating solar >>> irradiance. >>> >>> 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 weewx-user+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/weewx-user/4443bc53-99c3-4cf2-8221-62cb48d61d15n%40googlegroups.com.
