Seasons skin, multiple WH51 sensors - wrong units

[paulth...@gmail.com]

I bought a HP2551 weather station to replace my old, trusty but crusty WH3081.

I went with the Seasons skin, because it was the only one that seemed to recognise the  WH51 moisture sensor.  I followed some Internet instructions to display the WH51 readings as a percentage instead of "cb"; job done.

I recently bought a second WH51 sensor, and added it to weewx.conf in the same way (soil_moisture_percent) as the first sensor; it stubbornly displays as "cb".

Any ideas?

Cheers!

[Mark Fraser]

I'm in the same situation. Looking at the weewx documentation it only supports cb units for moisture. Was looking to see if there is a conversion between units.

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[vince]

A search for "moisture units" here found this link - https://groups.google.com/g/weewx-user/c/0FrJfajXxcs/m/_0Foj58-AQAJ

[Rainer Lang]

Assuming you assign your WH51 sensors to the SoilMoist1 thru SoilMoist4 database fields, be via a fieldmap extension or a StdCalibrate/Corrections entry in weewx.conf,
you will also have to add some changes to extensions.py (in /usr/share/weewx/user or /home/weewx .... depending on your installation):
(I also assume you are using an extended Interceptor driver for weewx to read the HP2551 consol posts)

import weewx.units

weewx.units.obs_group_dict['soilMoist1'] = 'group_percent'

weewx.units.obs_group_dict['soilMoist2'] = 'group_percent'

for each of the four available soilMoist fields in the wsview_extended database schema, you will need to make such an entry
(but only if you have another WH51 sensor) if you want their readings shown in % rather than in cb
if you have more than four WH51 (and want to save their values in the database), you will either need to repurpose other not used fields in the wsview_extended database schema or create additional columns in your database e.g. by the help of the wee_database tool

(the entry/line "import weewx.units"  needs to be there only once; if it's already there, you don't need to add it a second time !)

weewx needs to restarted after having made the changes to extensions.py

[paulth...@gmail.com]

Thanks Rainer!

extensions.py was indeed the missing piece I needed to get the right units.

Cheers,

Paul.