Rain measurement under-reporting

[Rich Hutchinson]

Hello,

I have an Ecowitt WS2910 (seems to be similar to the more widely reported WH2910C according to wxforum) which is working very well - uploading data automatically to the Internet using both the built-in Ecowitt web service and config I set for Wunderground.

I additionally set up weewx on one of my servers at home (v4.10.2-1 latest version as provided by the standard Debian 11 repos) and configured it with the latest release of the weewx-interceptor driver from matthewwall's github. The weewx website is internal only currently, not visible on the Internet.

It seems to collect the data nicely and everything appears identical to the data recorded on ecowitt.net and wunderground EXCEPT for rainfall which is always being under-reported.

The sensor array (WS69) which is connected via radio to the WS2910 console updates every 16 seconds (doesn't appear to be configurable) - the console then uploads once per minute to ecowitt.net and wunderground. For weewx collection, I have configured the console to upload to my weewx server every 30 seconds. 

The weewx.conf is almost entirely stock - the only thing I can see perhaps affecting it is the "archive_interval" of 30 which I set to match the interval the console is uploading. Is this what I should be doing?

Anyway, rain data as reported in weewx is always way under what the daily amount the console reports (which is identical to the data shown on ecowitt.net and wunderground).

See these snips of graphs from today since 00:00:

Ecowitt (4.3mm recorded):

Wunderground (4.3mm recorded):


weewx (neowx-material skin, same issue on the "Seasons" one - 2.5mm recorded):


Weewx must be doing something different here - it looks like it is maybe missing/not registering some of the "bucket tips" perhaps (happy to be corrected). Strange since the console, ecowitt.net and wunderground data all match up.

What should I be looking at and what more info could I provide to get to the bottom of this?

Happy to share any other config snippets/db extracts etc from weewx

Thanks in advance...