[hornychz]

Haha, usually it's unwittingly me who does that 

It's always good to have a follover ...  
(In the Czech Republic we have a saying: "The greatest joy is gloating!") 

To allow Cumulus to send soil and leaf data to WU, you need to do this:
Edit cumulus.ini (with Cumulus stopped) and add any of the following to the [Wunderground] section:
SendSoilTemp1=1
SendSoilMoisture1=1

You're right, as always, it works:


Thanks.
Best Regards