[werk_ag]

WeeWX was better planned from the start. Cumulus evolution comes a bit to late, the author was in the right direction and had momentum with v2 but he then apparently had a mood swing and draw back/stopped. Most of what v3 finally brings was already in WeeWX and elsewhere, while as far as I see (and I haven't had access to v3) it keeps some of it's weaknesses, namely the inability to give users the power to integrate new stuff directly within the program and not as more or less weird workarounds. Such is the nature of closed source and of "I really don't want/need to make a lot of money with this, but heck it's annoying these guys take my time and do not donate back" and "hell, I am not getting enough return on this. Perhaps I should stop but, again, I already put so much in it...perhaps I'd rather go on".

I respect your point of view, but as I said in my answer on other topic, WeeWX is not for everyone.
From the WeeWX webpage:

Required skills

In the world of open-source hobbyist software, weewx is pretty easy to install and configure. There are not many package dependencies, the configuration is simple, and this guide includes extensive instructions. There are thousands of people who have successfully done an install. However, there is no "point-and-click" interface, so you will have to do some manual configuring.

You should have the following skills:
•The patience to read and follow this guide;
•Willingness and ability to edit a configuration file;
•Some familiarity with Linux or other Unix derivatives;
•Ability to do simple Unix tasks such as changing file permissions and running commands;
•No programming experience is necessary unless you wish to extend weewx. In this case, you should have some familiarity with Python.

If you get stuck, there is a very active User's Group to help, but, please, try to solve the problem yourself before posting