I solved it !!
Now I have a Synolody DS 107+ connected to the La Crosse WS2357 using
USB2Serial converter and WView installed on the NAS that harvests the
data and builds charts and webpages.
The website is actually hosted under the apache web server installed
on the DS107+ but I am doing some investigation to have information
about free hosting.
At the end of the definitive installation-set I will post here the URL
of my website.
Regards
Enrico