I’m using DAVdroid (on Samsung Galaxy S8) to connect my Calendar on Synology NAS. It works like a charm following this guide here: https://www.davdroid.com/tested-with/synology/
Now I’m trying with the cardDAV Server for a few hours and I’m always getting “Couldn’t find CalDAV or CardDAV service”.
For base URL I set: https://myserver.me:8443/addressbooks/users/myname , but it will not connect. Also tried with HTTP and port 8008 or by adding the addressbook at the end or URL. No luck.
If I enter the base URL in a browser on my desktop I can see files and my addressbook there. I can also set up connecttion with this base URL in my desktop email client.
I hope for some help here.