Since I took so much inspiration from this forum I’d like to share my own result.
Essentially it’s based on the matrix template with only minor modifications ..
Many of my devices are battery powered. I still do not trust those Z-wave devices 100% therefore regularly check for the last battery update. In case the update is older than 24 hours the icon get’s coloured in red as a warning of a potential offline-state.
The weather widget I did by myself (almost everything else is picked from somewhere ..). Sun Position comes from < Show Current Sun Position and Shadow of House (Generate SVG) - HABPanel Examples - openHAB Community>
S-Bahn schedule comes from < [Deutsche Bahn Monitor - Denkanstöße gesucht - KNX-User-Forum]
Calendar : < [Solved] Show Google Calendar Events in HabPanel/Sitemap - CalDav Personal - Openhab 2.4 - #3 by Matt_Foreman - Bindings - openHAB Community>
Neato Botvac: < Neato BotVac Vacuum Cleaner Widget for HABPanel - HABPanel Examples - openHAB Community>
Solvis Heating: < [SOLVED] SOLVIS Heating - Home Automation - openHAB Community>
Obviously there’s still much to be done. Camera’s shall be added, attendance record based on wifi-login, email notifications … maybe adding the SmartTV ..
As it seems I’ll be grounded (Corona / Covid-19) for a couple of more weeks so I’m positive for some good progress …