Hello to my fellow 
Swiss mates,
I would like to kindly share my little success of the day 
:
I live in Switzerland (Vaud/Waadt), and I successfully got communication with my Integra Aquaradio Smart Meter, composed of the folowing:
- https://ch.integra-metering.com/fr/product/aquastream-m-bus-2/
- [Same URL] aquaradio-smart-m-bus
I bought a nanoCUL M-Bus Adapter, and it went far more easy than expected:
- Installed the wmbusmeters HA Add-on: GitHub - wmbusmeters/wmbusmeters-ha-addon: The official ha-addon repository for wmbusmeters.
- Plugged-in the nanoCUL, forwarded the USB to the HA VM
- Started the add-on
- Instantly found some telegram from my meter
- Finalized the config via the add-on WebUI: no key was even required!
- MQTT device showed right away!
I was prepared to spend hours, even that it would simply not work at all!
I would like to warmly thanks all the team behing the wmbusmeters project, it is really wonderful! 
