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Now I have bought a Z-Wave Aeotec Z-Wave 7 Stick, connected that one to my HA in Proxmox and everything is fine in HA.
Thanks for Support, I will send back the Rehau device since they have told me they don't provide a newer Z-Wave version.

Home Assistant supports Z-Wave. If you have a single device, then maybe just getting a Z-Wave USB adapter and using the Z-Wave integration in Home Assistant will get you what you need. https://www.home-assistant.io/integrations/zwave_js/ Which USB adapter would you recommend? I am runnnig HA on Pro...

Home Assistant supports Z-Wave. If you have a single device, then maybe just getting a Z-Wave USB adapter and using the Z-Wave integration in Home Assistant will get you what you need. https://www.home-assistant.io/integrations/zwave_js/ Which USB adapter would you recommend? I am runnnig HA on Pro...

No, that is the thing, I only have one device connected to Z-Wave and that is the Re.Guard water control system. My other devices are already fully managed in Home Assistant. Like I said I already have a Raspberry PI4 but would rather like to use a VM inside of my Proxmox since this is already up an...

Thanks , very good answer. So I will now wait and see if Rehau comes back to my request. I have also checked the link you shared that someone was able to get it into Home Assistant, but I think that is a different device it is the Nea Smart 2.0 Gateway which is different from what I have. If Rehau w...

Ok, understand, so your recommendation is to move away from my Rehau Hub und deploy a new Raspberry Pi plus that Razberry 7 modul to support Z-Wave. I have a RaspberryPI 4 which I am not using, but I would prefer using my Proxmox and install a Windows or Linux and connect a Aeotec Z-Stick 7 | Z-Wave...

Yes I am able to take a backup, but not sure how I should migrate then using a Raspberry image or what to do to get mine upgraded to newer version:

Ok thank you so much for your answer. I have sent a request to Rehau support, hope they will come back to me. Tried to search for an upgrade online using the mobile app, but there was no upgrade available. Will wait for an answer.

Hello! Connection to HA is possible starting from 3.2.3 and upper. You should write to Rehau asking them to release a new version. Z-Wave.Me is supporting Rehau with new versions upon request. ok thanks, so do you think when I send a request to Rehau they would release an update for my hub? Is it a...

I hope someone can help with my issue connection my z-Wave hub to Homeassistant. I keep getting the error message "no UUID set" when I try to integrate my Z-Wave gatway to HA. The problem is that my Z-WAVE gatway was provided by a supplier called Rehau re.hub I do have full access to the w...