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Yep. Didn't realize the forums were moderated until after I submitted the duplicate. Thought I screwed up somehow posting the original.

Adding "dtoverlay=miniuart-bt" to /boot/firmware/config.txt on Ubuntu 22.04 did the trick. Z-Way is happy now. Thanks for pointing me in the right direction. The main reason to use a stock image is knowing what is required to make the Razberry work on an OS that I put together. I'm using t...

Additional info:

I did an apt-get update and apt-get upgrade to the Z-Way OS image. After rebooting into the new kernel, uname -m shows aarch64 AND Z-Way still works just fine. So, I don't think I have an architecture issue. I have an issue in the generic OS with the serial communication somehow.

I'm new to the Razberry and I have it physically installed on my RPi 400. When I attempt to use a basic Raspian or Ubuntu OS on my RPi 400, Z-way installs fine but never is able to bring up the Razberry 7. When I use the custom Z-Wave Raspian image, everything works fine. The Razberry 7 is detected ...

I'm new to the Razberry / Z-Way world so bare with me. I have a Razberry 7 on my Raspberry Pi 400. I've tried it with a base Raspian 32-bit install as well as Ubuntu 32-bit 22.04 install and Z-Way always fails to bring up the Razberry 7 and shows 0 devices in expert UI mode. Using the Z-Way SD card ...