Wanted to share my experience in case it helps others.
I had been trying to use an Aeotec Z-Stick Gen5 (ZW090-A) with Home Assistant OS running on a Raspberry Pi 4. No matter what I did, the Z-Stick would just blink red, blue, and orange when plugged in — even through a USB 2.0 hub. It never showed up properly in Home Assistant. I tried all the tricks: resetting it, draining the internal battery, using hubs, holding buttons — nothing worked. Turns out, it’s a known issue with the Gen5 and RPi 4’s USB setup.
Finally, I bought a Zooz 800 Series Z-Wave Long Range S2 USB Stick (ZST39 LR). Plugged it into the same Pi 4… and boom — it showed up instantly. No hub needed, no messing around. Home Assistant recognized it immediately, and I was able to adopt it into Z-Wave JS without any problems.