Hello,
I want to file another hardware solution.
It is a known issue, that Aeotec Z-Stick Gen5 doesn’t work with the USB slots of the Raspberry Pi4. The RPi4 refuses to connect. It is said that, the Aeotec Z-Stick Gen5 doesn’t fully hold to the specs of USB.
It has been observed somewhere else, that the stick connects, when using a cheap USB hub. I payed 5 Euro on Amazon for the VKUSRA USB Hub, 4-Port USB 2.0 Hub Ultra Slim.
Does work great so far. The stick is recognised. I get the Z-Wave JS integration suggested by HA.
I don’t know, if the internal battery of the stick is rechargeable and if the USB-hub supports this, though. Could not find out specific details.
Maybe this is of help to anybody