Retrieve/change Z-Wave device parameters with new SmartThings

The zwave tweaker was updated for the 2021 version of the app, but still requires the groovy cloud, so it will go away when the cloud does in a few months. But it should work for now. Did you try that version? Here’s a direct link.

Also, what’s the brand/model of your device? Many battery-powered devices can’t be reconfigured on the fly, only when they first join the network, so the tweaker doesn’t work with those.