How to send commands from nodered to google assistant devices?

I can find alot of nodes of how to create "nodered devices" in google. But I want to control already existing devices in google home with nodered commands. I have a lawnmower in google home that accept commands like start, park, dock, status, stop. How can I send those commands from nodered to google assistant/home?
My main object is to send commands to park or start the mower according to weather forecasts in nodered.
I know there is a websocket flow for gardena, but cant make it work anymore.

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