hello, I have a raspberry pi 3 B + that retrieves the information from my meter via the output 10. and I now want to send the information from my raspberry to a controller via bacnet with node red. but I do not know where to start. thanks for the answers you could give me

I would think that https://flows.nodered.org/node/node-red-contrib-bacnet would be a good start point.

And if you search on google for "node-red bacnet" you'll find a video that shows you what to do...