Dim a scene at sunset

Hello,
can someone tell me how to dim from one scene to another at sunset?
Thanks in advance.

In the Groups and Scenes app, there is a section to create a transition. It will create a scene activator device which can then be controlled like a switch or button.

Then you can just use that device in a RM rule or Simple Lighting, etc.

thank you, go try !!!

I succeeded in the first one, Thank you. But what should I select in RM as 'select action type'?

Select 'Control Switches or Push Buttons', then either 'Turn switch on' or 'Push Button'. Then you'll be able to select that device that was created by the app. Personally, I like to use 'Push button' so I don't have to worry about resetting the switch to 'off' to ready it for the next use.

Thank you it works !! But now I have another problem, I have set the above dimmer. With this I switch on 2 groups of lights. At sunset must be 1st should dim the 1st group and the second only when it is on !! but at sunset the 2nd group comes on and starts to dim!

thanks for reply!