Searching dimming hardware

Hello,
I think you all can help me.

What I want to do?
For example every day wake up and let the room light breath in choosen colour or heartbeat dimming, the breath or heartbeat for example should go faster for a longer run time.
Not only on and off.

Node red runs on Unipi Neuron L203 (RS485, analog Out, digital Out, USB is possible, raspberry pi 3 is built in)

Target is light control. Wired variants are preferred.
It should be mounted on DIN rail in a main distribution. The lights are wired directly to the main distribution via relay output on L203

What offline hardware options are possible to archive the target?
I hope I'm in the right board to ask this