i have built several such systems, in the past. if you could give a bit more info as to how you want to control the relays. that is directly on the pi or control the relays remotely. text me back and we can discuss further.
Humm buddy,,how r u?After raspberry pie and banana pie, orange pie is there,,,,,Me having a lot of experience with raspian. U will feel brotherhood..................
HI, I am kahan. I am embedded engineer and i have much experienced in hardware and software side.
I can help you make this and support in future work.
Waiting for further discussion.
Thank you