Esphome variation

[TomTorger]

Great work! Really helps me figuring this out :-)

I am considering doing this for with an esp32 and espHome for home assistant.

I am a bit in doubt as to the function of the relays... I am figuring they are similar to the "push-bottoms"? However, there are two/three 10 A relays in parallel according to your diagram? Could we use optocouplers here as well? (not a pro :-) )

Do you have a description of the pins 1-8 on the SP30 board? And does it supply a DC voltage above 5V somewhere?

Tom