A 5V power brick supplies the power for the logic. I considered using PoE for this purpose, but I was concerned that this would make the system too fragile.
"Why did the lights in my room go out? Oh.... I rebooted the ethernet switch."

Besides: I might use BLE as a control pipe rather then etthernet in the future. 

Dimmer circuits are notoriously noisy. So they have been isolated behind a canned line filter.

There are two large SSRs under the dimmer PCB to switch large circuits (room exhaust fans and exterior lighting array).

I left myself some space on the green perfboard JiC I feel the need to add manual controls to the box's face plate. Presently there are none.

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Software

ManuvrOS on top of vanilla esp-idf.