Smart Switch Plan

The Two-Layer Approach

Every room has two layers of lighting control:

Layer 1 — Wiring (your job)

Each button is wired to a small relay module behind the switch plate, controlling one group of lights on one circuit. All lights in the group go on/off together.

Button press → relay → ALL lights in that group turn on/off Always works. No internet needed.

Layer 2 — Smart (Sean handles)

On top of the basic wiring, we add smart bulbs that allow dimming, scenes, and automation. This doesn't affect the electrical plan — Sean sets it up after construction.

What this means for the electrical plan Fewer switches, simpler wiring. Each button controls one circuit — spots, accents, or fan. The smart layer is added later and doesn't require any extra wiring.

Bedrooms — Spots + Accents + Fan

Every bedroom gets a 2-gang switch (lights) + 1-gang switch (fan) at the door.

Switch	What it controls	Notes
2-gang — Button 1	Direct / spot lights — one circuit	Downlights, ceiling spots
2-gang — Button 2	Accent / indirect lights — one circuit	Wall lights, cove lighting, ambient
1-gang	Ceiling fan	Separate circuit for fan

Spots vs accents = task lighting vs mood lighting One button for bright, one for ambient. Both can be smart-dimmed individually via Zigbee later.

Kitchen / Living / Dining — Zone Switches

2-gang (spots + accents) + 1-gang (fan) per zone. Entry zone has no fan.

Zone	2-gang — Button 1	2-gang — Button 2	1-gang
Kitchen near entry	Relay Spot lights Downlights, task lighting	Relay Accent lights Pendants, under-cabinet	Relay Fan / hood
Living near sofa area	Relay Spot lights Downlights, ceiling spots	Relay Accent lights Wall lights, cove lighting	Relay Ceiling fan
Dining near table	Relay Spot lights Downlights	Relay Accent lights Pendant, ambient	Relay Ceiling fan
Main Entry at front door	Relay Entry / foyer lights First light when you walk in	Relay Outdoor / porch light Welcome light	—

Current: ~22 buttons across 6 panels

Proposed: 11 buttons across 7 panels

Every button always works Each button directly controls its circuit. Spots and accents are independent — use one or both. No smart system needed.

Bathrooms & Corridors

Bathrooms

2-gang at entry:

Button 1: Main / ceiling lights (one circuit)
Button 2: Mirror/vanity light

Exhaust fan: automate via humidity sensor — no switch needed

Corridors

2-gang at each corridor entry:

Button 1: Low / ankle-level lights (one circuit)
Button 2: Spot lights (one circuit)

Room-by-Room Summary

Room	Current	Proposed	Circuits
Parents Bedroom	8 btns	3 wired	Spots (1) + Accents (1) + Fan (1)
Kids Bedrooms ×3	8 each	3 wired	Spots (1) + Accents (1) + Fan (1) each
Lock-off Bedroom	8 btns	3 wired	Spots (1) + Accents (1) + Fan (1)
Kitchen / Living / Dining	~22 btns	11 wired	3 zones × (spots + accents + fan) + entry (2)
Bathrooms ×4	3 each	2 each	Main (1) + Mirror (1)
Corridors	~4	2 per entry	Low lights (1) + Spots (1)
TOTAL	~78 buttons	~38 wired	51% fewer switches

Fan Controller Upgrade Path

The 1-gang fan switches are standard on/off. Later, they can be upgraded to smart fan controllers for speed control:

Sonoff iFan04 — in-canopy module (220-240V) Installs inside the fan canopy (not in the wall). Supports 220-240V (Thailand-compatible), 4-speed control, and app/voice control via WiFi. Can be flashed with Tasmota for local-only control. The wall 1-gang switch stays as a physical fallback.

Note: Most Zigbee fan controllers (e.g. Inovelli Blue Series) are US-only at 120V. The Sonoff iFan04 (WiFi) is the best 220V option currently available. Sean will handle this upgrade post-construction — no wiring changes needed.

Note to Architect

What we still need from the electrical plan:

Neutral wire at all switch points
45mm deep switch boxes (for relay modules)
Momentary/retractive switches (not toggle)