532B Bishan — Smart Switches

White H1 neutral baseline, with Z1 Pro 4-rocker used at L1/L2 for compact bedside scene controls. Add the first-buy sensor batch now: FP300 for kitchen, common toilet, and master toilet. Olivia's SLG catalogue pricing is used as the SKU source of truth, with the SLG member bulk tier applied after subtotal as an estimate subject to catalogue terms.

• Use white neutral SKUs throughout; H1 remains the baseline and Z1 Pro is the bedside exception.
• Order only 3 sensors first: kitchen FP300, common toilet FP300, and master toilet FP300.
• Keep SS1 as H1 1G so the shelter light stays on the same smart-switch standard.
• Use B, C, F, G, H, and K as H1 3G upgrades for curtain and scene capacity.
• Use L1/L2 as one Z1 Pro 4-rocker per bedside, grouping bedhead lights and adding MBR curtain, wardrobe, toilet, and night-mode scenes.
• Keep M3 as the in-bedroom master-heater scene rocker that mirrors HC via Home Assistant.

Confirmed constraints

• Curtain sockets are high near the pelmet/window head; treat them as curtain-motor power first.
• No extra outlet/USB point is assumed because wiring is already done.
• Kitchen is induction, so no gas-leak sensor is planned.
• Bedroom presence should trigger dim path/night lighting, not full lights at night.
• Air-con automation is undecided and should not drive the sensor purchase yet.

Working recommendation

• Coverage fades are spec-informed ray-cast estimates, not a guarantee: stronger near the sensor, weaker with distance and after attenuating elements.
• FP2, FP1E, and FP300 use directional wall/corner placement assumptions around 120°; the map models horizontal coverage only, not mounting height.
• Solid black wall segments stop the FOV; the study half-wall/glass and C4 ceiling beam reduce confidence without fully blocking it.
• Dashed green lines show the only wired-from-curtain-power sensor candidates if a serviceable USB adapter/split is possible.
• Living/dining does not get an FP2 at C/C4 unless a new always-on 5V feed is added later; there is no marked wire point there.
• Kitchen, hall, and toilets are not wired for presence sensors in this plan; they use battery devices unless new low-voltage power is added.
• First sensor purchase is deliberately limited to kitchen and the two toilets; the rest stay as later candidates after you have lived with the automations.