The Room-by-Room Smart Home Sensor Map I Would Use for a 2-Bedroom HDB BTO

date

May 6, 2026

slug

room-by-room-smart-home-sensor-map-hdb-bto

author

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Public

The design rule

The map I would use is assistive, not aggressive.

That means:

Physical switches still matter.

Buttons should exist for common scenes.

Leak alerts matter more than fancy dashboards.

Kids room automations should be conservative.

Bathroom and kitchen automations should not fight normal human use.

Nothing critical should depend only on a vendor cloud.

This works especially well with the current Apple Home + Aqara direction because Apple Home supports the relevant Matter categories, while Aqara gives a practical sensor/button ecosystem and a bridge path through products like the Aqara Hub M3.

The source checks that change the plan

There are a few important caveats before placing sensors everywhere.

Aqara's Hub M3 can bridge Aqara devices and can expose an IR aircon path to Matter, but Aqara's own wording includes a one-AC Matter exposure limitation. That makes it risky to assume one M3 will elegantly expose every Mitsubishi Starmex fan coil into Apple Home.

If room-by-room aircon control matters, Sensibo Air is cleaner to reason about because Sensibo says one unit is needed per air conditioner.

Curtains have a similar trap. Somfy and TaHoma are promising, but Somfy's TaHoma switch page says Apple Home support is for select Zigbee motor paths. I would not assume RTS motors appear cleanly in Apple Home without model-level confirmation.

For sensors, Aqara's Motion and Light Sensor P2 and Door and Window Sensor P2 are useful Matter-over-Thread candidates, while local Singapore availability signals exist through Smart Innovations for products like the Water Leak Sensor T1.

What I would prioritize first

Not every room deserves equal attention on day one.

If I were sequencing this for a real renovation, I would prioritize by safety, daily friction, and whether the decision becomes hard to change after carpentry.

Priority	Area	Why it comes first	What can wait
0	DB, router and hub area	Every later device depends on power, Wi-Fi, hub placement, ventilation and access.	UPS monitoring, temperature monitoring and advanced network segmentation.
1	Kitchen and service-yard leak monitoring	Water damage is high-consequence, and leak sensors are cheap, quiet and useful.	Appliance energy monitoring, laundry-done automation and cameras.
2	Entrance and `All Off` control	This is the highest-frequency control point and the easiest place to make the home family-friendly.	Presence-based away mode, auto-lock logic and extra entrance camera logic.
3	Corridor night path	It solves a real daily problem without needing complicated occupancy logic.	Multi-zone adaptive lighting.
4	Master bedroom and kids room comfort	Bedrooms shape sleep, caregiving and aircon comfort. The kids room should stay conservative.	Advanced presence detection and surprise curtain/light routines.
5	Living and dining scenes	Useful, but easier to tune after furniture and routines settle.	Presence sensors, media-linked scenes and aggressive auto-off rules.
6	Bathrooms	Humidity and night-light logic can help, but wet-zone placement and circuit safety make this more sensitive.	Fan automation and occupancy-heavy logic.
7	Windows and curtains	Power provision matters early, but automation should wait for exact Somfy motor compatibility.	Sunset routines and window-state logic.
8	Robot-vacuum dock	Dock location matters before carpentry, but sensors depend on the exact robot and dock style.	`Cleaning` scene tuning and robot integration.
9	Advanced optional layer	Home Assistant, energy dashboards and room-level presence are better after the home is stable.	Everything here can wait.

The short version: do infrastructure, water-risk areas, entrance control, night movement and bedroom comfort first. Then add the fun stuff.

The room-by-room map

Zone	What I would sense	What I would automate	What I would avoid
Entrance	Main door open/closed, lock status if reliable, near-door scene button.	Entry light after sunset, delayed door-left-open alert, manual `All Off` and `Away` scenes.	Auto-lock or auto-unlock based only on phone presence.
Living and dining	Motion/light, optional presence if the sofa/dining logic needs it, scene button.	`Bright`, `Relax`, `Movie`, `Cleaning`, and `All Off` scenes.	Short motion timeouts that turn lights off while people are watching TV.
Kitchen	Leak detection under sink or water purifier path.	Leak alert, audible/visible cue, optional low utility light after dark.	Auto-off for task lights while cooking and high-load smart plugs without proper rating.
Service yard	Leak detection near washer inlet/floor-trap area, optional humidity.	Leak alert and visible cue in kitchen/living.	Assuming Wi-Fi is good enough without testing.
Corridor	Motion/light for night movement.	Low `Night Path` lighting during `Sleep` mode.	Full-bright lights for sleepy bathroom trips.
Master bedroom	Bedside button, temperature/humidity, optional motion, curtain state if useful.	`Sleep`, `Wake`, soft lighting, curtain routine, conservative aircon scene.	Auto-off based only on motion; sleeping people are too still.
Kids room	Door state, temperature/humidity, caregiver button, optional low night-path motion.	Soft caregiver light, comfort alerts, gentle door-open awareness after bedtime.	Intrusive sensing, aggressive auto shutoff, surprise curtain/light actions.
Bathrooms	Humidity, leak risk, optional dry-position motion.	Low night light if supported, humidity reminder or fan routine if safely wired.	Ordinary smart devices in wet zones or very short auto-off timers.
DB/router/hub area	Optional temperature or power/UPS status later.	Outage alerts only if available.	Sealing hubs inside metal cabinets or signal-killing carpentry.
Robot-vacuum dock	Leak detection if using a water dock or future direct plumbing.	`Cleaning` scene and leak alert.	Hiding the dock so tightly that tanks, bags, and sensors cannot be serviced.

The scenes I would actually start with

I would not begin with dozens of automations.

I would start with these:

Home

Away

Sleep

Wake

Guest

Cleaning

Night Path

All Off

The important part is not the number of scenes. It is that the household can understand them.

If a guest, helper, parent, or half-asleep adult cannot guess what a scene does, the name is probably too clever.

The first buying phase

For v1, I would buy sensors in this order:

Entrance contact sensor and all-off button.

Kitchen and service-yard leak sensors.

Corridor motion/light sensor for night path.

Temperature/humidity sensors for master bedroom and kids room.

Bedside and caregiver buttons.

Living/dining scene button.

Optional presence sensor only after real-life motion logic proves annoying.

That order keeps the home practical. It solves daily friction and catches water problems before chasing advanced occupancy logic.

Final thought

The smartest version of this home is not the one with the most sensors.

It is the one where the lights still work normally, leaks are noticed early, kids-room routines stay calm, and every important automation has a boring manual fallback.

That is the kind of smart home I would actually want to live with.

➡️

For the wider foundation, read I Still Wouldn't Bet My HDB Smart Home on Matter Alone and Your BTO Electrical Points Are Not a Renovation Plan.