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Smart Home

A relay is an electrical switch controlled by electricity instead of your finger. A smart relay adds WiFi, Zigbee, or Matter so you can control lights and appliances from your phone, voice assistants, or automations.

Yes. You install it behind your existing wall switch or inside the light fixture’s junction box. Your existing “dumb” bulb stays the same, but the power to it becomes smart. You keep your wall switch — it still works manually. But now you can also say “Hey Google, turn off the living room lights” or set a timer from bed.

Other Devices That Make a Dumb House Smart

Section titled “Other Devices That Make a Dumb House Smart”

Plug into your existing wall outlet, then plug any appliance into it. No wiring needed. Makes lamps, fans, coffee makers smart instantly.

Replace existing bulbs. Can dim, change color, or turn RGB. Downside: if someone flips the wall switch off, they lose power and become “dumb” again. Best paired with a smart relay.

Replace the physical wall switch plate with a WiFi/Zigbee version. Unlike smart relays (hidden), these replace what you see on the wall.

Replace the manual knob on your radiator. Opens/closes hot water automatically to maintain temperature per room. Schedule heating remotely. About half the price of Homematic IP.

Replace your door lock. Unlock with phone, PIN, fingerprint, or NFC. Auto-lock when you leave.

Battery-powered sensors that trigger automations: turn on lights when you enter a room, alert if a door is left open, detect water leaks.

Motorized controllers for existing blinds or curtains. Schedule them to close during peak sun and open at sunset.

Device that sends infrared signals like a TV remote. Makes your “dumb” TV, AC, or fan controllable from your phone or voice.

Wires into your existing garage door motor. Open/close/check status from your phone.

Send phone alerts, tell you which room triggered, and self-test.

Clamps onto your main water pipe. Automatically shuts off water if a leak sensor detects water.

Track exactly how much power your AC, fridge, or gaming PC uses. Essential where electricity is expensive.

Both Shelly and SONOFF have dozens of models. They differ across five main dimensions:

WiFiNo hub needed. Works with any router.Uses WiFi bandwidth; can be laggy if router is far. Best for 1–5 relays.
ZigbeeFast, local, low power. Creates mesh network.Needs a Zigbee hub (Home Assistant SkyConnect, SONOFF ZBBridge, Echo 4th gen). Best for 10+ devices.
MatterNew universal standard. Works with Apple, Google, Home Assistant.Still new. Good for future-proofing.
BluetoothVery cheap; no hub.Short range; slow; unreliable. Not recommended for relays.
Mini~40mm × 40mm × 20mmFits inside a standard wall box behind the switch. Essential for Philippines where wall boxes are small.
Standard~90mm × 40mm × 25mmNeeds more space; usually goes inside the ceiling junction box.
10ALED lights, ceiling fans, exhaust fansNot for aircons or water heaters
16AMost lights, outlets, small appliancesSafe for window-type ACs (5–10A draw)
25A+Water heaters, pumps, main circuitsHeavy-duty loads
1-gangControls 1 light circuitSimple wiring
2-gangControls 2 circuits independentlyFor 2 lights in one switch box
4-gangControls 4 circuitsComplex; usually ceiling box install
Power MonitoringMeasures real-time wattage and kWh. Essential where electricity is expensive.
DimmingControls brightness of compatible dimmable LEDs.
Dry ContactSwitches low-voltage signals (doorbells, gate motors) without passing mains power.
Roller Shutter ModeControls up/down motors for blinds, curtains, projector screens.

Quick Reference: “If You Need X, Buy Y”

Section titled “Quick Reference: “If You Need X, Buy Y””
Make 1 light smart, WiFi, no frillsSONOFF MINIR4 or Shelly 1 Mini
Make 1 light smart, Zigbee, reliableSONOFF ZBMINIR2 or Shelly Plus 1 (ZB)
Control 2 lights from 1 switch boxSONOFF MINI DUO or Shelly 2.5
Monitor how much power an outlet usesShelly 1PM or SONOFF POWR316
Dimmable LED lightsSONOFF MINI-D or Shelly Dimmer 2
Control roller shutters / curtainsShelly 2.5 or SONOFF DUALR3
Trigger a gate motor (dry contact)Shelly 1 or Shelly 1 Mini
Heavy load (water heater, pump)Shelly Plus 1 (16A) or SONOFF POW Elite
Future-proof, works with everythingSONOFF MINIR4M (Matter)

Given small wall boxes, hot weather, expensive electricity, and Type A/B plugs:

Most Filipino homes use split-type or window-type ACs with IR remotes.

  • Smart IR Blaster (Broadlink RM4 Mini, Tuya IR Hub): Control AC from your phone, schedule cooling before you arrive.
  • Smart AC Controllers (Sensibo Air, Tado): More advanced, with built-in temperature/humidity sensors and automatic temperature maintenance.

Use Type A/B smart plugs for electric fans, air coolers, and dehumidifiers. No wiring needed.

Important: Most cheap smart plugs on AliExpress are Type F (Schuko). Make sure you buy Type A/B smart plugs, or use a safe adapter.

Smart relays behind switches for outdoor lights, gate lights, security lights. Pair with motion sensors.

Motion SensorAuto-lights for CR, kitchen, hallways
Door/Window SensorAlerts if gates/doors left open; trigger AC off if window opens
Water Leak SensorEssential during typhoon season — place under sinks, near drains
Humidity SensorTrigger exhaust fans or dehumidifiers when humidity spikes
Temperature SensorTrigger fans or AC when room gets too hot
  • IP Camera facing gate/street
  • Smart doorbell
  • Smart relay for gate motor — open/close automatic gate from phone

Electricity in the Philippines is expensive (Meralco rates among highest in Asia).

  • Smart plugs with energy monitoring — see exactly how much your AC or gaming PC costs per month
  • Whole-home energy monitors (TONGOU 63A breaker) — track total household usage in real time
  • Use relays with power-loss memory — resume last state when power returns
  • Add a UPS to your router + smart home hub so automations still work during brief brownouts
  • Smart sensors can send phone alerts when power goes out (if WiFi is on battery backup)

Typical “Pinoy Starter” Smart Home Kit

Section titled “Typical “Pinoy Starter” Smart Home Kit”
Device Purpose Est. Price (AliExpress)
Broadlink RM4 Mini or Tuya IR Blaster Control AC, TV, fan remotely ~400 – 800 PHP
Type A Smart Plugs x3 Fan, air cooler, lamp ~300 – 600 PHP each
Smart Relay x2 Gate light, outdoor security light ~400 – 700 PHP each
Door/Window Sensors x2 Gate + main door alerts ~200 – 400 PHP each
Motion Sensor x2 CR + kitchen auto-lights ~200 – 400 PHP each
Water Leak Sensor x2 Under kitchen sink + near drain ~200 – 400 PHP each
Temperature/Humidity Sensor Trigger fans/AC ~200 – 400 PHP
IP Camera x1 Gate/front door ~600 – 1,500 PHP

Total starter budget: roughly 3,000 – 6,000 PHP (about 50 – 100 EUR)

AliExpress Cheaper Alternatives to Shelly / Homematic IP

Section titled “AliExpress Cheaper Alternatives to Shelly / Homematic IP”

These were found live on AliExpress with good reviews and tens of thousands of sales:

Product Type Approx. Price Rating Sold
SONOFF ZBMINIR2 Extreme Zigbee Zigbee relay ~13 – 26 EUR 4.8 2,100+
SONOFF MINIR4M Matter Matter/WiFi relay ~18 – 35 EUR 4.8 1,000+
SONOFF MINI-D WiFi WiFi relay ~12 – 23 EUR 4.9 1,100+
GIRIER Tuya ZigBee 3.0 10A relay Zigbee 1-4ch module ~7 – 13 EUR 4.8 34,000+
Aubess Zigbee switch Zigbee wall switch / relay ~6 EUR 4.7 3,400+
TONGOU TO-Q-SY1 WiFi 63A WiFi main breaker / switch ~13 – 23 EUR 4.8 13,600+

Alternatives to Homematic IP (Radiator Thermostats / TRVs)

Section titled “Alternatives to Homematic IP (Radiator Thermostats / TRVs)”
Product Protocol Approx. Price Rating Sold
MOES ZigBee TRV Zigbee 3.0 ~23 – 31 EUR 4.6 – 4.7 1,800 – 2,600+
MOES Tuya ZigBee TRV (packs) Zigbee 3.0 ~24 – 31 EUR 4.6 700+
Generic Tuya ZigBee TRV Zigbee 3.0 ~24 EUR 4.5 80+
Qiumi HY368 Tuya TRV Tuya / Zigbee ~14 EUR 4.0 24+

Bottom line: Basic Zigbee or WiFi relays cost roughly 50–70% less than comparable Shelly modules. MOES TRVs are about half the price of Homematic IP with strong reviews.