What "Presence Sensor" Means
Regular PIR sees only movement. Sit still 5 min → "no one home" → light off. Annoying.
Presence sensor (mmWave radar) sees human presence even motionless. Aqara FP2 = 60 GHz mmWave + PIR + light sensor.
Difference
Office, 2-hour computer session:
PIR: micro-movements keep on. 5 min deep reading = off. Annoying.
FP2: detects breathing/micro-motion. Light stays on. Leave → 30 sec → off.
Bedroom sleeping:
PIR: motionless = off. Child cries → light hits eyes.
FP2: knows you're in bed → 5% nightlight → ramp up gradually.
What FP2 Can Do
30 virtual zones
Count people (1, 2, 3+)
Pose (sitting/standing/lying)
Light level
0.5m precision
Specs
Range: 8m
FOV: 100° H, 40° V
5V USB-C
Wi-Fi 2.4 GHz + BT
Aqara Home, HomeKit (via M100), Matter
Real Scenarios
Office — on when seated, off 30s after leaving
Living room — different lighting per zone
Bedroom with kid — 1 sleep, 2 dim light, 3 calm mode
Office space — people count, virtual "busy" sign
Overkill For
Hallway, bathroom, balcony (PIR fine)
Outdoor (IP20)
Pitfalls
Price 600-800k UZS, 2-3× PIR
Hub needed for HomeKit
Microwave/60GHz interference (rare)
Zone setup 30-60 min
Sees through curtains/thin walls
Competitors
| Sensor | Tech | Price | Edge |
| FP2 | mmWave+PIR | 600-800k | Zones, count |
| FP1 | mmWave | 400-500k | Cheaper |
| P2 | PIR+microwave | 300-400k | Budget |
| Sonoff SNZB-06P | mmWave | 350-500k | Alt |
Zones/count → FP2 only. Just presence → FP1 or alts.
Mounting
Ceiling — best
Wall 2.2-2.5m — OK, half blind spot
Above door — hallway
Avoid behind TV (reflections).
Bottom Line
For smart lighting, not reactive.
Buy: office, multi-zone living, bedroom with kids, office analytics.
Don't: hallway, bathroom, budget setups.
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