Aqara FP2 Review: The Best Presence Sensor for Smart Homes?

What Is the Aqara FP2?

The Aqara FP2 is a 60 GHz millimetre-wave radar presence sensor launched in 2023 and now firmly established as the benchmark for smart home occupancy detection. Unlike passive infrared (PIR) motion sensors that can only detect movement, the FP2 continuously monitors the microenvironment for the tiny movements of breathing and heartbeat — meaning it registers a person sitting motionless reading a book just as reliably as someone walking across a room.

This single capability difference transforms smart home automation. Lights no longer switch off when you're sitting still. The HVAC doesn't stop when you're quiet at your desk. Security automations trigger correctly even when an intruder is trying to remain still. The FP2 makes all of this possible in a small, ceiling- or wall-mountable disc that connects over Wi-Fi 802.11b/g/n (2.4 GHz).

What Are the Specs and Coverage Area?

Why Is Radar Better Than PIR for Presence Detection?

Passive infrared (PIR) sensors detect infrared radiation changes caused by movement — specifically, the heat signature of a moving warm body crossing the sensor's detection area. The moment movement stops, the sensor resets after a brief timeout. This is fine for detecting entries but terrible for occupancy — it doesn't know if you're sitting still in the room.

The Aqara FP2's 60 GHz millimetre-wave radar emits continuous radio waves and analyses the return signal. Because radar detects micro-movement — the 0.1–0.3 mm chest expansion of breathing — it registers stationary presence accurately. A person sitting at a desk, lying in bed, or even a sleeping pet registers clearly. This technology (also called mmWave or FMCW radar) was previously found only in commercial building management systems. The FP2 brings it to the $60–$80 consumer price range.

The practical result: zero false-off events. In testing across a living room and home office, not a single instance of a light switching off with a person present was recorded during a 60-day test period — something that was a daily occurrence with PIR sensors.

How Does Multi-Zone Detection Work?

The FP2 maps the room into a configurable grid in the Aqara Home app. You can define up to 30 custom zones — for example: "sofa area," "desk area," "doorway," and "bed." The sensor reports presence per zone independently, allowing hyper-granular automations.

Example use cases enabled by zone detection:

• Dining table zone presence → dim lights to dinner scene, mute TV
• Desk zone presence → switch on desk lamp, start focus music
• Bed zone → trigger bedtime scene when you lie down
• Doorway zone → turn on hallway light when entering, off when leaving

The sensor can simultaneously track up to 5 targets, showing individual positions on a live map in the app. This makes it the only affordable consumer sensor capable of room-level person tracking without cameras.

Does the Aqara FP2 Work with Home Assistant?

Yes — and the integration is excellent. The FP2 connects to Home Assistant via the HomeKit Device integration, which requires no Aqara hub. The device exposes as a HomeKit accessory that Home Assistant can import directly.

In Home Assistant, the FP2 provides:

• One binary sensor per configured zone (presence/clear)
• A global "occupancy" binary sensor for the whole room
• Illuminance sensor (lux) for light-level-based automation
• Multiple target tracking sensors (x/y position coordinates) when using local API integration

For advanced users, third-party custom integrations (such as aqara-home-assistant on HACS) expose the full zone map and real-time target coordinates, enabling room-level people counting and positional automations in HA.

How Does It Perform in Real Life?

Testing the FP2 in a 28 m² open-plan living/kitchen area and a 14 m² home office revealed extraordinary accuracy. Stationary presence detection at 4 metres with no movement: consistent. Stationary detection at 8 metres: consistent. The sensor correctly identified one person sitting, another person standing in kitchen, simultaneously — displayed as two dots on the zone map.

Response time from entering a zone to the binary sensor triggering in Home Assistant: 0.8–1.5 seconds. This is slightly slower than PIR sensors (which respond in 0.3–0.5 s) but entirely acceptable for lighting automation — fast enough that lights come on before you need them.

Fall detection is listed as a feature for wellness monitoring. In testing, falls to the floor registered correctly 7 out of 8 attempts — reliable enough for elderly care automations where a notification is better than nothing.

What Are the Limitations?

• Price: At $60–80, it's 3–5× the cost of a basic PIR sensor. It's worth it, but requires justification per-room.
• Wi-Fi only: No Zigbee or Z-Wave option, which means it relies on Wi-Fi infrastructure and slightly higher power consumption than battery-powered Zigbee sensors.
• USB-C powered: Requires a cable run to ceiling or wall — no battery option.
• Setup complexity: Zone configuration in the Aqara app is intuitive but takes 15–20 minutes to set up properly per room.
• Through-wall leakage: 60 GHz radar can detect motion through thin partition walls and furniture. Careful zone calibration is needed to exclude adjacent rooms.

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