Aqara Presence Sensor FP2
VERDICT
This is not a motion sensor; it is a human radar. The FP2 solves the oldest problem in smart homes: "Lights turning off when I'm still in the room." Its ability to map zones and detect breathing makes it the most powerful automation trigger available today, despite a slightly complex setup.
The Big Picture
Standard sensors work by detecting big movements (IR heat). If you stop moving, they think you left. The Aqara FP2 uses mmWave radar technology (similar to what's in self-driving cars) to detect micro-movements, like your chest rising and falling while you breathe. It ensures your lights stay ON until you actually leave the room.
📍 Zone Positioning
This is mind-blowing.
The Grid: In the app, you see a map of your room. You can draw "Zones."
The Magic: One sensor can act like 30 sensors. If you walk to the Sofa Zone, it turns on the TV lights. If you walk to the Desk Zone (in the same room), it turns on the office lamp. It knows your exact coordinates.
🚑 Fall Detection
Safety first.
Ceiling Mount: If you mount it on the ceiling, it can detect if someone falls down and doesn't get up. It can instantly send an alert to family members. This is a potential life-saver for elderly people living alone.
✅ The Pros
- True Presence: Never waves your hands to keep lights on again.
- Multi-Person Tracking: Can track up to 5 people at once.
- Zone Automation: Creates complex logic within a single room.
- Wi-Fi Connected: Does not require an Aqara Hub to work with Alexa/HomeKit.
❌ The Cons
- Wired Power: Must be plugged into a USB outlet (cannot run on batteries).
- Ghosting: Fans or moving curtains can sometimes trigger false positives.
- Setup requires patience to map the room correctly.
🤔 Should you buy it?
YES for living rooms, offices, and bathrooms where you sit still for long periods.
NO for hallways or stairs (standard PIR motion sensors are faster and cheaper for pass-through areas).
See the showdown: Aqara FP2 vs. Philips Hue Motion Sensor