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Standard PIR motion sensors miss a lot of real presence — someone sitting still at a desk stops triggering a PIR sensor within seconds. Presence detection technology fixes exactly that gap.
mmWave sensors: the most accurate stationary-presence detection
mmWave radar sensors detect genuine presence even when someone is sitting still, solving PIR’s biggest weakness for rooms like offices or living rooms where “motion” isn’t the right signal to watch for.
- [Installation Method] With the new installation method for the FP2, you can now mount it in the corner of a room. Just attach t…
- [Multi-Person &Zone Positioning] The Aqara Presence Sensor FP2 can simultaneously detect up to 5 people and trigger different s…
- [Sleep monitoring& Fall Detection] You can install FP2 next to the bed and select the sleep monitoring mode to sense the human…
Ultrasonic sensors: a cheaper middle ground
Ultrasonic presence sensors improve on basic PIR without the cost of mmWave, a reasonable compromise for rooms where perfect stationary detection matters less.
- 【Home Assistant Required】Works only with Home Assistant, an open-source smart home platform for local control and automation. H…
- 【Advanced Radar Sensing】Uses millimeter-wave radar to detect both moving and stationary objects up to 20 ft (6 m) indoors. Offe…
- 【Compact, Plug-and-Play Design】Built with the HLK-LD2410B radar module and Seeed C3 controller featuring an external Wi-Fi ante…
BLE presence via phone proximity
Bluetooth-based presence detection tracks phones directly, which is useful for whole-home “is anyone here” logic even though it can’t detect room-level stationary presence the way mmWave does.
- The ESP32-C3 SuperMini Development Board is an ultra-compact IoT board based on the ESP32-C3 Wi-Fi/Bluetooth dual-mode chip. Wi…
- Ultra-Compact Design:Single-sided surface mount design, making it easy to integrate into space-limited embedded devices; Lightw…
- Powerful Core Performance:Equipped with a 32-bit RISC-V CPU clocked at up to 160 MHz, supporting floating-point operations (FPU…
mmWave is worth the extra cost for any room where PIR’s motion-only detection has caused real automation problems — lights turning off while someone is sitting still being the classic complaint.