36% under what the other stores charge
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This is a Wi-Fi presence sensor built on the HLK-LD2410B 24 GHz radar module and a Seeed C3 controller, pre-flashed with ESPHome for Home Assistant. Unlike PIR motion sensors, it reports stationary people as well as movement, up to about 20 ft indoors. It runs on USB-C with no battery and keeps everything local, with no cloud account. It suits Home Assistant users who want reliable room-occupancy automations for lights, climate and security; the trade-off against a plain PIR is a USB cable run and some tuning of detection zones.
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Lowest price we've seen: $22.99 on Nov 14 at Amazon; highest $66.95 on Oct 31. Tracked across 4 stores since Oct 31.
Owners of LD2410-based ESPHome sensors generally report solid stationary detection and easy Home Assistant setup, with complaints centered on false triggers and tuning.
This is a compact millimeter-wave presence sensor for Home Assistant. Its radar detects both moving and stationary objects indoors, up to 6 m (20 ft). It comes in a white housing and can be mounted on a wall.
It arrives pre-flashed with ESPHome firmware, so no manual configuration is required. It connects over Wi-Fi through an external antenna on the Seeed C3 controller. It is powered through USB-C and needs no batteries.
The sensor works with Home Assistant for local control and automation, such as lighting, climate and security. It does not depend on the cloud, and its data stays on your local network.
