LD2410B mmWave Human Presence Sensor

The LD2410B is a human presence sensor module from Hi-Link’s 24GHz millimeter wave radar series. It detects both moving and stationary people, including someone sitting still at a desk or on the couch. That makes it far more reliable than PIR for room occupancy. Key Features: Detects moving and still human presence, reporting distance and signal strength for each. Detection range up to ~6 meters, with ±60° coverage. Up to 9 configurable distance gates (0.75m each), each with its own motion and stillness sensitivity thresholds. Built-in Bluetooth for optional tuning from Hi-Link’s HLKRadarTool app. Connects directly to the 2410 header on the Hat. Tune sensitivity, gate thresholds, and presence timeouts within the Sat1 firmware.