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.