4-in-1 mmWave Presence Sensor
Temperature, Humidity, Illuminance & Human Presence in One Device
This is a 4-in-1 sensor that combines temperature, humidity, illuminance, and human presence detection. It uses the HLK2401 mmWave module to detect both moving and stationary people, making it more reliable than traditional PIR sensors for room occupancy.
Key Features
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4-in-1 sensing: temperature, humidity, illuminance, and human presence
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mmWave technology detects moving and stationary people
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6 m detection range, ±60° (Best accuracy within 5 m and facing the sensor directly)
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Auto provision for fast Wi-Fi connection
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Works with MQTT and Home Assistant
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Auto Tuning, False Alarm Analysis, and Engineering Mode for radar optimization
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Array Sensor support: multiple sensors appear as one unified sensor in Home Assistant
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Manual calibration for temperature, humidity, and illuminance
Why mmWave?
Traditional PIR sensors detect movement through heat changes. When a person is still, PIR sensors may not detect them. mmWave sensors can detect small movements, such as breathing or slight body motion, so they can recognize a stationary person. However, this also makes them more sensitive to environmental interference. This sensor provides detailed radar settings so you can tune performance for your actual room.