XIITIA 4pcs LD2401 Human Presence Radar Sensor Module HLK-LD2401 LD2401 Millimeter Wave Non-Contact 24GHz ISM Band Serial Port IO Level Output

["★The LD2401 is a 24 GHz millimeter-wave radar module designed for human presence detection. It operates by using FMCW (Frequency-Modulated Continuous Wave) technology to detect human targets within a defined space. Combined with radar signal processing and precise human detection algorithms, it achieves highly sensitive human presence detection. The module can identify humans in both moving and stationary states and calculate auxiliary information such as the target’s distance.","★If the radar requires an enclosure, the enclosure must have good wave-transmitting properties in the 24 GHz frequency band and must not contain metal or materials that shield electromagnetic waves;","★The presence of non-human objects in constant motion within the detection area, such as animals, continuously swaying curtains, or large potted plants directly facing the airflow. · The presence of large, highly reflective surfaces within the detection area; highly reflective objects directly facing the radar antenna will cause interference. · When mounting on a wall, external interference factors such as air conditioners and electric fans on the ceiling must be taken into account.","★Ensure that there are no moving objects or vibrations behind the radar. Because radar waves are penetrating, the antenna’s rear lobe may detect . A metal shielding cover or metal backplate can be used to shield the rear lobe, thereby reducing the impact of objects behind the radar. · When multiple 24 GHz band radars are present, do not align their beams directly; install them as far apart as possible to avoid potential mutual interference.","★Applications: The product is suitable for a wide range of AIoT scenarios, including smart lighting control, digital signage activation, personal safety protection, energy-saving smart home appliances, and security intrusion detection."]