Introduction HLK-LD1115H is a high sensitivity 24GHz millimeter wave human presence detection radar module. The main feature of this module is that on the basis of the function of the traditional human body induction radar, it also has the function of judging the existence of the human body by detecting and accumulating small movements such as human breathing. Therefore, the presence detection within a certain range has higher accuracy and is not easy to miss. Color as shown material:PC+Metal Specifications Frequency 24G-24.5GHz Modulation method CW Detection distance 4m static human presence detection, 16m motion detection Range hanging height , static body detection coverage radius 2m, mobile detection radiusGreater than 5m Power supply 3.6-5V Current 70mA Output serial level 3.3V Detection cycle adaptive Antenna half power angle horizontal ±57°, vertical ±24° (see the figure below for the definition of antenna horizontal/vertical direction) Data format Serial port ASCII output/high and low level Startup time about 15 seconds Package Contents: 4pc 24GHz millimeter wave human presence detection module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.