Shenzhen Hi-Link ELectronics Co.,Ltd
User Manual
HLK-LD2410
5
Pin
Symbol
Name
Function
1
OUT
Target status
output
Human presence detected: output high level
No human presence: output low level
2
UART_Tx
Serial port Tx
Serial port Tx pin
3
UART_Rx
Serial port Rx
Serial port Rx pin
4
GND
Power ground
Power ground
5
VCC
Power input
Power input
5V (acceptable 5V ~ 12V voltage power supply)
Table 1 Pin Definition Table
5.Usage and Configuration
5.1 Typical Application Circuit
The LD2410 module directly outputs the detected target state through an IO pin (high level
when there is someone, low level when there is no one), and can also output the detection result data
through the serial port according to the specified protocol. It includes target status and distance
auxiliary information, etc., which can be used flexibly by users according to specific application
scenarios.
The module IO level is 3.3V. The default baud rate of the serial port is 256000, 1 stop bit, no
parity bit.
5.2 The Role of Configuration Parameters
The user can modify the configuration parameters of the module through the serial port of the
LD2410 to adapt to different application requirements, and the configuration content will not be lost
when the power is turned off.
The configurable parameters include the following:
Farthest detection distance
If the farthest detectable distance has been set, only human objects that appear within the
farthest distance will be detected and the result will be output.
If set in units of distance gates, each distance gate is 0.75m.
Including the farthest door for motion detection and the farthest door for static detection, the setting
range is 1- 8m. If the farthest door is set to 2, only if there is a human body within 1.5m will it be
effectively detected and output the result.
Sensitivity
Only when the detected target energy value (range: 0~100) is greater than the sensitivity value
will it be determined that the target exists, otherwise it will be ignored.
The sensitivity value can be set from 0 to 100. The sensitivity of each range gate can be
independently set, so that the detection in different distance ranges can be precisely adjusted, local
accurate detection or filtering of interference sources in specific areas.
In addition, if the sensitivity of a certain distance gate is set to 100, the effect of not recognizing
