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4. Software Description

This chapter introduces the firmware debugging of HLK-LD2420 and the use of the upper

computer tools.

The HLK-LD2420 is shipped with burned-in system firmware, the firmware version is detailed in

the module package. Hailing Technology provides visualization and configuration software for HLK-

LD2420 hardware, which is convenient for developers to configure HLK-LD2420 parameters

according to the usage scenarios and optimize the sensing effect.

4.1. Firmware Configuration

This section describes how to debug the HLK-LD2420 radar module firmware.

Step 1、The USB to TTL serial adapter board is used to connect the host computer to the radar

module, and the pin connections are shown in Table 4-1 and Figure 4-1. shown in Table 4-1 and

Figure 4-1.

Table 4-1 Correspondence of pins when connecting the radar to the USB serial adapter board

Radar Module

Figure 4-1 Connection between HLK-LD2420 hardware and USB serial port adapter board

Step 2、Open the Device Manager of the host computer and check the serial number of the serial

port where the radar module is located.

Step 3、Open the serial port tool, select the serial port number of the radar module, set the serial

port baud rate to 256000, and then click the "Open Serial Port" button to view the current radar

detection results on the output side of the tool interface.

HLK-LD2420

O_T2

3V3

GND

第 5 页共 14 页

Serial port adapter board

TXD

RXD

VCCIO

GND

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