product manual

PRODUCT DESCRIPTION

HLK-LD306-24G Internet of Things millimeter wave radar module, which can be used to detect the speed of vehicle movement. It can continuously report vehicle speed information through the serial port, and is not affected by temperature, humidity, airflow, dust, noise, brightness, etc. Strong anti-interference ability, can penetrate acrylic, glass, plastic and other thin non-metal materials.

*The interface is a 5pin terminal with a lock with a pitch of 2.54mm

product features

letter of agreement

Communication configuration

485 serial port, default baud rate 9600, data bit 8, stop bit 1, no check bit. The module defaults to automatic reporting mode, which continuously reports the driving speed of the vehicle when it is powered on.

Communication format

A. Uplink data (send by module)

*the data shows

Report data information, the reporting interval can be set 60ms-2s, the default is 400ms, the word valve analysis is as follows
-Length: the number of bytes except the frame header and check byte, 0×0A, fixed byte;
-Address: 0×D3, fixed byte;
-Speed: The unit is km/h, which occupies 2 bytes, with the high order first;
-Debugging data: target debugging information, occupying 6 bytes;
-Check: Sum check, all bytes except check word threshold are sum, and the lower 8 bits are taken, occupying 1 byte.

A. Downlink data (module receiving)

*the data shows

Frame header: fixed 2 bytes, 0xBAAB
-Address: 0x00, fixed byte;
-Command number: Set parameter command number, occupying 1 byte;
-Command parameter: set the parameter value, occupying 2 bytes;
-Check: No check, 0x00, fixed byte;
-End of frame: fixed 2 bytes, 0x55BB;
-Return after successful setting: 0D 0A 77 72 69 74 65 20 6F 6B 0D 0A
That is, the ASII code "Enter + write ok + Enter"
*See the specification for the parameter setting command table

Module dimensions

Precautions

* The module detects relative moving objects in the area, and completely stationary objects are not detected. The output result is information such as the speed of the nearest/fastest target moving relative to the detection area. * By default, continuous automatic reporting (protocol 7), if you need query mode, set the protocol type to 6, and send a hexadecimal query (55 5A 02 D3 84) command. * If the module is designed with a shell, the distance between the radar antenna surface and the shell surface is 6mm. The thickness of the shell is about 2~3mm. The shell material cannot use metal or metal-plated paint. It is recommended to use PC, plastic, steel, etc., on the back of the antenna Use metal materials.

Install the app

*Speed measuring radar installation instructions
-Installed on the side of the road with a height of 2 meters, the radar is perpendicular to the road, and the detection range is shown by the dotted area in the diagram; -When installed in a billboard or at a height of 6 meters, such as an overpass, tilt the radar 3 degrees toward the road.