HLK-LD016 5.8G radar sensor module

This is a 5.8G low-power radar sensor released by Hilink. The total power consumption is about 20mA, and the module size is 20mm*20mm. The sensor adopts the radar sensor chip solution made in China. The chip fully integrates a 5.8GHz microwave circuit, intermediate frequency amplifier circuit, signal processing circuit, and powerful MCU, with high integration and good production consistency. The periphery is equipped with a miniaturized planar antenna, which significantly reduces the overall size while ensuring the performance of the sensor. Because the sensor has the characteristics of low power consumption, high cost performance, and compliance certification, it has been widely used in intelligent lighting, smart home, and other fields.

Product features:

1) The 5.8G radar sensing module is sensitive; good anti-interference & 30-meter detection range, sensing distance & delay time & light sensing intensity are adjustable.
2) China’s self-developed chip adopts the chip of China’s microwave radar TOP enterprise. It has many years of experience in the industry, vital independent research and development strength, and stable and reliable product performance.
3) Accurate and reliable detection, sensitive and low false alarm rate; integrated 5.8GHz microwave circuit, intermediate frequency amplifying circuit, and signal processor, high integration and good production consistency, equipped with miniaturized planar antennas on the periphery, ensuring module performance while extremely Great reduction in overall size.

HLK-LD016 5.8G radar sensor module specifications:

Basic parameters:

Transmit frequency	5.725-5.875GHz
Transmit power	-5dBm
Input voltage	5V (4.5-5.5V)
Output level	5V high level/0V low level
Working current	~20mA
Sensing distance	0.1-30 meters / hanging height 3 meters (adjustable)
Delay time	15 seconds (adjustable)
Photosensitivity threshold	10Lux (not enabled by default/adjustable)

Other parameters:

Parameter adjustment	Serial port adjustment (*The adjustment serial port is not the output serial port)
Physical dimension	20x20x12mm (with 254*5P header)
Environmental standards	Working temperature: -30~+85℃ Working humidity: 10%-90%RH (non-condensing) Storage temperature: -40~+85℃ Storage humidity: 5%-90%RH (non-condensing)
Certification standards	Meet FCC/CE/RoHS/SRRC certification requirements

Pin parameters:

The module has five signal PINs, VCC, GND, OUT, TX, and RX, and the PIN distance is 2.54mm. You can rewrite the internal parameters through UART if you need to adjust parameters such as distance and delay time. The following table is the definition of each PIN:

PIN name	Functional description	Remark
VIN	Powered by	5V
GND	Grounding	–
out	Signal output	Output high and low level (0/5V)
TX	UART	Performance parameter adjustment or firmware upgrade
RX	UART	Performance parameter adjustment or firmware upgrade

Circuit reference:
Reference circuit 1: The signal output by the module can be directly connected to port 10 of the single-chip MCU, and the single-chip program can read the status of the OUT pin of the module to judge whether there is a moving object in the sensing area, so as to achieve intelligent control.

Reference circuit 2: The high and low levels output by the module drive some switching devices to conduct, such as driving triodes, MOS tubes, relays, etc. As shown in the figure below, when the module detects a moving object, the pin OUT outputs a high level, driving the triode/MOS tube to conduct so that the back-end load (such as lamps, motors, etc.) works.

Schematic diagram of sensing range:
It is configured by modifying the sensing threshold of the software, and its positive limit sensing distance is about 20 meters, and the actual sensing distance can be adjusted as needed.
The dark area in the figure is a high-sensitivity area, which can be detected entirely, and the light-colored area is a low-sensitivity detection area, and objects can be basically detected in this area.

Precautions:
1) During installation, metal shells or parts should be avoided on the front of the antenna to avoid shielding the signal. Blocks such as plastic or glass are allowed, but the blocks should not be close to the front of the antenna;
2) Try to avoid directing the radar antenna directly to large metal equipment or pipelines, etc.;
3) When installing multiple radar modules, try to ensure that the antennas of each radar module are parallel to each other, avoid direct irradiation between antennas, and keep a distance of more than 1m between modules;
4) The radar module should avoid facing the AC drive power supply and try to avoid the rectifier bridge of the drive power supply to avoid power frequency interference with the radar signal.

PC software debugging:
It is used to set and query the radar module’s working parameters and obtain the radar’s working status. (Serial port baud rate 115200)
Key features include:
1) Set the sensing distance of the radar module;
2) Set the lighting time of the radar module;
3) Set the light perception threshold of the radar module;
4) Set the sensor switch of the radar module;
5) Set the switch of the radar light;
6) Support radar setting parameter saving function.