hlk-ld2410b's Introduction

HLK-LD2410B Python Demo

This is a simple Python demo for HLK-LD2410B 24 GHz Radar Sensor (http://www.hlktech.net/index.php?id=1183). You can also try the app from HLK or the official PC demo. This code uses the serial port to communicate with the sensor.

Prerequisites

You need the following hardware to run this demo:

Linux PC (tested with Ubuntu 22.04)
HLK-LD2410B 24 GHz Radar Sensor
USB to TTL Adapter
1.5 mm 5-pin cable

Connect the sensor to the USB to TTL adapter:

GND to GND
5V to 5V
RX to TX
TX to RX

Install the required packages:

pip3 install -r  requirements.txt

Get started

read_serial.py prints out the received data from the sensor (x, y, speed, distance resolution) of three targets:

python3 print_targets.py

plot_targets.py plots the received data from the sensor (x, y) of three targets:

python3 plot_targets.py

Troubleshooting

Check that the USB to TTL adapter is connected to the correct port:

dmesg | grep tty

Notes and Disclaimer

Currently only the serial protocol for basic mode is implemented and not the engineering mode.
Not all commands of of the documentation are implemented yet (2.2.3, 2.2.4, 2.2.7, 2.2.8, 2.2.9, 2.2.10, 2.2.11, 2.2.12 and 2.2.13 are missing)
Not all messages are received properly via UART. The most significant bit (MSB) is sometimes often set to 1 (e.g. 0x80 instead of 0x00). This is not handled in this implementation and can lead to wrong results or wrongly interpreted responses.
There seems to be some outliers in the data which are not filtered in this implementation

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