LD2410 24GHz Human Presence Sensing Module

Q: <h3>Does millimeter wave technology have any impact on the health of users?</h3>

Current research and main conclusions show that millimeter wave signals are not harmful to human health. Millimeter wave signals are higher in frequency and lower in energy, so they are less likely to cause harm to the human body. In addition, the radiation power of 5G millimeter wave technology is very low, far below the limit value of international standards, and will not generate heat radiation.

Q: <h3>What is millimeter wave?</h3>

As the name suggests, millimeter waves are electromagnetic waves with a wavelength (λ) of about 1 millimeter (more precisely, 1 to 10 millimeters). By using the formula f = c/λ, where c is the speed of light (3E8 m/s), the wavelength can be converted into a frequency range of 30-300 GHz. The millimeter wave frequency band has been designated as the "extremely high frequency" (EHF) band by the International Telecommunication Union (ITU). The term "millimeter wave" is also commonly abbreviated as "mmWave".

Q: Is there an arduino library for this product? Does this library work with it? <a href="https://github.com/DFRobotdl/DFRobot_mmWave_Radar" rel="nofollow noopener" title="https://github.com/DFRobotdl/DFRobot_mmWave_Radar">https://github.com/DFRobotd...</a> Most importantly, is there a way to adjust the sensitivity parameters from a sketch?

Hi. can we put plastic or something in front of it like 3d printed "clear" opal filament?

1. Getting Started

This article offers a detailed guide on installing radar modules, highlighting the necessary installation conditions, environmental requirements, and precautions to ensure effective performance and accurate detection.

2. Example Code for Arduino-Read Detection Distance

The following tutorial will guide you through quickly using and acquiring sensor data on the Arduino platform, using the UNO R3 as an example.

Reference

Parameter	Value
Nominal Voltage	5V
Operating Frequency Range	24GHz-24.25GHz
Modulation Mode	FMCW
Operating Voltage	DC5V-12V
Average Operating Current	80mA
Detection Distance	0.75m-6m (measured blind zone distance of 30cm)
Detection Angle	±60°
Output Interface	UART & GPIO (3.3V)
Default Baud Rate	57600（Best 256000）
Distance Resolution	0.75m
Sweep Bandwidth	250MHz
Ambient Temperature	-40 to 85℃
Dimension	7mm×35mm/0.28×1.38"
Connector	SH 1.27mm to DuPont Female 2.54

Wire Color	Name	Description
Blue	OUT	Object status output, human is detected: output high (3.3V); nobody is detected: output low (0V)
Green	UART_Tx	Serial Tx, transmit data
Yellow	UART_Rx	Serial Rx, receive data
Black	GND	Power ground
Red	VCC	Power input

LD2410 24GHz Human Presence Sensing Module

Specification

Pinout

Does millimeter wave technology have any impact on the health of users?

What is millimeter wave?