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Home / Computer Hardware, Monitors & Peripherals / Original Genuine LD2420-24G Millimeter Wave Radar Human Micro-Motion Detection Module Smart Sensor

Attributes

Brand -
Category Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin -
Operating Frequency 24GHz ISM Band
Max Detection Range 5 Meters
Communication Interface UART TTL
Supply Voltage 5V DC
Working Current 45mA (Typical)
Detection Angle 120 Degrees
Output Protocol Custom UART
Module Dimensions 25 x 25 x 4 mm
Operating Temperature -20°C to 60°C
Mounting Type PCB Soldering

5 reviews

A

Anonymous

Apr 12, 2026

Rating: 4/5

Good sensor, tricky setup

Hardware works well. Documentation for the protocol could be more detailed for beginners.

A

Anonymous

Apr 04, 2026

Rating: 3/5

Range is limited

Works as described but 5 meters is optimistic in cluttered rooms. Good for small spaces.

A

Anonymous

Feb 12, 2026

Rating: 5/5

Better than PIR

Finally a sensor that detects presence without large movements. Very reliable.

A

Anonymous

Jan 30, 2026

Rating: 5/5

Genuine product

Checked the chip markings. Works exactly like the official specs. Fast shipping.

A

Anonymous

Jan 21, 2026

Rating: 5/5

Perfect for ESPHome

Integrated this into my smart lighting system. The micro-motion detection prevents lights from turning off while I'm reading.

5 FAQ

Q: Is firmware updateable?

A: Yes, via the UART interface using the official configuration tool.

Q: Is this compatible with Arduino?

A: Yes, it communicates via UART so it works with Arduino, ESP32, and ESP8266.

Q: Does it require external antenna?

A: No, this module has a built-in PCB antenna ready for use.

Q: What logic level is the UART?

A: The UART TX pin is 3.3V logic level. Ensure your MCU is compatible.

Q: Can it detect motion through glass?

A: Yes, mmWave signals can penetrate non-metallic materials like glass and thin wood.

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