Attributes

Brand	-
Category	Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin	-
Frequency Band	24GHz ISM
Model Number	LD2412
Detection Range	0.5m to 12m
Communication Interface	UART TTL
Operating Voltage	5V DC
Peak Current	85mA
Antenna Type	On-board PCB Antenna
Field of View	120° Horizontal
Module Size	25 x 25 x 3 mm
Protocol Support	ESPHome, Home Assistant

5 reviews

Anonymous

Apr 12, 2026

Rating: 5/5

Compact and Powerful

Small footprint fits easily into my junction boxes. Very responsive.

Anonymous

Apr 12, 2026

Rating: 5/5

Perfect for Home Assistant

Works flawlessly with ESPHome. Detects presence even when sitting still.

Anonymous

Mar 26, 2026

Rating: 4/5

Great sensor, tricky config

Hardware is solid. Configuration took some time to get the sensitivity right.

Anonymous

Mar 24, 2026

Rating: 5/5

Reliable Detection

Been running for 3 months without false negatives. Highly recommend.

Anonymous

Jan 24, 2026

Rating: 5/5

Better than PIR

Finally a sensor that knows I'm in the room reading. No more lights turning off.

5 FAQ

Q: Does this work through walls?

A: No, millimeter-wave radar cannot detect through metal or thick concrete walls.

Q: What firmware does it use?

A: It comes with standard Helingke firmware, customizable via UART commands.

Q: Can it detect breathing?

A: Yes, it can detect micro-movements associated with breathing for presence validation.

Q: Is a case included?

A: No, this is a bare module. You will need to design or purchase a separate enclosure.

Q: Is 3.3V logic supported?

A: The UART interface is 5V TTL. Use a level converter for 3.3V MCUs.

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