A
Anonymous
Apr 12, 2026
Rating: 5/5
Compact and Powerful
Small footprint fits easily into my junction boxes. Very responsive.
Description
24GHz Human Presence Radar Sensor Module, 9-Meter Detection Range
Reviews
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
A
Anonymous
Apr 12, 2026
Rating: 5/5
Perfect for Home Assistant
Works flawlessly with ESPHome. Detects presence even when sitting still.
A
Anonymous
Mar 26, 2026
Rating: 4/5
Great sensor, tricky config
Hardware is solid. Configuration took some time to get the sensitivity right.
A
Anonymous
Mar 24, 2026
Rating: 5/5
Reliable Detection
Been running for 3 months without false negatives. Highly recommend.
A
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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