Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Frequency | 24 GHz ISM Band |
| Detection Range | 0.5m to 8m (Adjustable) |
| Communication Interface | UART / Bluetooth 5.0 BLE |
| Supply Voltage | 3.3V DC ±5% |
| Current Consumption | < 15mA (Active Mode) |
| Beam Angle | ±45° Horizontal, ±30° Vertical |
| Microcontroller | Integrated High-Performance MCU |
| Operating Temperature | -40°C to +85°C |
| Dimensions | 26mm x 20mm x 2.5mm |
| Application Scenario | Smart Lighting, HVAC Control, Security Systems |
Anonymous
Mar 30, 2026
Rating: 5/5
Reliable presence detection
Unlike standard PIR sensors, this millimeter-wave radar detects stationary humans effectively. I used it to control my office AC, and it no longer turns off while I'm sitting still at my desk. Highly recommended.
Anonymous
Mar 24, 2026
Rating: 5/5
Best in class for 24GHz
I have tested several modules in this category, and the LD2401 offers the best balance of performance and ease of use. The multi-target detection capability is impressive for such a compact module.
Anonymous
Mar 20, 2026
Rating: 5/5
Easy integration with ESP32
Connected this directly to an ESP32 using the TX/RX pins. The protocol is straightforward, and the data output is consistent. The ability to update firmware over Bluetooth is a nice bonus feature.
Anonymous
Mar 15, 2026
Rating: 4/5
Compact and powerful
Very small footprint which fits perfectly inside my custom switch boxes. Detection range is accurate as advertised. Only giving 4 stars because the antenna orientation matters quite a bit for optimal performance.
Anonymous
Mar 11, 2026
Rating: 4/5
Great value but needs careful calibration
The hardware quality is solid for the price. Initially, it had some false positives near a vibrating fan, but after tweaking the sensitivity parameters via UART, it works flawlessly. Documentation could be slightly more detailed.
Anonymous
Mar 02, 2026
Rating: 5/5
Perfect for Smart Home Automation
This sensor is incredibly sensitive and accurately detects even subtle movements like breathing. The Bluetooth configuration app made setting up detection zones a breeze. Integrated it into my living room lighting system successfully.
Q: Does this module come with a casing or is it just the bare PCB?
A: This product is sold as a bare PCB module intended for integration into other devices or enclosures. It does not include a plastic housing, but the pin headers are pre-soldered for easy prototyping.
Q: Is there a Python library available for parsing the UART data?
A: Yes, the community has developed several open-source Python libraries for parsing LD2401 data streams. You can find them on GitHub by searching for 'LD2401 Python'. We also provide a basic protocol document in the download section.
Q: Can this sensor detect people through a thin wooden door?
A: While millimeter-wave radar can penetrate non-metallic materials to some extent, performance depends on material thickness and density. For reliable operation, we recommend line-of-sight installation or mounting where the signal does not need to pass through solid obstacles.
Q: What is the maximum number of targets this module can track simultaneously?
A: The LD2401 can typically distinguish and track up to 3 separate moving targets within its field of view, depending on their separation distance and the configured sensitivity settings.
Q: Can I power this directly from a 5V Arduino pin?
A: No, the module operates at 3.3V. Connecting it directly to a 5V source may damage the sensor. Please use a 3.3V regulator or a logic level converter if your microcontroller operates at 5V.
Compact Manual Hot Stamping Machine for Logos, Business Cards, Leather Wallets, Plastic, and Wood - Heat Embossing and Branding Tool
$500.76
DIY Handmade Soap Mold – Single Square Silicone Mold for Homemade Soap
$1.96
Wall-Mounted Facial Towel Dispenser Transparent Upside-Down Design
$4.50
Colorful Ground Thread Inserts 16ER/IR1.0/2.0/3.0/3.5 ISO AG55/60 for High-Hardness Quenched Steel
$19.80
Jiuzheng Tongming Submerged Solenoid Pulse Valve TMF-Y-25/40/50/62/76S, Dust Removal Pulse Blowing Valve
$150.00
Large Water Bucket Stand – Storage Rack for Office Purified Water Dispensers and Mineral Water Containers
$282.56
Double Loop Chain Lifting Sling, Manganese Steel Double-End Ring Hoisting Chain, G80 Manganese Steel Lifting Rigging 1/2/3/5T
$98.00
Hesdige JG-376 Portable Stone Removal Hook - Multi-Function Tool for Cleaning Gravel from Car Tire Treads
$16.91
Used 90% Condition Removed Car Tires 165 175 185 195 205 215 225 235/50 55 60 65 R13 14 15 16 17
$68.00
Blower Assembly AC Motor Fan for Changan CS75, Raeton CC, Oshan A800, and CS35 - Original Equipment
$427.73
Professional Sketch Blending Knife - Gray Tone Sponge Blender for Details and Highlights - Art Exam Tool
$2.90
Yuanzhi Water Bucket Rack 3/4/5 Tier Single Row with Board V-Shaped Water/Paper Cup Pure Mineral Water Bucket Storage Stand
$143.00
Rubber Wheel Chock 460x180x160 Anti-Slip Triangular Wedge
$354.33
Household Small Range Hood Portable USB Desktop Smoke Extractor for Living Room Hot Pot BBQ Odor Removal Mini Fume Extractor
$39.00
Household Water Dispenser Stand - Multi-Tier Floor Rack for Bottled Pure Water and Mineral Water in Offices
$129.74
WYPALL* Microfiber Cleaning Cloths Yellow 83610, 6 Sheets/Pack * 4 Packs/Case
$132.76
Ceramic Ink Dish, Water Dish, Brush Rest, Ice-Crack Ink Box, Multi-Function Brush Washer, Ink Stone, Brush Holder, and Kung Fu Tea Cup
$1.90
Car Tire Stone Removal Hook, Foldable and Extendable Tool for Extracting Pebbles from Treads
$2.07
Touchscreen Waterproof Phone Pouch for Swimming and Rafting, Sealed Bag for Beach, Sand, Snorkeling, and Underwater Photography
$5.53
Chunfei Grocery Store Yunan GR02 Gravel Bike, Thru-Axle, Mechanical Disc Brakes, Lightweight Touring Setup with Multiple Rack Mounts
$6,441.00
Electric Guitar Tutorial for Beginners - 7-Week Self-Study Plan with Exercises, Corrections, and Materials
$219.00
Professional Bathtub-Style Brush Washing Set - Cute 3-Piece Watercolor and Chinese Painting Brush Cleaner with Palette
$11.80
![[Sold Out & Discontinued - Display Only] Radish Defense ABO20.0 Spring Tour Series Blind Box Figure](https://www.gosteppe.com/cache/small/product/269201/legacy-main-5af4651a8d30dc42d9412600.png)
[Sold Out & Discontinued - Display Only] Radish Defense ABO20.0 Spring Tour Series Blind Box Figure
$16.90
Ebru Marbling Plastic Tool Kit – Needles, 3-Prong Combs, Cones, Straws, and Droppers for Peacock Patterns
$1.28
CANDLE.LAB | Silicone Border Mat for DIY Scented Candles and Soap Making Tray Mold
$32.00
Shiji Runde Coal Shed Mine Dust Removal Explosion-Proof Anti-Freezing Fog Cannon Port Dust Suppression 80m Ultra-Fine Industrial Fog Machine
$4,180.00
Mobile Retractable Spray Booth for Furniture - Foldable Track-Mounted Painting Room
$6,240.00
Long Handle Bristle Paint Brush - Hog Hair Brush for Oil Painting, Acrylic Wall Art, and Children's Drawing
$1.80
Electrostatic Powder Coating Equipment and Electronic Powder Dispenser Supply
$17,250.00
DIY Toast-Shaped Silicone Mold for Handmade Soap - Square Soap Making Mold
$105.00
![[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set](https://www.gosteppe.com/cache/medium/product/208273/legacy-main-9ec245ebf781f65a434ba854.webp)
