Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Frequency | 10.525 GHz |
| Detection Range | 0 - 15 cm (Adjustable) |
| Output Interface | UART Serial / GPIO |
| Supply Voltage | 3.3V DC |
| Current Consumption | < 40 mA |
| Beam Angle | 60 degrees horizontal |
| Response Time | < 50 ms |
| Operating Temperature | -20°C to +70°C |
| Dimensions | 25mm x 18mm x 4mm |
| Mounting Type | PCB Solder Pin |
Anonymous
Mar 24, 2026
Rating: 4/5
Great for student projects
Bought five of these for a university robotics class. Students found them easy to wire up. One unit had a slightly noisy signal, but the other four were perfect. Good bulk pricing.
Anonymous
Mar 21, 2026
Rating: 5/5
Perfect for touchless projects
This radar module works exactly as described. The hand sweep detection is very responsive and the serial output makes it easy to integrate with my Arduino project. Great sensitivity adjustment.
Anonymous
Mar 19, 2026
Rating: 5/5
Reliable near-field trigger
I used this to replace a physical button on a kitchen appliance. The non-contact feature is hygienic and the module has been running 24/7 without issues. Highly recommended for IoT devs.
Anonymous
Mar 18, 2026
Rating: 5/5
Compact and powerful
The form factor is incredibly small which helped fit it into a tight enclosure. Detection is consistent even with different hand sizes. The IO output option is a nice bonus.
Anonymous
Mar 15, 2026
Rating: 5/5
Exceeded expectations
I was skeptical about the 10GHz performance at this price point, but it delivers. The wave trigger is smooth and false positives are minimal if mounted correctly. Will buy again.
Anonymous
Mar 15, 2026
Rating: 4/5
Good value but needs calibration
Solid sensor for the price. It took a little time to tune the potentiometer for the exact range I wanted, but once set, it ignores background motion well. Documentation could be slightly better.
Q: Can this sensor detect motion through plastic or glass?
A: Yes, the 10G radar waves can penetrate non-metallic materials like thin plastic or glass, allowing the sensor to be hidden behind a panel for a seamless look.
Q: Does this module emit continuous waves or pulses?
A: The LD102 utilizes Continuous Wave (CW) Doppler radar technology to detect movement based on frequency shifts caused by hand sweeping motions.
Q: Is there a library available for ESP32 integration?
A: While we do not provide an official library, the UART protocol is standard. Many users have shared open-source ESP32 examples on GitHub that work seamlessly with the LD102.
Q: How do I adjust the detection distance?
A: There is a small trimmer potentiometer on the back of the module. Rotating it clockwise increases the range, while counter-clockwise decreases it. Use a non-conductive screwdriver for adjustment.
Q: What is the logic level of the GPIO output?
A: The GPIO output operates at 3.3V logic levels. If you are connecting to a 5V microcontroller, please use a logic level converter to ensure safe operation.
Thickened Felt Calligraphy Mat - Specialized Cloth for Brush Writing, Chinese Painting Practice, and Grid Desk Padding
$5.61
Dashan Colored Paper Calligraphy Felt Mat Traditional Chinese Painting Practice Mat for Beginners Ancient Style Desk Pad
$15.78
MAIKE Outdoor Waterproof Dry Bag - Foldable Bucket Pack for Diving, Snorkeling, Swimming, Rafting, and Surfing
$10.90
Cinnabar Liquid Rooster Comb Blood Daoist Bletilla Natural Raw Ore Water-Floated Cinnabar Powder Ink for Calligraphy and Painting
$4.53
Goat Hair Flat Wash Brush Background Wash Brush for Fine Line Traditional Chinese Painting Base Color Background Wool Brush Gouache Watercolor Oil Painting Soft Bristle Row Brush
$4.25
Pre-sale Litin The Husky and His White Cat Shizun: Past and Present Life Badge & Colored Paper Set (Mo Ran & Chu Wanning)
$24.00
Hot-Selling Street Fair and Temple Fair Toy Source - Wooden Puppet Rattle Drums, Cartoon Wooden Man Shakers
$1.50
Air Source Heat Pump Water Heater for Commercial and Home Heating by AMA Shengneng
$8,400.00
Waterproof Dry Bag for Outdoor Rafting and River Trekking - Wet/Dry Separation Storage for Swimming, Fitness, Beach, and Sand Activities
$8.42
Maichuang Continuous Peanut Roasting Machine - Electromagnetic Drum Roaster for Soybeans, Large-Scale Production Line Equipment
$2,356.00
Free Shipping: Colorful Cartoon Hand-Crank Drum Puppet Toy for Kids – Perfect for Street Markets and Temple Fairs
$64.00
Flower Doctor Balcony Vegetable Growing Box - Family Vegetable & Strawberry Planter, Rooftop Rectangular Plastic Flower Pot
$38.09
Miracle-Gro Organic Potting Soil for Balcony Gardens, Vegetables, Green Plants, Flowers, and General Home Gardening, 40L
$195.98
Silicone Drainage Mat for Faucet Side - Splash-Proof Pad for Kitchen Sinks and Bathroom Countertops
$3.57
Complete Dairy Processing Equipment: Yogurt Sterilization Fermentation Tank and Raw Milk Cooling Tank for Farms
$17,836.00
50x80mm Biggest Size Professional Rectangular Photosensitive
$75.62
Rose poem "Fox" Fabric Fragrance Spray
$3.15
Nangong Wenfang Healing Beautiful Words Calligraphy Copybook Small Regular Script Brush Tracing Transparent Cards for Women's Practice Entry-Level Elegant Fonts
$49.00
2025 New Cute Puppy Large Capacity Portable Travel Toiletry Bag, Handheld Makeup Organizer
$9.59
Cylindrical Granule Making Equipment Rotary Granulator for Rice Flour and Tartary Buckwheat Tea
$400.00
Face Painting Sponge Kit - Teardrop and Half-Round Magic Sponges for Base, Gradient, and Quick Designs
$2.11
Nutrient Soil and Submerged Hydroponic Clay Pebbles - Backfill for Bathrooms, Planters, and Soil-Free Green Plants
$18.40
Wenmo 100% Cotton Watercolor Paper 2026 Wall Calendar/Monthly Planner 300g DIY Calendar Sheet Sketch Marker Compatible
$17.70
Self-Priming Soybean Meal Corn Crusher Vertical Feed Mixer 1-Ton Feed Crushing & Mixing Integrated Machine
$6,650.00
Invisible Retainer Storage Case - Compact, Portable, Leak-Proof Soaking Box for Orthodontic Aligners
$18.10
Outdoor Travel Storage Shockproof Deep Waterproof Case with Cushioning for Mobile Electronics Emergency Parts EDC Tool Kit
$16.00
Guangxi Soilless Cultivation Ceramsite Substrate for Orchids and Green Plants - Lightweight Stone 5-30mm, Multiple Sizes Available for Hydroponics
$7.70
Deuter Germany Imported Waterproof Dry Bag - Ultra-Light Roll-Top Storage for Outdoor Clothing, Rafting, and Swimming
$102.00
Qingzhu Paper Blending Stump Set, Sketching Paper Stumps, Professional Large Size for Art Students, 3-Pack
$2.98
Water Curtain Spray Booth – Water Circulation Paint Mist Purifier, Eco-Friendly Stainless Steel Equipment
$773.00
![[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)
