A
Anonymous
Apr 10, 2026
Rating: 5/5
Low power draw
Great for battery projects. The micro-motion detection is a game changer compared to PIR.
Description
Radar Sensor Module 24GHz Human Micro-Motion Detection Rd-01/03/04 with Onboard Antenna
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Operating Frequency | 24 GHz ISM Band |
| Detection Range | Up to 8 Meters |
| Communication Interface | UART / TTL |
| Operating Voltage | 3.3V - 5V DC |
| Average Current | Approx. 40 mA |
| Antenna Type | Onboard PCB Antenna |
| Operating Temperature | -20°C to +75°C |
| Module Dimensions | 25 x 25 x 3 mm |
| Output Signal | Digital GPIO / UART Data |
| Mounting Type | SMD / Pin Header |
5 reviews
A
Anonymous
Apr 01, 2026
Rating: 3/5
Documentation could be better
Hardware works but the protocol guide was a bit vague. Had to reverse engineer some packets.
A
Anonymous
Mar 02, 2026
Rating: 4/5
Good sensitivity
Works well with ESP32. Had to tweak the sensitivity settings but overall satisfied.
A
Anonymous
Feb 24, 2026
Rating: 5/5
Reliable for occupancy
Deployed 10 units in our office. No false negatives so far. Highly recommend.
A
Anonymous
Feb 17, 2026
Rating: 5/5
Perfect for Smart Home
Integrated this into my lighting system. Detects presence reliably even when sitting still.
5 FAQ
Q: Can I connect multiple modules to one MCU?
A: Yes, provided you have enough UART ports or use a multiplexer for communication.
Q: Is this compatible with 5V Arduino boards?
A: Yes, the module supports 3.3V to 5V input logic levels.
Q: What is the UART baud rate?
A: The default baud rate is 115200, but it can be configured via commands.
Q: Does it penetrate glass or thin wood?
A: It can detect motion through non-metallic thin materials like drywall or wood, but metal will block signals.
Q: Can this sensor detect breathing while sleeping?
A: Yes, it is capable of detecting micro-motions such as breathing within its range.
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