
Ai-thinker previously released Rd-01, the 24G human presence radar sensor module with Wi-Fi and Bluetooth inbuilt. It has received a lot of attention, and many developers are already developing products using these sensor module.
Based on different application requirements, they have now created another 24G human presence radar sensor radar module Rd-03 but this doesn’t have BLE and Wi-Fi.
Rd-03 is a single chip 24Ghz radar sensor module, which greatly reduces the cost without changing the performance and is more suitable for application scenarios where data transfer is not required.
Salient Feature of Rd-03 module:
- 24GHz single radar with high performance antenna.
- High precision identification of human objects in the state of fretting and motion.
- High sensitivity to detect the presence of human body, avoid detecting other objects by mistake.
- The detection range is wide, the angle is ยฑ60ยฐ, and the distance is up to 6.5m.
- High reliability, less affected by ambient environment like light, temperature and humidity.
- Visual software tool for easy configuration of probe parameters.
- Multi-level intelligent parameter adjustment meets more application requirements.
Technical Specification
- Model number: Rd-03
- Package: DIP-5
- Size: 20.0 * 20.0 (ยฑ0.2) mm
- Chip: ICLEGEND MICRO S3KM1110
- Antenna type: on-board antenna
- Spectrum range: 24G~ 24.25GHz
- Operating temperature: -40ยฐ C ~ 85ยฐ C
- Storage Condition: -40 ยฐ C to 125 ยฐ C, < 90%RH
- Power supply voltage 3.0V~3.6V, power supply current โฅ200mA
- Supported interface: UART
- Serial port rate: default 115200 bps
Ai-thinker Rd-03 Pinout


Application Areas
Rd-03 human body radar sensor module can detect and recognize moving, micro-moving, standing, sitting and lying human body. It supports multi-level tuning and can be widely used in various scenarios of AIoT.
Smart Home
The presence and distance of the human body are sensed and the detection results are reported for the main control module to intelligently control the operation of household appliances.
Intelligent Security
Induction access control, building walkie-talkie, electronic cat eye, etc.
Intelligent Lighting
Recognition and perception of human body, accurate position detection, can be used in public places or home lighting equipment such as induction lamp, bulb lamp, table lamp, mirror lamp, etc.
Smart Business
Identify the proximity or distance of human body within the set distance range; Light up the Display in time to keep the device bright when the human is present.
Charging / Parking Monitoring Facilities
Can trigger charging, parking monitoring, wireless charging to prevent human intrusion.
Documentation
- https://docs.ai-thinker.com/en/rd-03
- For any further information, please contact: overseas@aithinker.com
I work as an embedded systems design consultant, helping companies build custom embedded products and develop test automation solutions for their PCBs.
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