Ai- Thinker Ai-Thinker Rd-03D

Description:

The Rd-03D is a radar module created by Ai-Thinker, featuring the S5KM312CL chip. This chip is a microcontroller-based millimeter wave sensor SoC utilizing FMCW radar transceiver technology. Operating in the 24 GHz K-band, the Rd-03D has a maximum sweep bandwidth of 0.25GHz. It employs advanced FMCW waveform signal processing and the S5 series chip, along with MCU radar signal processing and an intelligent positioning and tracking algorithm. This enables the detection of multiple targets within a designated area and the real-time reporting of results, facilitating the rapid development of target positioning and tracking products.

The Rd-03D module precisely detects human presence and movement within a region, incorporating intelligent algorithms for motion trajectory recognition and tracking. It also performs speed measurement and ranging of targets, offering quick recognition and low power consumption. Easily configurable, the Rd-03D is ideal for various public facilities, capable of discerning human movement, slight motion, and stillness, thereby controlling equipment switches. Moreover, the module is robust against external interference and unaffected by wireless signals, including WIFI.

Specifications:

• Model: Rd-03D
• Package: Standard 1*4P-1.25mm socket connector
• Size: 15.0*44.0(±0.2)mm
• Antenna: on-board PCB antenna
• Frequency 24G ~24.25GHz
• Working Temperature: -40°C ~ 85°C
• Storage Temperature: -40°C ~ 125°C, 90%RH
• Power Supply: Support voltage 5V, supply current >=200mA
• Interface UART
• UART Rate: Default 256000 bps

Features:

• Adopts standard 1*4P-1.25mm socket connector
• Radar support 24 GHz ISM frequency band
• High performance 1T2R antenna
• Accurate target positioning and tracking
• MAX sensing distance is 8m
• The range resolution is 0.75m, the ranging accuracy is 0.15m
• Detection range azimuth Angle ±60°, pitch Angle ±30°• Wall mounting
• Provides a visual tool to configure the tracking detection range, data reporting interval, andtarget retention time
• Ultra-small module size: 15*44mm
• Automatically loads default configuration, plug and play
• Support UART, you can use the serial port to realize radar intelligent parameter adjustment, convenient and fast
• 5V single power supply

Package Included:

1 x Ai-Thinker Rd-03D

Datasheet:

Ai-Thinker Rd-03D Overview

The Ai-Thinker Rd-03D is a compact 24 GHz FMCW radar module based on the S5KM312CL mmWave sensor SoC. It features integrated MCU signal processing and an on-board PCB antenna to detect and track multiple targets in real time, making it ideal for presence and motion-sensing applications.

Key Features of Ai-Thinker Rd-03D

• S5KM312CL chip-based FMCW radar SoC for accurate distance and motion detection
• 24 GHz–24.25 GHz K-band operation with up to 0.25 GHz sweep bandwidth
• On-board PCB antenna and 1×4-pin 1.25 mm socket connector for easy integration
• UART interface at default 256000 bps; supports standard 5 V power supply (≥200 mA)
• Wide operating temperature range from –40 °C to +85 °C
• Genuine product with fast shipping from Zbotic

Applications and Use Cases

• Human presence and occupancy detection in smart buildings
• Intruder or motion alarms for security systems
• Adaptive lighting control based on room traffic
• Collision avoidance and navigation aid in robotics
• People-counting and flow monitoring in retail environments

How to Use Ai-Thinker Rd-03D

Mount the module via the 4-pin 1.25 mm socket, supply 5 V and GND, then connect TX/RX lines to your microcontroller’s UART pins. Power up the unit, configure the baud rate (default 256000 bps), and begin reading real-time detection data for integration into your tracking, alarm, or automation system.

Why Buy from Zbotic?

• Genuine Products: All items sourced from authorized distributors
• Fast Shipping: Orders ship within 24 hours with tracking (non backordered products)
• Free Shipping: Free delivery on qualifying orders
• COD Available: Cash on Delivery, UPI, cards, net banking
• Technical Support: Expert help for setup and troubleshooting
• Easy Returns: Hassle-free replacement for defective products

Frequently Asked Questions

How do I power and interface with the Ai-Thinker Rd-03D?

Connect 5 V to the VCC pin, GND to GND, then interface TX and RX to your host MCU via the 4-pin 1.25 mm UART connector. Data is exchanged at 256000 bps by default.

What environmental conditions can Rd-03D handle?

The module reliably operates between –40 °C and +85 °C and can be stored up to +125 °C (90% RH), making it suitable for harsh industrial settings.

How does the Rd-03D deliver detection data?

Target presence and motion information are processed on-board and sent as real-time packets over the UART interface for easy integration into tracking applications.