Ai-Thinker Rd-03E-Gesture 24GHz UART Gesture Radar Sensor Module

Transform standard devices into smart, futuristic gadgets with the Ai-Thinker Rd-03E Gesture Sensor Module. Powered by the Silicon Micro S3KM111L millimeter-wave SoC, this 24GHz radar module is designed to detect hand gestures and precise distance, enabling touchless control for your projects.

Touchless Gesture Interaction

The Rd-03E allows users to control devices without touching them. It reliably detects hand movements within a specific angular range (Azimuth ±20°, Elevation ±40°), making it perfect for:

• Smart Switches: Wave to turn lights on/off.

• Media Control: Swipe to change pages or slides on advertising screens.

• Hygiene Safety: Contactless buttons for elevators or medical equipment.

High-Precision Ranging

While optimized for gestures, this module also delivers professional-grade ranging data. It can detect moving bodies up to 6 meters and subtle micro-movements up to 3.5 meters with an accuracy of ±5cm. This dual capability allows your device to wake up when someone approaches and respond to their hand signals.

Robust & Reliable

Unlike optical sensors (cameras/IR), the Rd-03E uses 24GHz FMCW radar technology, which is unaffected by temperature, sunlight, or darkness. It features a narrow beam (1 Tx / 1 Rx) for strong anti-interference performance.

Key Features

• Gesture Recognition: Identifies hand movements for touchless command execution.

• Dual-Mode Sensing: Simultaneously performs human presence detection and distance measurement.

• Visual Configuration: Supports visual tools to configure detection intervals and sensitivity gates easily.

• Smart Filtering: Intelligent algorithms distinguish between moving, micro-moving (breathing), and stationary targets.

• Easy Integration: Standard 2.54mm DIP pins and UART interface for plug-and-play connection with Arduino, ESP32, or STM32.

Technical Specifications

Feature	Specification
Model	Rd-03E (Gesture Version)
Chipset	Silicon Micro S3KM111L
Technology	24GHz FMCW Radar
Gesture Range	Azimuth ±20° / Elevation ±40°
Human Detection Range	Up to 6 Meters (Moving) / 3.5 Meters (Micro-motion)
Ranging Accuracy	±5cm (0.3~3.5m)
Interface	UART (Serial Port)
Antenna	1 Transmit / 1 Receive (Narrow Beam)
Supply Voltage	5V

Typical Application Scenarios

• Smart Home: Gesture-controlled lighting and HVAC systems.

• Digital Signage: Interactive advertising screens that wake up on approach and slide on gesture.

• Public Health: Touchless elevator buttons and restroom fixtures.

• Security: Advanced perimeter guards that track distance and movement type.

Please Download the manual here.

Important Product Disclaimer

Please note that the product information provided on our website may not be entirely accurate as it is collected from various sources on the web. While we strive to provide the most up-to-date information possible, we cannot guarantee its accuracy. We recommend that you always read the product labels, warnings, and directions before using any product. Product images are shown for illustrative purposes only and may differ from the actual product.

Note

The actual product may vary in slight variation in electronic components/marking/resemblance with the image shown depending upon quantity availability. Images are for representation only.

Related Radar and UWB Products

Compare this module with related radar sensors, mmWave modules and development boards available from TechyTron.

• Ai-Thinker Rd-03_V2 24GHz mmWave Human Presence Radar Sensor
• Ai-Thinker Rd-03E 24GHz Radar Ranging and Gesture Sensor Module
• Ai-Thinker Rd-03H 24GHz Human Presence Radar Sensor – Up to 10m
• Ai-Thinker Rd-03L_V2 Low-Power 24GHz Human Presence Radar Sensor
• Browse all Radar and UWB modules

Downloads and Documentation

Use these manufacturer or reference documents to verify specifications, wiring, communication protocol, firmware support and installation requirements before designing your system.

• Ai-Thinker Rd-03 series documentation
• Rd-03E product/reference page
• TechyTron Radar and UWB category

Documents may be updated by the manufacturer. Always confirm critical details with the latest official documentation before production use.

Product Disclaimer

Images are for representation only. Actual product appearance, PCB marking, connector style, antenna layout, colour, pin-header configuration or included accessories may vary depending on the available production batch. Product description information listed here is collected from different internet sources, manufacturer pages, datasheets and reference documents, and may contain mistakes or become outdated. Always verify critical electrical, mechanical, firmware and safety details from the latest official manufacturer documentation before design, production or field installation.

Radar, mmWave and UWB sensing performance depends on firmware, configuration, power supply quality, installation height, antenna direction, enclosure material, target size, target movement, reflections, interference, line-of-sight and surrounding environment. Distance, angle, accuracy and current values are reference values unless explicitly guaranteed by the latest manufacturer datasheet for the exact supplied revision.