📡 Ai-Thinker RD-03L V2 is a compact, battery-powered radar module designed for ultra-low-power human presence detection. It integrates simplified 24GHz millimeter-wave hardware with intelligent sensing firmware, making it ideal for indoor smart applications.
🔧 At its core is the ICL1112 millimeter-wave SoC—a high-performance, single-transmitter-receiver chip operating in the 24GHz K-band. With just 55μA of power consumption, it delivers robust range-finding using FMCW continuous wave technology, detecting subtle human motion in real time.
📏 Detection Range: Up to 8 meters, with customizable thresholds for:
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Trigger and hold distances
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Presence status updates
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Reporting frequency
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Unoccupied timeout settings
🔌 Interfaces: Supports GPIO and UART, enabling plug-and-play integration into a wide range of smart devices and IoT systems.
🏠 Whether you're building smart lighting, security systems, or occupancy-aware automation, the RD-03L V2 offers a flexible, developer-friendly solution with precision sensing and minimal power draw.
🏠 Smart Home – Detects human presence and distance, reports monitoring data, and enables intelligent control of household appliances.
🛡️ Smart Security – Triggers access control and alarms, and integrates with cameras for automated security responses.
💡 Smart Lighting – Recognizes human presence and precise location, ideal for public spaces or home lighting systems like motion-sensing lamps, bulbs, desk lights, and mirror lights.
🏬 Smart Retail & Commercial Spaces – Senses human approach or departure within defined zones; instantly lights up screens and keeps devices active while people are nearby.
🚗⚡ New Energy & Parking Facilities – Activates EV charging station screens, monitors parking space occupancy, and prevents unauthorized human access near wireless charging zones.
Product Details
Product Parameter
| 🆔 Parameter | 📐 Specification |
|---|---|
| 📦 Model | RD-03L V2 |
| 📏 Package | DIP-5 (2.54mm pitch) |
| 📐 Dimensions | 17.5 × 19.0 mm ±0.2 mm |
| 📡 Frequency Band | 24.00 GHz – 24.25 GHz (ISM band) |
| 🌡️ Operating Temp | –40°C to +85°C |
| 📦 Storage Conditions | –40°C to +125°C, <90% RH |
| ⚡ Power Supply Voltage | 3.0V – 3.6V (Recommended: 3.3V) |
| 🔌 Power Supply Current | ≥200 mA |
| 🔄 Communication | UART (Default baud rate: 256000 bps) |
| 📶 Sensing Range | Up to 8 meters (±60° coverage) |
| 🔋 Typical Current | ~80 μA @ 1Hz reporting frequency |
| 📡 Radar Type | FMCW continuous wave, single TX/RX antenna |
| 🧠 Detection Targets | Moving, slightly moving, and stationary humans |
| 🔧 Interfaces | UART, GPIO |
| 🧱 Mounting | Wall-mounted recommended |
| 🛠️ Customization | Configurable thresholds, reporting intervals |
| 🔐 Firmware | Supports IAP online upgrade |
Pinout Description
| 🔢 No. | 📛 Name | ⚙️ Function |
|---|---|---|
| 1 | 3V3 | Input power |
| 2 | GND | Ground |
| 3 | TX | UART_TX – Transmit data via UART |
| 4 | RX | UART_RX – Receive data via UART |
| 5 | OT2 | Detection result output: High level when sensing, Low level when idle |
Product Size