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1. Product Introduction
▫️ Overview
Rd-04
- Rd-04 is a motion sensing module developed by Ai-Thinker Co., Ltd.based on X-band radar technology.
- This module uses the XBR818 chip from Fuxing, with a center frequency of 10.525GHz. It features fixed-frequency, directional transmission and reception antennas (1T1R), integrating functions such as intermediate frequency demodulation, signal amplification, and digital processing. It supports delay setting and adjustable sensing range.
- Key advantages include non-wall-penetrating capability, anti-interference, compact size, effective clutter and high-order harmonic suppression, high stability, and consistency. In pulse power mode, power consumption is in the microampere range, making it ideal for low-cost, low-power applications.
- Suitable for embedded and concealed installations, it is unaffected by temperature/humidity, oil fumes, or water mist. Applications include smart lighting (bulbs, downlights, ceiling lights), low-power devices (video doorbells, smart locks, pet feeders), and more.
▫️ Features
- 10.525GHz single radar (X-band) with delay setting, adjustable sensing range, and light intensity detection.
- Accurately detects (subtle movements) and motion states of human targets.
- Supports continuous power mode and adjustable duty-cycle low-power mode (down to 110μA in pulse mode).
- Optional photosensitive element integration.
- Wide detection angle (±50°) with a maximum sensing distance of 6.5 meters.
- Ultra-compact module size (15*15mm), plug-and-play design.
- Versatile mounting options (wall/ceiling), optimized for low-cost, low-power applications.
▫️ Application Scenarios
- Smart Home: Detects human motion and results to control home appliances.
- Smart Security: Used in access control systems, smart locks, video doorbells, and low-power cameras.
- Smart Lighting/Switches: Enables human presence detection for public or home lighting (e.g., gesture-controlled switches).
▫️ Comparison Table
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Parameter
| Product Image |
| Wireless Protocol |
| Chip |
| Module Flash Size (Mbits) |
| Frequency Band (MHz) |
| Package |
| Dimensions (L×W×H) (mm) |
| Operating Temp Range (℃) |
| Storage Temp Range (℃) |
| Antenna Type |
| Interface |
| Available GPIO |
| Min Voltage (V) |
| Max Voltage (V) |
| Typical Voltage (V) |
| Max Current (mA) |
| Rx Current (mA) |
| Standby Current (μA) |
| Sleep Current (μA) |
| Certifications |
| Max TX Power (dBm) |
| Modulation |
| Max Distance (m) |
| Protocol Support |
2. About Modules
| Module | Datasheets | PCB Footprint | Module Manual |
|---|---|---|---|
| Rd-04 | View | Download | English Manual |
3. Firmware Related
| Module | Firmware ID | Firmware Description | Version | Download Link | Firmware Programming Guide |
|---|---|---|---|---|---|
| Rd-04 | ⭐ #2153 | Standard Human Detection FW | V4.18_P1.0.0 | Download | View |
| Rd-04 | #2966 | Standard PIR + Light Sensor FW | V4.18_P1.0.0 | Download | View |
4. Development Guide
▫️ Basic Materials
- Photosensitive Function Usage: Rd-04 Photosensitive Function Guide