Seeed Studio Studio 24GHz mmWave Sensor for XIAO - Human Static Presence Detection Module

The module is designed to be powered directly through the Seeed Studio Studio XIAO host board's 3.3V rail. Ensure your XIAO board (e.g., XIAO ESP32C3) can supply the required average current of approximately 79mA. Do not apply voltages higher than 3.6V directly to the module's pins.

The primary interface is UART serial communication. You can send AT-style commands via the TX/RX pins connected to your XIAO to set the detection range, sensitivity, and output mode. Alternatively, use the integrated Bluetooth Low Energy (BLE) to connect a smartphone app for wireless parameter adjustment and real-time data visualization without any wiring.

Yes, a key feature of this 24GHz FMCW radar is its ability to detect static human presence by sensing micro-vital signs like breathing and heartbeat, unlike standard PIR sensors. It can distinguish between an empty room and one with a stationary person sitting or lying down.

The sensor has a configurable detection range from 0.75 meters up to a maximum of 6 meters, with 5 meters being a typical effective range for human presence. Its horizontal field of view is ±60 degrees (120 degrees total), creating a wide conical detection zone in front of the module.

While it operates from -40°C to +85°C, it is primarily designed for indoor applications. Its 'shell penetration' capability allows it to sense through thin, non-metallic materials like plastic, drywall, or wood, making it suitable for behind-panel installations. Metallic enclosures or thick concrete will block the 24GHz signal.