Hi-Link HLK-LD2402G-W 24GHz Millimeter-Wave Motion Sensor Module - UART/GPIO Interface

The module requires a regulated 3.3V DC power supply, with an acceptable input range of 3.0V to 3.6V. It is not designed for 5V logic systems directly; a 3.3V regulator or level shifter must be used if interfacing with 5V microcontrollers to prevent damage.

The module provides two primary interfaces: a UART serial port (TTL level, 115200 bps default baud rate) for sending configuration commands and receiving detailed detection data, and a GPIO pin that can be configured as a simple motion detection output. The UART interface allows for precise control and real-time feedback on target distance and movement energy.

The sensor uses advanced algorithms to classify activity: 'Motion' detects significant limb or body movement (up to 10m). 'Micro-motion' senses subtle movements like typing or breathing (up to 6m). 'Static' detection identifies a completely stationary human presence, such as a person sitting or lying down (up to 5m), which is a key advantage over standard PIR sensors.

While the module has a wide operating temperature range of -40°C to 85°C, it is primarily designed for indoor use. For outdoor or harsh industrial deployment, a protective enclosure is necessary to shield it from direct moisture, condensation, and physical damage, as the PCB itself is not conformally coated or rated for specific IP protection.

The HLK-LD2402G-W features a plug-and-play design with automatic environmental threshold generation, minimizing initial setup. For advanced tuning, parameters like detection range gates, sensitivity, and data output frequency can be adjusted via simple UART commands documented in the manufacturer's datasheet, allowing customization for specific application scenarios.