Hi-Link HLK-LD1020 10GHz Motion Detection Radar Sensor - Ceiling Mount, 110° Beam Angle

The module typically operates at a low voltage, compatible with 3.3V or 5V logic systems common in microcontroller applications. For precise voltage requirements and connection diagrams, please consult the official Hi-Link datasheet. It is critical to use a clean power supply to ensure stable radar operation and avoid false triggers.

The HLK-LD1020 provides a processed digital output signal. Its internal chip handles all radar signal demodulation and processing, outputting a simple high/low logic signal indicating the presence or absence of motion. This direct digital output eliminates the need for complex analog signal analysis, making it easy to interface directly with GPIO pins on an Arduino, ESP32, Raspberry Pi, or other microcontroller.

No, the 10GHz microwave signal used by the HLK-LD1020 is designed not to penetrate solid walls, which is a key feature for preventing false triggers from adjacent rooms. It is intended for line-of-sight detection within the specified beam angle. This makes it ideal for room-specific occupancy sensing without interference from neighboring areas.

The HLK-LD1020 module includes functionality for adjustable sensing range and configurable delay settings. These parameters are typically set via external resistor configurations or dedicated configuration pins on the module. Refer to the manufacturer's technical documentation for the specific wiring and resistor values required to tailor the sensing radius and the hold time after motion is detected.

While the sensor is resistant to environmental factors like temperature and humidity, its standard package is not inherently rated with an IP code for waterproofing. For outdoor use, it must be installed within a sealed, weatherproof enclosure that does not obstruct the radar antenna's field of view. The performance is stable, but physical protection from direct rain and condensation is necessary.