This article is about the usage of the LD2410 Human Presence Detection Sensor with ESP32. Earlier we used motion detection sensors like PIR Sensor to detect motion when any object is moving. The PIR Sensor works by measuring the infrared (IR) light emitted from, or reflected by, that object.

The Hi-Link LD2410 mmWave radar sensor is a game-changer for precise human presence detection. Unlike traditional PIR sensors that only trigger on movement, the LD2410 detects both stationary occupants (e.g., someone sitting or sleeping) and motion. This makes it ideal for automation scenarios where accuracy is critical.

In this tutorial, we’ll understand the LD2410 capabilities by interfacing it with an ESP32 microcontroller. We will create a versatile Human Presence Detection System. The setup includes two LEDs: a red LED to signal when a person is stationary (at rest) and a green LED to indicate active motion. Additionally, real-time detection data, including distance metrics (up to 6 meters), will be displayed on a 0.96-inch OLED screen, providing immediate visual feedback. A 60GHz mmWave sensor called C1001 is also available in market, which is more advanced.