Unable to Get “Human Detected / No Human Detected” Data from SEN0609 (C4001) with ESP32

Hello DFRobot team,

I’m using the SEN0609 (C4001) 24GHz mmWave radar sensor with an ESP32 to build a human presence detection system.

The sensor is communicating properly via UART, and I’m receiving motion data (target distance, movement status, etc.) using the DFRobot_C4001 Arduino library.
However, I’m not getting any clear “human detected” or “no human detected” output — I only see continuous motion or speed data even when no person is present.
Please help. Any code examples, resources are appreciated.

Thank you in advance