HLK-LD2402 latest firmware with automatic gain adjustment support

Viewed 27

Hello,

I hope this message finds you well. I recently purchased the HLK-LD2402 radar sensor (order date: May 2025) and have been working on integrating it with ESPHome for a home automation project.

While reviewing the user manual V1.08, I noticed that an automatic gain adjustment command was added in the February 2025 revision. However, the latest firmware available for download on your website (2402_335_OTA.bin / v3.3.5) does not appear to support command 0x00EE for automatic gain adjustment — the device returns an invalid response.

Could you please advise whether a newer firmware version is available that supports this feature, and if so, provide a download link?

Thank you very much for your support — your product and documentation are excellent!

1 Answers