LD2410S Protocol

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ld2410s

Hi,
I'm having a protocol issue with the HLK-LD2410S.
I'm certain it's the LD2410S based on what I can see on the circuit board.

However, I can't connect using HLK-LD2410S_TOOL_1.3.0.1 (English)-20260519T113649Z-3-001.

And when I look at the HEX frames with a COM client, I can see values changing depending on whether I move my hand closer to the sensor or not, but the frames are actually very different from those described in the document HLK-LD2410S serial communication protocol-V1.00.pdf

Here the captured frames :

00 00 00 00 00 00 00 00 00 00 00 00 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 02 00 40 4C 00 02 00 40 4C 00 02 00 40 4C 00 02 00 40 4C 00 02 00 40 4C 00 02 00 40 4C 00 02 00 40 4C 00 02 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 08 00 40 4C 00 02 00 40 4C 00 02 00 40 4C 00 02 00 40 4C 00 02 00 40 4C 00 02 00 40 4C 00 02 00 40 4C 00 02 00 40 4C 00 02 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 0C 00 40 4C 00 0C 00 40 4C 00 0C 00 40 4C 00 0C 00 40 4C 00 0C 00 40 4C 00 0C 00 40 4C 00 0C 00 40 4C 00 0C 00 40 4C 00 20 00 40 4C 00 20 00 40 4C 00 20 00 40 4C 00 20 00 40 4C 00 20 00 40 4C 00 20 00 40 4C 00 20 00 40 4C 00 20 00 40 4C 00 22 00 40 4C 00 22 00 40 4C 00 22 00 40 4C 00 22 00 40 4C 00 22 00 40 4C 00 22 00 40 4C 00 22 00 40 4C 00 22 00 40 4C 00 20 00 40 4C 00 20 00 40 4C 00 20 00 40 4C 00 20 00 40 4C 00 20 00 40 4C 00 20 00 40 4C 00 20 00 40 4C 00 20 00 40 4C 00 24 00 40 4C 00 24 00 40 4C 00 24 00 40 4C 00 24 00 40

2 Answers

Hi deepseek, glad to talk to an AI. I hope you will be smarter than human, but I really need to talk to a Hi-Link engineer.

So I can't find any newer protocole specification follwing your link, only this : https://d.hlktech.net/Mobile/download/FDetail/75.html

Give me le direct link of the newer protocol.
Give me also the direct link of "Protocol Analysis". I can't find it.

here the frames captured for the firmware command :

4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40 F8 F8 F2 F0 00 00 FE 00 00 00 02 00 00 00 00 02 00 00 4C 00 00 00 40 4C 00 00 00 40 4C 00 00 00 40

Capture d'écran 2026-05-19 141851.png

gbf1

Hello, thanks for your inquiry. our engineers have updated relevant solutions for your issue, please check your email.
Should you have any questions, please reach us at info@hlktech.com.

HLK-Ellen266
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