LD2402 Update firmare problem

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update

Hello Hi-Link Support Team,

I am experiencing an issue while trying to update the firmware on my HLK-LD2402 radar module using the official HLK-LD2402_TOOL (v1.0.1.9).
image.png

This ld2402.bin - is renamed 2402_335_OTA.bin

Hardware setup:

  • Module: HLK-LD2402
  • Connection: Hardware USB-UART adapter (CP2102/CH340)
  • Wiring: VCC → 3.3V, GND → GND, TX → RX, RX → TX (crossed)
  • Jumper on adapter set to 3.3V
  • Wires soldered directly to module pads (short, ~3 cm)

Symptoms:

  1. The tool successfully connects to the module and reads:
    • Current Firmware: BootLoader
    • Device ID: 0x4150335a
  2. When I click "Obtain Firmware Info", the log shows:
    • "Obtaining firmware information"
    • "Device ID: 0x4150335a"
    • "Failed to obtain program partition information"
  3. When I select a .bin firmware file and click "Flash", a popup appears:
    • "Please choose the download partition!"
  4. There is no partition selection UI (no checkboxes for App0/App1/Parameter) in the tool window.

I have tried:

  • Both OTA and full-image .bin files
  • Different baud rates (115200 is the only one that detects the device)
  • Power-cycle trick (connecting VCC at the moment of clicking Flash)
  • Multiple firmware files from the official package

Questions:

  1. Is there a newer version of HLK-LD2402_TOOL that supports reading the partition table for Device ID 0x4150335a?
  2. What is the correct manual partition address for HLK-LD2402 firmware update (App0 / App1 offset)?
  3. Can you provide a full (non-OTA) firmware image for HLK-LD2402 compatible with BootLoader mode?
  4. Is there a known compatibility issue between tool v1.0.1.9 and certain BootLoader revisions?

Please find the screenshot attached showing the exact error messages.

Thank you for your assistance.

Best regards,
Alex

2 Answers

Dear Hi-Link Support Team,
The core of the issue is that I downloaded the software directly from your official download platform: https://d.hlktech.net/Mobile/Download.
image.png
This platform only offers the version I am currently using (v1.0.1.9). I have tried to find other or newer versions of the tool, but I could not find them on your website or anywhere else on the internet.
Furthermore, the only firmware file available on your official platform is the OTA version, not the full image required for a BootLoader flash.
image.png
Could you please help me by providing:
A newer or compatible version of the HLK-LD2402 flashing tool that can correctly read the partition table.
The full (non-OTA) firmware image (.bin) for the HLK-LD2402.
Thank you for your assistance.
Sincerely,
Alex

Alex1

Hello, thank you for your feedback. To assist with your issue, we need to confirm the following two details:

  1. Please provide the firmware version of your module.
  2. Does the module complete firmware upgrades successfully?
HLK-Ellen361

Dear Support Team,
I don't know how to determine this. When I connect through HLK-LD2402_TOOL, no additional information is displayed - the field remains empty.
No, the process stops exactly at the error shown in the screenshot from my first message ("Failed to obtain program partition information"), and no further progress is possible.
Please advise.
Best regards,
Alex

Alex•

Hello Alex, We regret to inform you that the module has failed and can no longer be used.

HLK-Ellen•
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