How to use USB-C to upgrade your HDS firmware (v3.0.0 and above)

Download the firmware update and unzip (extract) the folder.
Inside that folder, you should see these four files:
- bootloader.bin – starts up the device
- partitions.bin – tells the device how to organize its memory
- firmware.bin – the main software for the device
- littlefs.bin – holds the web apps for Half Decent Scale

If using a Mac, make sure you have installed the required WCH CH34X drivers for macOS first.
If using a Windows PC, make sure you have installed the required WCH CH34X drivers for Windows first.
Use a USB-C cable to connect your HDS to your computer.
- If your HDS display does not turn on or doesn't show the charging animation, do not worry. ESP Flash tool can still connect to it
Open Firefox or Chrome (other browsers may not work).
Go to the ESP Flash Tool page in your browser.

In the Flash Tool, choose the highest baud rate available - 921600 Baud.
Click Connect.
From the list of devices, on macOS select wchusbserial, on Windows, select “USB Serial” .
The tool should now be connected to your HDS.
- HDS display will turn off at this point

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For each of the four .bin files in the folder, choose it in the tool and enter the offset value shown in the video guide.
- bootloader.bin: 0x0
- partitions.bin: 0x8000
- firmware.bin: 0x10000
- littlefs.bin: 0x670000
Double-check that the offsets match correctly.

Click Program.
Wait until the tool tells you it's finished.
When prompted, restart your HDS:
- Turn it upside down.
- Find the small round hole on the bottom right.
- Push a paperclip (or SIM ejector tool) into the hole until you hear a click.

✅ Done!

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Updated 2025/09/27