Decent Espresso

Half Decent Scale Updater tool

Find the tool on our support pages.

The Half Decent Updater strives to simplify the firmware updating procedure for your Half Decent Scale.

How to Update Your Half Decent Scale

What You Need
  • A Google Chrome or Microsoft Edge browser (other browsers won't work)
  • A USB cable connected between your scale and your computer
  • Mac users: you may need to install the CH34x USB driver first — without it, your computer won't recognize the scale. Some Windows and Linux machines may also need this driver.

    • Step 1: Pick a Version

    Open the updater page and choose the version you want from the Version dropdown. If a second dropdown called PCB Variant appears, check the label on your scale's circuit board and pick the matching option.

    select version dropdown

    Step 2: Download

    Click the Download button. A file will be saved to your computer — remember where it goes (usually your Downloads folder).

    download button

    downloaded firmware zip

    Step 3: Load the File

    Click Choose File and select the file you just downloaded. A green message will confirm the file was loaded successfully.

    firmware zip selected for upload

    Step 4: Connect Your Scale

    Click Connect Device. Your browser will show a popup asking you to pick a device — select your scale from the list and click Connect.

    NOTE: Older versions of scales will show up as:

    wchusbserial

    or on Windows:

    COMx (where X is a number from 1 to 10)

    Newer versions will show up as:

    Half Decent Scale

    select device

    You'll know it worked when the device info box appears.

    device connected

    Step 5: Update

    Click Flash Firmware and wait. You'll see a progress bar — don't unplug the scale or close the page while it's running.

    When the message "Flashing completed successfully!" appears in green, you're done. Your scale will restart on its own with the new software.

    update in progress

    Something Not Working?
  • No device shows up in the popup :Try a different USB cable — some cables only charge and can't transfer data
  • The connection fails : Unplug the USB cable, plug it back in, and try again
  • The button says "Connect" but nothing happens : Make sure no other programs are connected to the scale (close any you're unsure about)


  • German: Aktualisierungstool für Half Decent Scale
  • French: Outil de mise à jour pour Half Decent Scale
  • Spanish: Herramienta de actualización para Half Decent Scale

    vid created 2026/03/23, vid updated 2026/05/18