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ZeroTrace HID

Firmware Flashing

Update or recover firmware via the browser-based Web Flasher

Devices ship pre-flashed with the latest stable firmware. Flash again only when:

  • Updating to a new firmware release
  • Recovering a wedged unit
  • Switching between firmware variants

Web Flasher

The flasher runs in any Chromium-based browser using Web Serial — no install.

  1. Connect the device's COM port to your computer with a USB-C data cable.
  2. Open dashboard.zerotrace.pw in Chrome or Edge.
  3. Click Connect, pick the serial port, click Flash Firmware.
  4. Wait ~2 minutes — the LED is dark during flashing, that's normal.
  5. Unplug and re-power.

Linux serial permissions

If the browser shows Failed to execute 'open' on 'SerialPort':

# Debian / Ubuntu / Pop / Mint
sudo usermod -a -G dialout $USER
# Arch / Manjaro
sudo usermod -a -G uucp $USER

Log out and back in for the group change to apply.

Companion app alternative

The Companion desktop app provides a native flashing flow with progress bar — useful if Web Serial is blocked by your browser policy.