Firmware Flashing

BLELogger ships pre-flashed. Re-flash for updates or recovery.

Web Flasher (browser, no install)

1. Connect BLELogger'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, Flash Firmware.
4. Wait ~2 minutes — the LED is dark during flashing, that's normal.
5. Re-power.

Linux serial permissions

If 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.

Companion app alternative

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