BWFlasher
Open-Source · Xiaomi / Brightway

Your scooter,
your rules.

Firmware modifications for Xiaomi & Brightway scooters – step by step, clearly explained.

01

Downloads

BWFlasher
Open-source tool for flashing Brightway controllers over UART.
FTDI USB-Treiber
Required for your FTDI adapter to be recognized as a COM port. For Windows 10 & 11.
02

Choose your firmware

Xiaomi 4 Pro 2nd
Mi Scooter 4 Pro 2nd Gen
⬇ Firmware
Xiaomi 5
Mi Scooter 5
⬇ Firmware
Xiaomi 5 Pro
Mi Scooter 5 Pro
⬇ Firmware
Xiaomi 5 Max
Mi Scooter 5 Max
⬇ Firmware
03

Preparation

What you need

  • Windows PC or laptop
  • BWFlasher (download above)
  • Firmware file for your model (download above)
  • FTDI USB adapter + matching dashboard cable
  • Scooter with enough battery charge

Software setup

  1. Run BWFlasher installer and finish setup.
  2. Extract CDM2123620_Setup and run the driver setup.
  3. Restart the PC so the adapter is detected as a COM port.
04

Step-by-step guide

  1. 01
    Turn the scooter on and activate the rear light so you can see if it stays powered.
  2. 02
    Remove the handlebar from the scooter.
  3. 03
    Unplug the dashboard cable and insert the flashing adapter.
  4. 04
    Verify: rear light must still be on. The scooter must stay powered.
  5. 05
    Connect the adapter to your PC via USB. Open BWFlasher.
  6. 06
    In Serial Port select the correct COM port – usually not COM1.
  7. 07
    Click the Browse button and select the firmware file you downloaded earlier for your scooter model.
  8. 08
    Enable Debug Mode – then verify once more that the rear light is still on.
  9. 09
    Click Start Update. The rear light should now turn off – this is expected.
  10. 10
    Wait until the progress bar reaches 100 % and the console goes quiet. Disconnect the adapter and reassemble the scooter.
05

Troubleshooting