how to use this tool

[sebastianet]

mr Burton - I need some help

I have an "Elegoo Smart Robot Car 3.0 Plus", that has a "Arduino Uno" inside,
but instead of the usual "CH-341" USB chip, it has an "Holtek HT42B534-2"

Under my Ubuntu 18.04 LTS, the Arduino IDE can not connect to the robot.
Under Windows it was not working, until I installed "USBBridgeSetup_CA.exe" -
after install, a new "COM4" port comes up and Arduino IDE talks to Uno using it.

Looks to me your code wants to do something similar,
but I dont understand how to use it

1. I have installed "sudo apt-get install python3-usb"

2. now I run "$ ./holtek-prog.py -h" and I get a nice list of options

3. when I run "lsusb" I get a clear

 idVendor           0x04d9 Holtek Semiconductor, Inc.
 idProduct          0xb534 

4. I can provide this (holtek) "idVendor" and "idProduct" to "holtek-prog.py", as

positional arguments:
  vid                   Vendor ID to change
  pid                   Product ID to change

but ... what values must I provide as

  -v SETVID, --setvid SETVID
                        Set Vendor ID
  -p SETPID, --setpid SETPID
                        Set Product ID

???

I have an "Arduino "Nano" that DOES work with Ubuntu Arduino IDE - are those the values to provide from "lsusb" ?

The Arduino "Nano" values at "lsusb" are

 idVendor=1a86
 idProduct=7523

I can fit those 4 parameters into your tool but there still one missing :

• what is "-s sets the Serial to 9876" ???

Question : how do I do to get a "ttyUSB0" in my Ubuntu when connecting the Elegoo Uno with Holtek USB xip ?

Thanks for your help.
Sebastian.