Arduino UNO to communicate with Cerbo GX over usb using RS485 Cable

Hi All,

i am experimenting with the Arduino UNO and the cerbo, my aim is to retrieve data from a modbus sensor into node red, i have successfully had the arduino connected to the sensor and reading data in IDE, but i am now struggling to set up over USB to the cerbo.

has anybody successfully had communication between the cerbo and an arduino UNO over usb with the victron rs485 cable