Do you have any other SoC board with 3.3 v serial port (e.g. Raspberry Pi, …) that you could use instead of a USB to 3.3V TTL Serial UART cable to access the serial port on the VF2 ?
Even some Arduino boards could be configured as an Arduino Serial Bypass, which is effectively ignoring the Arduino chip altogether and using the on-board serial chip to function as a dumb USB to Serial Converter ( e.g. https://gist.github.com/wmhilton/6034455 ). But you would need to verify that the voltage was 3.3 volts for your particular make and model of Arduino to avoid any risk of permanently damaging the VF2.