Use for :
A single vesc only has one UART port output, which is not enough, if it's occupied with other usage(eg. connect a throttle via ADC port), then user can't use connect a Bluetooth or other device (eg. Davega screen)
It's compatible with all other single VESC (It only has one UART port).
Since single ubox only have one UART port, using this seperator can't make two UART ports. It ONLY helps to seperate some port function in paralle.
Circuit scheme :