I am using a FTDI chip on a board for USB communication. The chip is seen by Linux, “lsusb” returns the chip identifier and I can see USB communication. If I declare Reacfh as base, the serial ouput link proposes “/dev/ttyUSB0” or serial. However in rover mode, the input serial path only proposes UART but not USB or /dev/ttyUSB0.
A working solution is to use the same serial port for input and output as rover only receives datas from base and emits the positions