You will have lowest risk with a RS232 to USB converter which uses an FTDI chip. As I mentioned I use a LogiLink converter which has such a chip for the Linux laptop to FS2 connection. For my LX-90 the RPI3 also running Ubuntu MATE 16.04 in headless mode is connected via a StarTech.com ICUSB2321F which also has the FTDI chip.

Read More...