On raspi or armbian enter ls /dev/serial/*/* and you will get a list with your device identification.
root@zero:~# ls /dev/serial/*/*
/dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A100N0DB-if00-port0
/dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A105BTTA-if00-port0
/dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A7031XJZ-if00-port0
/dev/serial/by-path/platform-sunxi-ohci.2-usb-0:1:1.0-port0
/dev/serial/by-path/platform-sunxi-ohci.3-usb-0:1:1.0-port0
/dev/serial/by-path/platform-sunxi-ohci.4-usb-0:1.4:1.0-port0
root@zero:~#
You can use any of these results and it will never change.