I've been asked many times how we can connect a real drone to a PC using ethernet interfaces. There are plenty of methods such as Mavproxy (if you have Raspberry pi in the middle)
The simplest solution that is widely used is using a TTL to Ethernet Converter module. Assigning the IP and ports might be a little confusing for non-IT users so I created this video to walk you through it and connect our pixhawk to Ground station PC using a LAN Cable.
Links:
UART TTL to Ethernet Convertor Wiki and User Manual and Software:
https://www.waveshare.com/wiki/UART_T...
UART TTL to Ethernet Converter Product Information:
https://www.waveshare.com/uart-to-eth...