Update README.md

README.md

@@ -72,7 +72,8 @@ Default values should work normally though.
 
 ## Examples
 Example command to test service 17,
-assuming no set client IP (set manually to PC IP Address if necessary) and default board IP 169.254.1.38:
+assuming no set client IP (set manually to PC IP Address if necessary). IP Address or port numbers have to be
+set manually in the global configuration file (IP address can be passed as a command line  argument):
 ```sh
 obsw_tmtc_client.py -m 3 -s 17
 ```