Type of iPhone doesn't matter the layout is always the same...
So to check the WiFi settings
Go to settings
Select WiFI
Connect to your OBD WiFi then select the blue i (info) icon there you will see the IP, Subnet, Router and DNS addresses of your connection.
Config mode on the ODB is better done on a laptop (from my experience). On the OBD press the button 3 times then connect to the WiFi and then in your browser go to obdconifg.com
The settings in DC are under settings, scroll down to connection and there is a setting for OBD-II data port, this is set on default to Auto, select and input the IP as 192.168.0.10 and port 35000.
Hope that helps