Thank you Samer, You have resolved it. I shut down WiFi on my iPhone and went through the same process and it worked. I thought I had tried that before, but obviously not.
So for anyone else that is interested. The solution is to go into Managing Sites and set up the WiFi first letting the the app find the controller. I give that Site1 the name of WiFi. Then I turn off WiFi and go back and use the plus (+) sign and use the name “Internet” and enter the external Internet IP followed by a “:”and the port number. Now I have the choice of using WiFi or Internet. My yard has spots where the WiFi doesn’t work so I can switch back and forth.
Thanks again for the help. I really like your App and Open Sprinkler.
Keep up the good work.
Wally