WIFI Will not connect

Bought Rachio 3 (8 zones) and hooked up yesterday. Only took 15 mins to install, but spent 2-1/2 hrs trying to connect to WIFI. I did everything per website to troubleshoot, but nothing. Restarted, unhooked router several times, tried airplane mode, tired resetting WIFI setting on controller 10 plus times… Finally I took the entire device off the wall and took it into room with WIFI router and plugged it into outlet, still nothing. I’m lost and I know how to hook things up to WIFI. There is something wrong with this new unit. What can be the issue? Using a Apple Iphone X. I might as well hook back up the manual hummingbird that I replaced, I had zero issues, but I liked the WIFI and smart device, but does no good if you can’t get it working.

Did you try this?.. hoping it works for a friend of mine… going up tmw to try it on his…