I have a second hime in a remote area. Only our access to internet is cell service. I have a cellular network sim card from a phone powering a modem that I use for wifi. While setting up my Rachio 3, I continually get the following screens. “unexpected error occured”.
FWIW, I have a few other “smart” devices setup in the house and all seem to handle this version of wifi ok. To add to the frustration, it was working for a week or so with no problems. Nothing changed but I got the “controller offline” message when I tried to do a quick run via the app. I tried to setup everything again and ran into my current problems.