I updated the Rachio app last night to the latest version 4.1.11 and it knocked my controller offline. I am no longer able to connect the controller to my WiFi. I emailed customer support, who replied back that Rachio controllers are no longer compatible with modern smartphones or iPads, that I need an older smartphone to connect WiFi.
I tried that, it still won’t connect.
It’s in the high 90s here, and my smart irrigation controller is a piece of junk.