Set up a mobile phone as a temporary hotspot. With a second mobile phone, confirm that you can connect to it and access the internet. Then, use the second phone to provision Rachio to connect to the hotspot. Once the controller is online, set up a Fixed schedule with no weather smarts enabled. Do a Quick Run on that schedule to confirm it works and get water to your plants. This schedule will run indefinitely without internet access, so you can return both phones to normal service and won’t have to worry about anything dying.
If you can’t get the controller to connect to the hotspot, we need to determine whether the controller hardware failed, or for some reason all your provisioning attempts did not work. Provide details including controller light states at each step and error messages from app.
If the controller did connect to the hotspot, please provide info about your network: ISP? Modem make/model? In bridge mode? Router/firewall make/model? Additional access points? Other than SSID and password, list all non-default settings in your network gear.