Read honest and unbiased product reviews from our users. Amazon.com: rainbird wifi controller. Bought and didn’t realize that rain bird ESP-Me controller had to be WiFi ready. How do I back up and restore my Rain Bird App so I don’t lose my settings and connected irrigation controller(s)? Select the WiFi Signal strength tab or icon depending on the controller type. This can be improved by moving the router closer to the controller or using a WiFi range extender. Why did my controller water after we had a big rainstorm if I have a LNK Module and/or a rain sensor connected? Mine was not I could have returned and bought a new controller WiFi built in for about $20 more. If it does not connect you can try again later or use one of the signal strength scanning apps listed below step 2. This is seen at the controller with a blinking red WiFi Module. iOS:  Settings-> Select Apple ID -> iCloud -> iCloud Backup (On) Android:  Settings -> Backups (name may vary on different devices) -> Backup (On) (or) Drive (Google Drive App) -> Backups ->