Did you change your router SSID or password recently? Depending on which version of firmware your controller is running:
– if it runs a fairly recent firmware, you can press B3+B2 (like how you press Ctrl+C) to reset it to AP mode, then you can go through the WiFi setup steps again to have it log on to your WiFi again.
– if it’s an earlier firmware, the only thing to recover WiFi is to perform a factory reset. The reset procedure is as follows:
– Power off OpenSprinkler, then power it back on, and as soon as you see the OpenSprinkler Logo, press and hold first button (B1) until the LCD displays ‘Reset?’ It should have selected ‘Yes’ by default.
– Press and hold the third push-button (B3) until the device reboots and finishes resetting.
After reset, it goes to AP mode. You can follow the WiFi setup steps again to have it log on to your WiFi, as described in the user manual: