When rain sensor is activated, the UI/app should show a notification at the bottom of the screen. To quickly test, you can go to Edit Options, Weather Control, make sure ‘Use Rain Sensor’ is checked, then set the ‘Normally Open’ checkbox to the opposite of your rain sensor type (most rain sensors are normally closed, so you can check the Normally Open checkbox). This will cause the controller to think the rain sensor has been activated. Go back to the homepage, it should show a ‘Rain Detected’ message. In addition, if you check the LCD screen of the controller it should show a rain icon.