The LawnCheck Check-In service runs nightly. It determines if devices are checking in as they should be. If a device has not recently checked in, you will be notified via email.
Another option is to select the device and click the "Statistics" tab to view the last check in time. In addition, you can view the Irrigation Commands Log, and the Connection Log, click on the "Reports" tab to view these logs. The connection log provides a log of outages so you can get an idea of the relibility of your Internet connection.
Also, please note: LawnCheck can only provide information as to whether your controller is receiving commands and working properly. You are responsible for ensuring that your irrigation system is properly maintained and that your landscape is being properly irrigated.