Is there a problem with your SimpliSafe entry sensor? Signal interference, bad positioning, or low batteries are frequently the causes of this problem. Make sure the sensor is correctly positioned, within range of the base station, and check the battery first. Additionally, you can use the SimpliSafe app to remove and re-add the sensor. Discover how to resolve non-functioning SimpliSa... https://simplsecure.com/simplisafe-entry-sensor-not-responding/