A garage door opener system includes sensor components and actuatable components. When a condition is detected based on sensor output, a responsive action is selected. The actuatable component is controlled to perform the selected responsive action. Accessory sensors and actuatable accessories may be in communication with the garage door system. When the accessories are found to be present by the garage door opener system, and a condition is detected by the accessory sensor, a responsive action is selected and the actuatable accessory is controlled to perform the responsive action. In either case, the responsive actions may be selected based on rules. The responsive actions may be performed by a combination of the actuatable components of the garage door opener system and the actuatable accessories in communication with the garage door opener system.