An architecture for a home automation system is provided that utilizes a home database stored in an in-home host controller that is synchronized with a configuration database maintained by remote cloud services. In one example embodiment, the home database of the host controller is synchronized over the Internet with the configuration database of cloud services. When there is connectivity between a mobile app used to configure and/or control the home automation system and the host controller via an in-home LAN, data interactions related to the home automation system are performed between the mobile app and the home database over the in-home LAN. When there is not this connectivity, data interactions related to the home automation system are performed between the mobile app and the configuration database over the Internet. If the host controller is reset or replaced, the home database may be restored by synchronization with the configuration database of cloud services.