A firmware update to AE-200A Centralized Controller improves the functionality of building controls and helps to maximize efficiency. One of the features of the firmware update is direct access to the BACnet building-management system. The system can pinpoint where the highest energy usage occurs and enables building owners and facility managers to adjust settings. The firmware also has new proportional-integral-controller inputs, trending capability, and a night-mode setting. Additional features include an integrated centralized control web that provides users of smartphones and tablet devices easy access.