The Internet of Things (IoT) is transforming built structures into energy-efficient environments that enhance the experiences of those who occupy them. This goes beyond mere comfort control or cost-cutting. Digital environments enhance the operational efficiency, energy savings, comfort, and health of building owners, managers, and occupants. Smart buildings connect people, support collaboration, and increase productivity while conserving resources. To make this possible, data must be standardized and flow efficiently through gateways with sufficient capabilities and capacity.