This document details the initial version of the Smartness Hub implementation. The current implementation has been focused on the Proof of Concept (PoC), while the next versions will be extended to the other pilots. The document describes the Knowledge Graph at the edge level, accomplished by NGSI-LD compliant IoT brokers, the different building models being considered, namely, SAREF, BRICK and Smart Data Models, as well as a model for the SRI assessment, developed within the project. The document also describes the current status of the user and grid services being developed. Current services access data directly from NGSI-LD brokers, while future services, such as the SRI computation, will make use of data analytics tools hosted in a dedicated graph storage. Finally, the document also includes the current status of the security and privacy features being developed for the PoC.