The deliverable D4.1 entitled “IoT-ECO hub” reports the activities pertaining to the general design of the IoT-hub (as part of the work planned in the frame of WP4). The concept that is adopted for designing the hub relies on the principles of modularity to allow each partner to develop and deploy their respective module (i.e., educational, and experimental) as they see fit and then focus on defining and implementing efficient and effective interactions among the modules.