The objective of this paper is to discuss a general reference
framework for the design of an urban IoT. We describe the
specific characteristics of an urban IoT, and the services that may
drive the adoption of urban IoT by local governments. We then
overview the web-based approach for the design of IoT services,
and the related protocols and technologies, discussing their
suitability for the Smart City environment. Finally, we substantiate
the discussion by reporting our experience in the “Padova
Smart City” project, which is a proof-of-concept deployment of
an IoT island in the city of Padova (Italy) and interconnected with
the data network of the city municipality. In this regard, we
describe the technical solutions adopted for the realization of the
IoT island and report some of the measurements that have been
collected by the system in its first operational days.