Developing Distributed WoT Applications for the Cloud-to-thing Continuum

The great popularity and acceptance of smart devices have encouraged the development of applications focused on the Internet of Things (IoT) and Web of Things (WoT) paradigms. These applications are normally based on cloud-centric architectures. However, the increasing amount of information exchanged and the need of IoT devices capable of adapting on real-time their behavior to the user context pose a challenge to these architectural assumptions. Recently, paradigms such as Fog, Edge, and Mist computing have been proposed along the Cloud-to-thing continuum to exploit the computational and storage capabilities of end devices (IoT devices, smartphones, etc.) in order to distribute some tasks on them, reducing the overhead both in the cloud and in the network, and increasing the response time. Currently, the implementation of these paradigms requires developers to be qualified and trained to create ad-hoc systems, as there is a lack of standards and tools to facilitate the development of these highly distributed applications. This tutorial delves into the deployment of WoT applications along the Cloud-to-thing continuum. It presents a framework based on existing standards to shorten the learning curve, the development time, and improve the software quality.