Smart City applications aim to improve the quality of life of citizens. Applying technologies of the Internet of Things (IoT) to urban environments is considered as a key of the development of smart cities. In this context, air pollution is one of the most important factors affecting the quality of life and the health of the increasing urban population of industrial societies. For this reason, it is essential to develop applications that allow citizens monitoring the concentration of pollutants and avoid places with high levels of pollution. Due to the increasing use of IoT in different areas, there are arising platforms which deal with the challenges IoT implies, such as FIWARE, which provides technologies to facilitate the development of IoT applications. In this paper, an Air Quality Monitoring Unit using Cloudino and Arduino devices and FIWARE technologies is presented. Through Cloudino and Arduino, the monitoring unit gather data from various sensors and transforms the data in a FIWARE data model. Then, the measurements are sent to the Orion Context Broker (OCB), which is a software component provided by FIWARE. The Orion Context Broker allows to manage and publish the data to be consumed by users and applications.

The Internet of Things (IoT) allows objects becoming producers and users of information generated by themselves, by people or by other systems and also facilitates automating applications. One of the IoT topics is home automation, which allows monitoring and manipulating objects in a house. Because of the growing of IoT, there are emerging different platforms to face this technology, such as FIWARE, which provides components and data models that facilitate the development of IoT applications. In this paper, a smart plant prototype based on FIWARE is presented. The plant environment data is gathered through different sensors, and is sent to a FIWARE component called Orion Context Broker (OCB) in a FIWARE data model structure. The OCB allows to manage and publish the data, so that, the data is available in the cloud ready to be consumed by other users or applications and to automate applications.