This paper describes the architecture of a comprehensive IoT solution entirely based on the FIWARE platform. The application is designed to record data from environmental sensors and to eventually visualize them on a Smart City Dashboard. Besides solving certain architectural and technical issues, one particular challenge arose from the fact that some of the sensors were assumed to be mounted on public transportation vehicles like buses and trams. It could be shown that the FIWARE platform provides a range of components that allows for building such an IoT platform in a very efficient way.

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