The growing urban population drives implementation of smart city concept in various domains such as health, energy consumption, water management and air pollution systems. This paper describes smart city use case development utilizing FIWARE technology as an open-source efficient, standardized and secure smart city platform. While some basic details about FIWARE is provided, the paper is focused on the smart city architecture and use case development founded on this technology.

Wearable devices and smartphone applications have allowed for the utilization of different at-home treatments. Biofeedback is a mind-body technique that enables users to self-regulate the responses of the autonomic nervous system. This paper has conducted a proof-of-concept study to test multimodal biofeedback treatment with smartphone application and custom-made wearable sensor. While contact-based measurements included skin temperature and skin conductance from the sensor, the smartphone's front camera recorded the patient's face to estimate cardiovascular parameters such as heart rate and heart rate variability. The tested individual completed five biofeedback treatments at home, with activation stress exercises before and after a 5-day experiment. The obtained results show increased finger's skin temperature and heart rate variability during biofeedback sessions, indicating the successful biofeedback treatment.