Figs. 4 and 5 report an example of the type of data that can be
collected with the Padova Smart City system. The four plots
show the temperature, humidity, light, and benzene readings
over a period of 7 days. Thin lines show the actual readings, while
thick lines are obtained by applying a moving average filter over
a time window of 1 h (approximately, 10 readings of temperature,
humidity, and light, and 120 readings of the benzene sensor,
whose sampling rate is larger since the node is powered by the
grid). It is possible to observe the regular pattern of the light
measurements, corresponding to day and night periods. In
particular, at daytime, the measure reaches the saturation value,
while during nighttime, the values are more irregular, due to the
reflections produced by vehicle lights. A similar pattern is
exhibited by the humidity and temperature measurements that,