OpenIoT: Open Source Internet-of-Things in the Cloud - Interoperability and Open-Source Solutions for the Internet of Things - page 22

4.2 Urban Crowdsensing Application

This is a mobile application for community sensing where sensors and mobile devices
jointly collect and share data of interest to observe and measure air quality in real-time.
Volunteers carrying wearable air quality sensors contribute sensed data to the OpenIoT
platform while moving through the city. Citizens are able to consume air quality
information of interest to observe it typically in their close vicinity. Figure 6 shows air
quality sensors measuring temperature, humidity, pressure, CO, NO2 and SO2 levels
which communicate with the mobile application running on an Android phone via a
Bluetooth connection. Users can declare interest to receive environmental data (e.g.,
temperature, CO levels) in their close vicinity and in near real-time. Moreover, they can
express interest to receive the readings portraying poorest air quality for an area over
time, or average readings within speci c areas as soon as they are available.

Fig. 5. Phenonet Experiment Illustration

Fig. 6. Air Quality Sensors and Mobile Application