1.
ABSTRACT:
The recent changes in climate have increased
the importance of environmental monitoring, making it a topical and highly
active research area. This field is based on remote sensing and on wireless
sensor networks for gathering data about the environment. Recent advancements,
such as the vision of the Internet of Things (IoT), the cloud computing model,
and cyber-physical systems, provide support for the transmission and management
of huge amounts of data regarding the trends
observed in environmental parameters. In this context, the current work
presents three different IoT-based wireless sensors for environmental and
ambient monitoring: one employing
User Datagram Protocol (UDP)-based Wi-Fi
communication, one communicating through Wi-Fi and Hypertext Transfer Protocol
(HTTP), and a third one using Bluetooth Smart. All of the presented systems
provide the possibility of recording data at remote locations and of
visualizing them from every device with an Internet connection, enabling the
monitoring of geographically large areas. The development details of these
systems are described, along with the major
differences and similarities between them. The feasibility of the three
developed systems for implementing monitoring applications, taking into account
their energy autonomy, ease of use, solution complexity, and Internet
connectivity facility, was analyzed, and revealed that they make good
candidates for IoT-based solutions.
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