Abstract
Internet of Things (IoT) is considered one of the world’s ruling technologies. Billions of IoT devices connected together through IoT forming smart cities. As the concept grows, it is very challenging to design an infrastructure that is capable of handling large number of devices and process data effectively in a smart city paradigm. This paper proposed a structure for smart cities. It is implemented using a lightweight easy to implement network design and a simpler data format for information exchange that is suitable for developing countries like Pakistan. Using MQTT as network protocol, different sensor nodes were deployed for collecting data from the environment. Environmental factors like temperature, moisture, humidity, and percentage of CO2 and methane gas were recorded and transferred to sink node for information sharing over the IoT cloud using an MQTT broker that can be accessed any time using Mosquitto client. The experiment results provide the performance analysis of the proposed network at different QoS levels for the MQTT protocol for IoT‐based smart cities. JSON structure is used to formulate the communication data structure for the proposed system.
Highlights
Internet of Things (IoT) is considered to be another important Information Communication Technology (ICT) wave after the invention of personal computers (PCs), Ethernet, Internet, and the cellular communication [1]
The silver line shows the temperature reading taken from sensor node 2 placed in room G near a gas stove
As the sensor supports for both temperature and humidity, the values can be retrieved from the sensor by sending the request for the specific value
Summary
Internet of Things (IoT) is considered to be another important Information Communication Technology (ICT) wave after the invention of personal computers (PCs), Ethernet, Internet, and the cellular communication [1]. IoT has taken over the world since 2005 and became the very core of the future economic developments in the field of Internet, communication, and networking [2]. Japan’s broadband access is based on ubiquitous and people-oriented technology, providing services with an objective to help efficient communication between people and people and things and between things as well [3]. Singapore is second to none; her next-generation I-hub main objective is to provide secure next-generation “U”-type networks through ubiquitous networking [5]. All these and other such similar projects have laid the foundation of IoT firmly around the world
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