Smart cities is definitely one of the latest buzzwords, together with the Internet of things (IoT), cloud computing, smart data and visible light communication (VLC). Interesting enough, it is actually the presentation of these factors integrating all together on a scale of a city. Everything in a city–transportation, communication, security, water and power supply, and other community services–through networks, computing, analysing, and data transfer, can be more efficiently managed and improved. This is how a smart city is conceived.