In the last 50 years, a lot of work has been made in order to develop what is now commonly known as Internet. The goal of internet has been to connect all the computing devices among each other, from desktop computer to smartphone. Now, more than half of the world population can connect to Internet and there are many efforts to increase this portion. Recently the challenge of "Internet-of-Things" (IoT) has been to connect not only computing devices but also all commonly used objects to each other. The current trend in technology shows that IoT has the potential to reshape how people interact with their daily environment.