The term computer network that we commonly use is the network of computers. Such a network consists of a laptop, desktop, server, or a portable device like tablet, smartphone, smart watch, etc., connected through wire or wireless. We can communicate between these devices using Internet or LAN. Now imagine what if our bulbs, fans and refrigerator also became a part of this network.
How will they communicate with each other, and what will they communicate? Think about the advantages and tasks that can be accomplished if all these devices with smart connectivity features are able to communicate amongst themselves and we are also able to communicate with them using computers or smartphones.
The ‘Internet of Things’ is a network of devices that have an embedded hardware and software to communicate (connect and exchange data) with other devices on the same network as shown in Figure 3.10. At present, in a typical household, many devices have advanced hardware (microcontrollers) and software.
These devices are used in isolation from each other, with maximum human intervention needed for operational directions and input data. IoT tends to bring together these devices to work in collaboration and assist each other in creating an intelligent network of things. For example, if a microwave oven, an air conditioner, door lock, CCTV camera or other such devices are enabled to connect to the Internet, we can access and remotely control them on-the-go using our smartphone.
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