Further to what we have studied above, we will now take a closer look at how things work within. For this, there is a definite need to understand the underlying architecture altogether. This will not only provide you the details that are required for you to carry out an experiment all by yourselves but also provides you a better understanding of the whole concept.
The IoT starts or ends with an event: a simple motion, a temperature change, perhaps an actuator moving on a lock. Unlike many IT devices in existence, IoT in a large part is about a physical action or event. It responds to affect a real-world attribute. Sometimes this involves considerable data being generated from a single sensor, such as auditory sensing for preventative maintenance of machinery. Other times, it's a single bit of data indicating vital health data from a patient.
An IoT system altogether consists of 4 different components which are Sensors, Connectivity, Data Processing, and the final one being a User Interface - UI. Now with this understanding, let us go through each and every component in detail. You can also make some references of these from the architecture diagram that is provided on the next page.