Practical Internet of Things with JavaScript: Build standalone exciting IoT projects with Raspberry Pi 3 and JavaScript (ES5/ES6)

If you have been breathing for at least a decade, you must have heard terms such as smart living, smart spaces, and intelligent devices. All these refer to a parent concept called the Internet of Things (IoT).

In simple words, IoT is when we have our electronic, electrical, or electro-mechanical devices connect to the internet and talk to each other.

Smart devices primarily revolve around two things:

Any solution in the IoT space is either sensing something or actuating something.

With this technology, we have found the solution for Sheldon Cooper (from the Big Bang theory, CBS TV series), where he wants to know who sits on his spot as soon as someone sits on it:

Source: http://bigbangtheory.wikia.com/wiki/Sheldon%27s_Spot

All we do is place a weight sensor underneath the cushion, and if the weight increases, the sensor will trigger the camera pointing at the sofa to take a picture and send a push notification to him with the picture. How about that?

I know I have pushed the examples a bit, but you get the point, right?

IoT has existed in various forms for more than 35 years. The earliest example I found was a Coke machine at Carnegie Mellon University in 1982. Developed by four graduate students, Mike Kazar, David Nichols, John Zsarnay, and Ivor Durham, they hooked up the Coke machine to the internet so that they could check from their desks whether the machine was loaded with cold Coke. Source (https://www.cs.cmu.edu/~coke/).

Sir Timothy John Berners-Lee invented the first webpage in 1991.

Another example is the internet toaster by John Romkey. He connected his toaster to the internet using the TCP/IP protocol. He created one control to turn on the toaster and one control to turn it off. Of course, someone had to put the bread in the toaster:

Source: http://ieeexplore.ieee.org/document/7786805/

Another interesting IoT example is the Trojan Room coffee pot. This was created by Quentin Stafford-Fraser and Paul Jardetzky in 1993. A camera was located in the Trojan Room in the computer laboratory of the University of Cambridge. It monitored the coffee pot levels, with an image being updated about three times a minute and sent to the building's server:

Source: https://en.wikipedia.org/wiki/Trojan_Room_coffee_pot

As mentioned previously, we can see that even before we could imagine the possibilities, people had already worked on internet-related solutions.

Over the past 2 years, there was one thing that I kept on seeing and started believing strongly:

Not necessity, not boredom, but laziness. In this day and age, nobody wants to do mundane things such as grocery shopping, walking up to a switch, and turning on a light or AC. So, we are searching for new and innovative ways to solve these problems.

Now that you have a feel for IoT, you can imagine the literally infinite possibilities that can be built using this piece of technology.

Based on my observations, IoT use cases can be crudely classified into three parts:

The problem solving part comes in where IoT is used to solve a real-world problem, for instance, a farmer whose farm is located half a kilometre from their home, and they have to walk all the way to the farm to turn on their water pumps/motors . Another scenario is where a post-operation patient's vital statistics can be sent to the hospital periodically after his/her discharge, to monitor the patient for any abnormalities. This is where IoT fits in pretty well.

Convenience is where you can turn on your air conditioner 30 mins before you reach your home so you can chill as you enter or unlock your door from your work if someone you know knocks at your door and you are not nearby.

showing off is where you go to another country just to turn on or off your porch light, just to show that IoT works.

All of them are forms of consumption of this technology.

In this book, we will look at covering a few solutions that fall into previous use cases.