IoT (Internet Of Things)

What is IOT?

According to Wikipedia:- The Internet of things (IoT) is the network of physical devices, vehicles, home appliances, and other items embedded with electronics, software, sensors, actuators, and connectivity which enables these objects to connect and exchange data.Each thing is uniquely identifiable through its embedded computing system but is able to inter-operate within the existing Internet infrastructure.

 Url: https://en.wikipedia.org/wiki/Internet_of_things

 What is IOT in simple words?

IOT is a concept and technic to control the electronic device from anywhere through the internet.

Let's understand it with an example. 

Take an example of your house. where you have lights, fens, and television.


Suppose that you are going out of the station. But you want the light of your garden and backyard
is on at night.

Think How .......................... ?

Here the IOT used, You can control your lights from anywhere in the world through IOT.


Let's talk about how you can control the lights through IOT.

We have these points of possibilities to control your lights/devices.

1) Through the GSM:-

Let's suppose you have a GSM-based system who take the command through GSM. Now, these days everyone has his own mobile.  You need to send an SMS to GSM device which placed in your house.

Once it receives the SMS and read it, and take the action according to that. 

For example, You send  SMS like  "light_1: ON  ".

This SMS received by your house's GSM device, and send an ON command to the light_1. It will on .

If you send "light_1: OFF  ". It will Off. : )

2) Through RF Module:-

In this kind of system, we use RF modules (Radio Frequency module).



"An RF module (radio frequency module) is a (usually) small electronic device used to transmit and/or receive radio signals between two devices. In an embedded system it is often desirable to communicate with another device wirelessly".



In such system, devices are connected with each other and they have a centralized device(Gateway) which is connected to the internet and takes command from there. And send the command to the device, which is received from the server.

For Example:- If we have to handle all street lights through the internet then this concept is used.

We can access all lights and give them the command for On-Off and dim. We can get the information about device health and status. We can collect the data like electronic current, voltage and calculate the power consumption.

Can create a schedule, for a device. like, when the device On, after how much time it goes dim.


when it will off.




We can use these protocols/ technologies.


*Bluetooth

*Zigbee

*Z-Wave

*6LowPAN

*WiFi



In next blog, we will talk about the all above protocols.