Internet of Things using Arduino Part-1 (Introduction)

Learn how to implement the communication between smartphones and also to control various home appliances wirelessly. This can be done effectively by Internet of Things using Arduino.


We are dealing with the Bluetooth model in which we need to connect it to the internet. So, we can access the home appliances device remotely.

Now let us tell you about the project we will demonstrate how to control the light and fan with our Arduino using relay and Bluetooth module.

In this blog, we will attempt to show you how to connect an Arduino to an android phone via Bluetooth and then use the voice command to control high voltage devices using relays.

It is a really interesting project and also very dangerous as we are going to deal with high voltage i.e. 220volts.

Please be careful when you are dealing with current.

We will answer a few basic question about relay module which hits you when you are a novice.

If you have ever had a project that required an interface with a high powered device that requires high current level and DC or AC voltage you have probably already discovered the attempting to control those devices directly with your Arduino, Raspberry Pi or other micro-controller can be a real challenge.

Above all, this board is designed to interface easily without consuming much current on your IO pin with your 5 volt IO interface.

Why do we need to use relay for controlling light and fan.

AC is alternating current, 220 volt which powers the light and fan. However, Arduino cannot control high volt an ampere. A relay can do this job which is a soul design for it. Hence, we are using relay to control to control high powered devices.

Introduction about Internet of Things

Now let us discuss about internet of things.

If you listen to big business and big technology then the next big thing will be the Internet of Things.

What’s that, the clue is the name.

It\’s about connecting objects to the Internet.

In addition, one of these big businesses say there will be 50 billion objects online by 2020.

Though they have also said there will be trillion and of course they have a vested interest in connecting them but whatever the numbers a lot of objects are going to get connected.

It is a world of smart cities and smart everything. Also it is full of jargon and acronyms like RFID NFC and QR codes.

It is a world of sensors embedded in bridges so they can report when they need maintaining. A world of sensors in roads so that they can report on the weather or accidents.

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The group of people thinking about the internet of things enthusiastic and inventors who are building their own Internet connected things are being connected with the intelligence to the world in their own ways.

Moreover, these people are sometimes called makers of hardware hackers.

So, they are not the kind of hackers who break into people\’s phones.

They are the kind of hackers that like taking things apart so they can understand them repair them and improve them.

All sorts of things not just computers anything technological, It\’s not a new phenomenon of course but it is how some new energy and coherence Recently you do things like Make magazine and events like the Makers Faire.

And because of the invention of a little device called the Arduino. the Arduino is a little cheapest device that allows you to easily connect some electronic thing You have made to your computer and to the Internet and it brings all sorts of madcap invention to the internet of things. it does for making connected hardware What blogging did for publishing makes it easy and liberates ideas.

Hardware hackers are the kind of people who strap ordinary cameras to weather balloons to photograph space give them things like the Arduino.

I always think the big difference between the makers and the corporate Internet of Things is that the IoT people are trying to make the world more efficient and controlled and the makers are trying to make it more personal And Magic.