Arduino IoT Cloud Home Automation Project using ESP32

(Last Updated On: September 8, 2021)

Arduino IoT Cloud Home Automation, Description:

Arduino IoT

Arduino IoT Cloud Home Automation Project using ESP32- Building a Home Automation system with Arduino IoT Cloud is far easier than building it with the Blynk IoT platform. A dashboard on your cell phone is automatically generated which you can use to control things from remote locations if you have access to the internet. The Arduino IoT Cloud Remote App can be installed on both IoS and Android cell phones. You can also control your electrical devices through a dashboard from your computer screen, now the computer dashboard can be quite handy in situations when you have to monitor and control multiple things.

Arduino IoT

As you can see when I turn ON a button on my computer dashboard, the same button is also turned ON, on the cell phone dashboard. The computer dashboard and cell phone App are working together and make a dual control system which means any electrical device that is turned ON or turned OFF using the computer dashboard can also be turned OFF or turned ON using the cell phone. In this article, you will learn how to make Home Automation system using Arduino IoT cloud and ESP32 WiFi + Bluetooth module.

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In my previous article, I explained how to get started with the Arduino IoT Cloud and explained the maximum basic things including how to register an account, how to install the ArduinoCreateAgent, how to make a dashboard, and how to write a basic program for monitoring a sensor and for controlling an LED. So, I highly recommend reading my previous getting started tutorial on the Arduino IoT Cloud. Without any further delay, let’s get started!!!



Amazon Purchase Links:

12v Adaptor:

ESP32 Wifi + Bluetooth Module:

LM7805 Voltage Regulator:

470uf capacitor:

DC Female Power Jack:

Female Headers:

1n4007 diode:

10k Resistor:

2n2222 NPN transistor

12V SPDT Relay:

Other Tools and Components:

Top Arduino Sensors:

Super Starter kit for Beginners

Digital Oscilloscopes

Variable Supply

Digital Multimeter

Soldering iron kits

PCB small portable drill machines

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ESP32 Home Automation Circuit Diagram:

Arduino IoT

J1 is the female power jack and this is where we connect a 12v adaptor, battery, or solar panel. Two 470uf decoupling capacitors are connected at the input and output sides of the 7805 voltage regulator. The output of the voltage regulator is connected with the 5v pin of the ESP32 module and the ground of the power supply is connected with the ground of the ESP32 module.

These are 12v SPDT type relays and cannot be directly controlled using the ESP32 Module, So, that’s why we need a driver to control these relays. You can use a relay driver IC or you can use a 2n2222 NPN transistor and a 10k resistor. One pin of the relay coil is connected with the collector of the 2n2222 NPN transistor while the other pin of the relay coil is connected with the 12 volts. The emitter of the transistor is connected with the ground while the base is connected with the 10k ohm resistor.

Now to control these relays you simply need to connect these 10k resistors with the ESP32 I/O pins. In this project, I am using the GPIO pins 13, 12, 14, and 27. I will be using the same pins in the programming.

These 4 relays can be used to control 4 different types of loads. The loads should be connected with the common and normally open legs of the relays. For the making watch my video tutorial on the ESP32 & Blynk application based Home Automation Project.

Arduino IoT

Here is my ESP32 Development board which can be used for monitoring different sensors and controlling different DC and AC loads. If you want to make the same development board then you can download the Gerber files. Now, let’s start with the Arduino IoT Cloud. As I have already explained all the steps in my previous getting started tutorial, so there is nothing left to talk about, but still, if you find anything difficult to understand then you can read my article available on electroniclinic.com I will provide a link in the description.



Arduino IoT Cloud Home Automation:

To get started with the Arduino IoT Cloud, first, you will need to create an account, which I have already explained in my getting started tutorial on the Arduino IoT Cloud.

If you have already an account click on the IOT Cloud.

Arduino IoT

Now, click on the CREATE THING in which we will create the variables for the various devices.

Arduino IoT

Creating variables:

Now we will create variables in our case we are using four variables through which we will control four appliances. So, to add the variables click on the add variable, we will go to the setup in which we will click on the ADD VARIABLE.

Arduino IoT

Now, first of all, we will create a variable for the first appliance with the name of device1 then in the select variable type, we will select the Alexa compatible in which we will select the switch.

Arduino IoT

Then we will click on the add variable.

Arduino IoT

In a similar way, we will add a second variable and give it a name device2

Arduino IoT

Then we will add a third variable for the third appliance.

Arduino IoT

Finally, we will add a fourth variable for the fourth appliance.

Arduino IoT

Now, all the variables have been added and now we will configure the device

Arduino IoT



Configuring the device:

Now to add the device click on the add device.

Arduino IoT

Now we will select the device which we will want to add we will select the third party device

Arduino IoT

After that, we will select the ESP32 device and select the ESP32 dev module and click on the continue button.

Arduino IoT

Now give a name to the device which is ESP32 and click on the Next button.

Arduino IoT

Then we will click on the download button in order to use the security key and device id.

Arduino IoT

Then click on the, I saved my device and secret key and click on the continue button.

Arduino IoT

After clicking on the continue button the ESP32 module will be successfully added and click on the done button.

Arduino IoT



Configuring the network:

Now after that, we will configure the network in order to connect to the wifi, we will click on the network button.

Arduino IoT

When we will click on the network we will add the name of the wifi router and password. Then copy the secret key from the downloaded pdf and paste it in the secret key box and click on the save.

Arduino IoT Cloud

Arduino IoT Cloud Dashboard, Creating buttons:

After that click on the dashboards in order to design the various button for controlling the appliances.

Arduino IoT

Now click on the edit button and give the name to the project which is home automation.

Arduino IoT

Then click on the add button in which we will click on the switch.

Arduino IoT

Now give a name to the switch as device 1 and click on the link button

Arduino IoT

When we will click on the link button we will select the variable and click on the link button and the button will be linked to the variable.

Arduino IoT

In a similar way, we will add the buttons for the other three appliances and link the variable for each appliance.

Arduino IoT

After that, we will click on the thing and go back to the menu in order to write the code for each appliance. Now click on the sketch button in order to write the code

Arduino IoT

Now click on the open full editor button to write the code

Arduino IoT




Arduino IoT Complete code:



Uploading the code:

After writing the code we will get a message to install Arduino agent in order to upload the code to the ESP32 so we will click on the learn more and download the agent and install it in the computer.

Arduino IoT

This option shows that the agent is running on the computer

Arduino IoT

Then we will select the board and click on the ok button.

Arduino IoT

Now the board is successfully added and we will click on the upload button

Arduino IoT

After uploading the code to the esp32 we will be able to control the appliances from the mobile dashboard and also from the Laptop dashboard.



Video Tutorial:

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About the Author: Engr Fahad

My name is Shahzada Fahad and I am an Electrical Engineer. I have been doing Job in UAE as a site engineer in an Electrical Construction Company. Currently, I am running my own YouTube channel "Electronic Clinic", and managing this Website. My Hobbies are * Watching Movies * Music * Martial Arts * Photography * Travelling * Make Sketches and so on...

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