4 Channel Bluetooth & Manual Control Home-Automation System

The article is being published in collaboration with JLCPCB. It is one of the most experienced PCB manufacturers with more than a decade in the field of PCB prototype and fabrication, they are committed to meeting the needs of their customers from different industries in terms of quality, delivery, cost-effectiveness and any other demanding requests.

Introduction

In this article we are going to make android app control home-automation system using esp32 inbuilt bluetooth feature along with this we can also control our home-appliances through regular switch buttons that we generally uses in our homes.

Our android application will communicate to the esp32 via bluetooth, hence no WIFI is required.

For making of this project I will use my newly design 4 Node SMT home-automation PCB.

App will directly communicate to the esp32 via bluetooth.

The only down side of this home-automation system is, it will only work in local range.

If you want to purchase this 4 Node SMT home-automation PCB then connect me.

Email: technolabcreationindia@gmail.com

We can give input to control our devices via Manual switch button.

This PCB is compatible for all the smart speakers available in the market like Amazons Alexa, google home and Apples SIRI.

Designing the PCB.

To design the circuit and PCB, we used EasyEDA which is a browser based software to design PCBs.

Designing the circuit works like in any other circuit software tool, you place some components and you wire them together.

Then, you assign each component to a footprint.

Having the parts assigned, place each component. When you’re happy with the layout, make all the connections and route your PCB.

Save your project and export the Gerber files.

Ordering the PCBs at jlcpcb.

This project is sponsored by jlcpcb. jlcpcb is a full feature Printed Circuit Board manufacturing service.

Turn your DIY breadboard circuits into professional PCBs– get 10 boards for approximately $5 + shipping (which will vary depending on your country).

Once you have your Gerber files, you can order the PCB. Follow the next steps.

1. Download the Gerber files –click here to download the.zip file.

2. Go to jlcpcb website and Click on Quote Now button.

3.Upload the gerber file you downloaded in the last step. Upload the.zip file or you can also drag and drop the gerber files.

After uploading the zip file, you’ll see a success message at the bottom if the file is successfully uploaded. You can review the PCB in the Gerber viewer to make sure everything is good.

jlcpcb can grab all the PCB details and automatically fills them for you.

To place the order, click on “SAVE TO CART” button.

Now select the shipping method, the one you prefer and has cost efficient.

Before finalizing your order you can use the promotional code JLC-REBE to get a discount and then click pay.

Let's Make it...!

Now grab all the components whose list is mention below, and soldered on the PCB.

1.ESP32 Chip.

2.Highlink (HLK-5M05).

3.Relay (5volts).

4.Terminal connectors.

5.Optocoupler(PC817).

6.DPDT Switch.

After soldiering rest of components PCB look like this neat, clean and well arranged.

CODE

To flash the code into ESP32 chip, I will use ESP32 development board.

Make the connections according to below schematic.

Make the connections according to above schematic.

Download the code and open in arduino ide.

Here in this section of code, you have the enter the name of your bluetooth device.

this bluetooth device name will appear when we pair our smartphone with esp32.

Now this code is ready, hit upload button after selecting right board and COM PORT.

Smartphone Application Configuration.

Download APK file of this mobile application from this link and install in your smartphone.

Now open bluetooth setting of your phone and click on pair new device.

Here a bluetooth device with the same name that we given in the code

Now tap on this and pair your phone with the esp32.

After successful pairing the bluetooth device.

Now open the app again and tap on connect and select esp32.

Here "bluetooth is connect" message shown that means esp32 is successfully connected to the app.

Connection of Switches & Bulbs.

Connect all the bulb and switches as Shown in the Schematics below.

Now your homeautomation system is ready to work.

If you have any question or queries regarding this project please comment below.

Video Tutorial.

Thank you so much for reading.