Published May 25, 2021 © LGPL

How to Build a Bluetooth Controlled Home Automation

In this project, let’s see how to build a Bluetooth based home automation project.

IntermediateFull instructions provided1.5 hours438

How to Build a Bluetooth Controlled Home Automation

Things used in this project

Hardware components

PCBWay Custom PCB

HC-05 Bluetooth Module

Hi-Link - 5v

5v Relay

ATMEGA328P IC

28 Pin IC Base

16MHz Crystal Oscillator

BC547 Transistor

Capacitor 22 pF

5 mm LED: Green

5 mm LED: Red

1N4007 – High Voltage, High Current Rated Diode

Resistor 1k ohm

3 Pin Screw Connector

2 Pin Screw Connector

Software apps and online services

Arduino IDE

Bluetooth Control for Arduino

Hand tools and fabrication machines

Soldering iron (generic)

Solder Wire, Lead Free

Solder Flux, Soldering

Story

PCB:-

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Therefore, case you want your own PCB, you can obtain through this link on PCBWay.com. You can also order good quality PCBS from PCBWay.com at low cost. In addition to the standard pcbs, we could also support advanced Pcbs, FPC/rigid -flex Pcbs, rapid-rpototyping and other related services that could meet your needs to the most extent.

PCB order steps on PCBWay:

Visit the website: www.pcbway.com
Click PCB Instant Quote
Clickquick-order PCB Upload the gerber file by clicking "+Add Gerber File" and wait until the gerber file is finished
uploading Set the PCB specifications as you wish, starting from the number of PCBs, the number of layers, thickness, color and others
After that, look at the left, it will display the estimated cost, processing time and delivery service selected
Click Save to cart

ASSEMBLING COMPONENTS ON PCB:-

Connect all components to the PCB

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Now you need to program the IC atmega328 and set it to the 28 pin IC base of the PCB.Let's see how.

PROGRAMING:-

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I am programming atmega328p using Arduino Uno here

Connect Arduino Uno on PC
Open Arduino IDE (Software)
Then Go To Tools>Board>Select Arduino Uno
Select Correct Port
Upload Code Below

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After programming, unplug the ATMEGA328P from the Arduino and set it to the 28 pin IC socket on the PCB.

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With this, all work is completed...

SAMPLE CONNECTION:-

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APP:-

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Download and install "Bluetooth Control for Arduino"
When you turn on Bluetooth you will see "HC-05"
When you click on it, you will be asked for the password and then type the password is 1234
Open the app
At the top you will see some Bluetooth device names, select HC-05
Click on the "Connection" button

Now our Bluetooth module is connected to the phone.....

If you have any doubts, watch this video (Click Here)

WORKING:-

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Watch this video (Click Here)

THANKYOU

Code

CODE

/*
Relay IN1 connected to PinOut 2 Arduino
Relay IN2 connected to PinOut 3 Arduino
Relay IN3 connected to PinOut 4 Arduino
Relay IN4 connected to PinOut 5 Arduino
--->you can connected to relay modul 4 channel
Serial data sending from Arduino Bluetooth Relay 4CH.apk
data '1'-'4' to on is Ralay CH 1-4
data 'A'-'D' to off is Ralay CH 1-4
data '9' to on ALL CH 1-4
data 'I' to off ALL CH 1-4
*/

#define relay1 2
#define relay2 3
#define relay3 4
#define relay4 5
char val;
void setup() {
 pinMode(relay1,OUTPUT);
 pinMode(relay2,OUTPUT);
 pinMode(relay3,OUTPUT);
 pinMode(relay4,OUTPUT);
 digitalWrite(relay1,LOW);
 digitalWrite(relay2,LOW);
 digitalWrite(relay3,LOW);
 digitalWrite(relay4,LOW);
 Serial.begin(9600);
 Serial.begin(9600);
}
void loop() {
//cek data serial from bluetooth android App
if( Serial.available() >0 ) {
 val = Serial.read();
 Serial.println(val); 
}
//Relay is on
 if( val == '1' ) {
 digitalWrite(relay1,HIGH); }
 else if( val == '2' ) {
 digitalWrite(relay2,HIGH); }
 else if( val == '3' ) {
 digitalWrite(relay3,HIGH); }
 else if( val == '4' ) {
 digitalWrite(relay4,HIGH); }
 //relay all on
 else if( val == '9' ) {
 digitalWrite(relay1,HIGH);
 digitalWrite(relay2,HIGH);
 digitalWrite(relay3,HIGH);
 digitalWrite(relay4,HIGH);
}
//relay is off
 else if( val == 'A' ) {
 digitalWrite(relay1,LOW); }
 else if( val == 'B' ) {
 digitalWrite(relay2,LOW); }
 else if( val == 'C' ) {
 digitalWrite(relay3,LOW); }
 else if( val == 'D' ) {
 digitalWrite(relay4,LOW); }
 //relay all off 
 else if( val == 'I' ) {
 digitalWrite(relay1,LOW);
 digitalWrite(relay2,LOW);
 digitalWrite(relay3,LOW);
 digitalWrite(relay4,LOW);
}
}
/*
Relay IN1 connected to PinOut 2 Arduino
Relay IN2 connected to PinOut 3 Arduino
Relay IN3 connected to PinOut 4 Arduino
Relay IN4 connected to PinOut 5 Arduino
--->you can connected to relay modul 4 channel
Serial data sending from Arduino Bluetooth Relay 4CH.apk
data '1'-'4' to on is Ralay CH 1-4
data 'A'-'D' to off is Ralay CH 1-4
data '9' to on ALL CH 1-4
data 'I' to off ALL CH 1-4
*/

#define relay1 2
#define relay2 3
#define relay3 4
#define relay4 5
char val;
void setup() {
 pinMode(relay1,OUTPUT);
 pinMode(relay2,OUTPUT);
 pinMode(relay3,OUTPUT);
 pinMode(relay4,OUTPUT);
 digitalWrite(relay1,LOW);
 digitalWrite(relay2,LOW);
 digitalWrite(relay3,LOW);
 digitalWrite(relay4,LOW);
 Serial.begin(9600);
 Serial.begin(9600);
}
void loop() {
//cek data serial from bluetooth android App
if( Serial.available() >0 ) {
 val = Serial.read();
 Serial.println(val); 
}
//Relay is on
 if( val == '1' ) {
 digitalWrite(relay1,HIGH); }
 else if( val == '2' ) {
 digitalWrite(relay2,HIGH); }
 else if( val == '3' ) {
 digitalWrite(relay3,HIGH); }
 else if( val == '4' ) {
 digitalWrite(relay4,HIGH); }
 //relay all on
 else if( val == '9' ) {
 digitalWrite(relay1,HIGH);
 digitalWrite(relay2,HIGH);
 digitalWrite(relay3,HIGH);
 digitalWrite(relay4,HIGH);
}
//relay is off
 else if( val == 'A' ) {
 digitalWrite(relay1,LOW); }
 else if( val == 'B' ) {
 digitalWrite(relay2,LOW); }
 else if( val == 'C' ) {
 digitalWrite(relay3,LOW); }
 else if( val == 'D' ) {
 digitalWrite(relay4,LOW); }
 //relay all off 
 else if( val == 'I' ) {
 digitalWrite(relay1,LOW);
 digitalWrite(relay2,LOW);
 digitalWrite(relay3,LOW);
 digitalWrite(relay4,LOW);
}
}

Credits

Pro Maker_101

13 projects • 13 followers

Electrical,Electronics,DIY

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How to Build a Bluetooth Controlled Home Automation

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

PCB:-

ASSEMBLING COMPONENTS ON PCB:-

PROGRAMING:-

APP:-

WORKING:-

Schematics

SCHEMATIC DIAGRAM

Code

CODE

Credits

Pro Maker_101

Comments

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How to Build a Bluetooth Controlled Home Automation

How to Build a Bluetooth Controlled Home Automation

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

PCB:-

ASSEMBLING COMPONENTS ON PCB:-

PROGRAMING:-

APP:-

WORKING:-

Schematics

SCHEMATIC DIAGRAM

Code

CODE

Credits

Pro Maker_101

Comments

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