Overview
Things
Story
Schematics
Code
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Comments(4)

Team KAST Tech: Khaled Md Saifullah, Shahadat Hossain Afridi, Taisir Jibian Rahi

Published August 3, 2019

Bluetooth Controlled Home Light

This is a simple project based on Arduino. In this project, an AC light can be controlled with the help of our Android phone.

IntermediateFull instructions provided3 hours20,508

Things used in this project

Hardware components

Arduino UNO

ControlEverything.com 4-CHANNEL RELAY CONTROLLER FOR I2C

HC-05 Bluetooth Module

LED Light Bulb, Frosted GLS

Power Supply Accessory, Interchangeable AC Input Plug

Breadboard (generic)

Jumper wires (generic)

Rocker Switch, Non Illuminated

Software apps and online services

Arduino IDE

Story

Objective

The objective of this project is to build up a system to operate an AC light by using our Android phone.

Connections

A) Connections between Bluetooth Module and Arduino

+5V(Arduino) to +5V(Bluetooth)
GND(Arduino) to GND(Bluetooth)
RX(Arduino) to TX(Bluetooth)
TX(Arduino) to RX(Bluetooth)

B) Connections between Relay and Arduino

+5V(Arduino) to VCC(Relay)
GND(Arduino) to GND(Relay)
Digital Pin 8(Arduino) to IN1(Relay)
Digital Pin 9(Arduino) to IN2(Relay)

C) Connections between Relay, Switch board and Bulb

NO(Normally Open) pin(Relay) to Bulb-1
Common pin(Relay) to Switch Board(Switch-1)
NO(Normally Open) pin(Relay) to Bulb-2
Common pin(Relay) to Switch Board(Switch-2)
GND(Bulb-1) to GND(AC Supply - Negative Terminal)
GND(Bulb-2) to GND(AC Supply - Negative Terminal)
Switch Board(Switch-1) to AC Supply - Positive Terminal
Switch Board(Switch-2) to AC Supply - Positive Terminal

Bluetooth Application Setup

We have used an Android Application named "Bluetooth Electronics"

Google Play Store Link: https://play.google.com/store/apps/details?id=com.keuwl.arduinobluetooth

First download and install the application from "Play Store"

Andoid Application

Edit a new panel

Add new panel

Add 2 switches and edit their Turn On Status according to the code

Add 2 switches

Now click on the "Connect" button and select "Bluetooth Classic" option then click "Next" button

Connect with Bluetooth

After that pair with this application with "HC-05 Bluetooth Module" and click "Done" button. Finally Click "Run" button to start working with this app.

Pairing

Warning

Do not touch any wires while connecting the system with AC Supply
Do not disconnect any connections during powering up the system.
Complete all the connections properly.

Code

bluetoothControlledAC_Light.ino

int input1=8;
int input2=9;

void setup() {
 pinMode(input1, OUTPUT);
 pinMode(input2,OUTPUT);
 Serial.begin(9600);
 }
 
void loop() {
  
 if(Serial.available()>0)
   {     
      char data= Serial.read(); 
      switch(data)
      {
        case 'a': digitalWrite(input1, HIGH);
        break;
        
        case 'b': digitalWrite(input1, LOW);
        break;
        
        case 'c': digitalWrite(input2, HIGH);
        break;
        
        case 'd': digitalWrite(input2, LOW);
        break;
        
        default : break;
      }
      Serial.println(data);
   }
   delay(50);
}