Watch how does it Work
Before the build check out my blog for more similar tutorials
How Does it Work
Android Application
How to use the App

Published May 23, 2016 © CC BY

Arduino Bluetooth Basic Tutorial

Ever thought of controlling any electronic devices with your smart phone? Today I will show how to do it.

BeginnerProtip15 minutes1,086,621

Things used in this project

Hardware components

Arduino UNO

LED (generic)

Resistor 221 ohm

Android device

HC-05 Bluetooth Module

Software apps and online services

LED Controller

Arduino IDE

Story

Watch how does it Work?

Watch the video tutorial

Before the build check out my blog for more similar tutorials

Link to my link

Let’s Start Building

The circuit is so simple and small, there are only a few connections to be made

Arduino Pins Bluetooth Pins

RX (Pin 0) ———-> TX

TX (Pin 1) ———-> RX

5V ———-> VCC

GND ———-> GND

Connect a LED negative to GND of Arduino and positive to pin 13 with a resistance valued between 220Ω – 1KΩ. And you're done with the circuit

Note: Don’t Connect RX to RX and TX to TX of Bluetooth to Arduino you will receive no data, Here TX means Transmit and RX means Receive

How Does it Work?

HC 05/06 works on serial communication.here the android app is designed to send serial data to the Bluetooth module when a certain button is pressed. The Bluetooth module at the other end receives the data and sends it to Arduino through the TX pin of the Bluetooth module(RX pin of Arduino). The Code fed to Arduino checks the received data and compares it.If received data is 1 the LED turns on turns OFF when received data is 0

Open the serial monitor and watch the received data

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Android Application

In this tutorial, I will not be covering tutorials on android app development.You can download the android application from here and the source code of the entire project. In future, I may be posting it tutorials here http://mgprojecthub.com

How to use the App?

Watch in video how to pair to Bluetooth module

Download the Application form here or here
Pair your device with HC 05/06 Bluetooth module1) Turn ON HC 05/06 Bluetooth module2) Scan for available device3) Pair to HC 05/06 by entering default password 1234 OR 0000
Install LED application on your android device
Open the Application

splash screen

Press paired devices
Select your Bluetooth module from the List (HC 05)

Paring screen

caption (optional)

After connecting successfully
Press ON button to turn ON LED and OFF button to turn OFF the LED

Disconnect button to disconnect from Bluetooth module

This is just a basic tutorial on interfacing Bluetooth module with Arduino This project can be improved to a higher level like Home automation using a smartphone, Smartphone controlled robot, and much more.

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Code

Bluetooh Basic: LED ON OFF

/* 
 *  Bluetooh Basic: LED ON OFF - Avishkar
 *  Coder - Mayoogh Girish
 *  Website - http://bit.do/Avishkar
 *  Download the App : 
 *  This program lets you to control a LED on pin 13 of arduino using a bluetooth module
 */
char Incoming_value = 0;                //Variable for storing Incoming_value
void setup() 
{
  Serial.begin(9600);         //Sets the data rate in bits per second (baud) for serial data transmission
  pinMode(13, OUTPUT);        //Sets digital pin 13 as output pin
}
void loop()
{
  if(Serial.available() > 0)  
  {
    Incoming_value = Serial.read();      //Read the incoming data and store it into variable Incoming_value
    Serial.print(Incoming_value);        //Print Value of Incoming_value in Serial monitor
    Serial.print("\n");        //New line 
    if(Incoming_value == '1')            //Checks whether value of Incoming_value is equal to 1 
      digitalWrite(13, HIGH);  //If value is 1 then LED turns ON
    else if(Incoming_value == '0')       //Checks whether value of Incoming_value is equal to 0
      digitalWrite(13, LOW);   //If value is 0 then LED turns OFF
  }                            
 
}

Credits

Mayoogh Girish

7 projects • 214 followers

Maker Bloger @ http://mgprojecthub.com/

Arduino Bluetooth Basic Tutorial