Ever thought of controlling any electronic devices with your smart phone? Today I will show how to do it.
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COMPONENTS AND SUPPLIES:
ABOUT THIS PROJECT
Watch how does it Works ?
Watch the video tutorial
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 sending serial data to the Bluetooth module when certain button is pressed. The Bluetooth module at other end receives the data and send to ardunio through the TX pin of Bluetooth module(RX pin of Arduino). The Code fed to Arduino checks the received data and compares.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
Android Application
In this tutorial, I will not be covering tutorial on android app development.You can download the android application from here and the source code of the entire project
How to use the App?
Watch in video how to pair to Bluetooth module
- Download the Application from 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
- Press paired devices
- Select your Bluetooth module from the List (HC 05)
- 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 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.
Arduino Bluetooth Basic Code
Upload Arduino-Bluetooth-Basic.ino sketch to arduino NOTE : Remove Bluetooth module Tx Rx connection before uploading the program.
/*
* 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 pinvoid 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
}
}
Bluetooth arduino connection schematics:
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