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Arduino AND Bluetooth HC-05 Connecting easily - AllShow All Items

Hello Every body , This is my first artical on Instructable.com , I'm so happy for that , and I will start by How

to connect arduino with bluetooth , I suffered a lot of problems when I try to connect it as the website and

instructable artical did , So i decided To share my experience with You

The bluetooth module I will use today is HC-05 which is so familiar and cheap ,

Most tutorial on The website Connect the bluetooth with default Rx and Tx on the arduino Board , I faced a

lot of problem and bluetooth didn't work will .

But arduino support something Called Software Serial , which allow You to change any arduino board pin

to serial pin

http:/rduino.cc/en/Reference/SoftwareSerial

so After reading this article you will be able to:

1) Connect arduino Board with PC By Bluetooth , to send and receive data .

2)Connect arduino Board with Any android device .

so you can send your information , Like Sensors reading , from arduino to PC Or android device , and you

can build your Home automation system by bluetooth , and controlling your robot wirelessly

Step 1: Material and connection


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you need to do this experiment :

1) Arduino Board " I used Arduino Uno ".

2) Bluetooth module HC-05.3)Solderless jumper.

4)Bread Board .

5)Battery 9V "Optional".

The connction between Arduino and bluetooth is like the schematic above


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Step 2: Connect Arduino with PC


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We now want to send or receive Data between arduino and computer , first we need to make

a Communication link to Definition arduino Board to the computer .

We will need a software called Tera Term to show the data received or what we want to send through it .

You can download Tera Term or any terminal emulator software , you can download Tera term from this

link :

http://hp.vector.co.jputhors/VA002416/ttermv14.zip

To make a link between your Arduino and bluetooth , do the following :

1) Go to the bluetooth icon , right click and select Add a Device

2) Search for new device , Our bluetooth module will appear as HC-05 , and add it

3) The pairing code will be 1234 .

4)after make a pairing , we can now program the arduino and upload a sketch to send or receive data

from Computer.


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Step 3: Arduino Code

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As I mentioned before , I will use software serial library to make pin D10 & D11 As Tx & Rx instead of

using the default Rx and tx " D0 &D1 On most arduino Board " .

this program below allow us to control LED connected to D13 To blink on/off , by press # 1 from PC

Keyboard the LED blink on , and if we press 0 LED blink off !


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To send the Control commands from Computer to arduino , Go to the tera term , Run it , and

choose Serial , and select the bluetooth Serial from the list as Shown on the picture .

The code below :

// This program shown how to control arduino from PC Via Bluetooth// Connect ...

// arduino>>bluetooth

// D11 >>> Rx

// D10 >>> Tx

//Written By Mohannad Rawashdeh

//for http://www.genotronex.com/

// you will need arduino 1.0.1 or higher to run this sketch

#include // import the serial library

SoftwareSerial Genotronex(10, 11); // RX, TX

int ledpin=13; // led on D13 will show blink on / off

int BluetoothData; // the data given from Computer

void setup() {

// put your setup code here, to run once:

Genotronex.begin(9600);

Genotronex.println("Bluetooth On please press 1 or 0 blink LED ..");

pinMode(ledpin,OUTPUT);

}

void loop() {

// put your main code here, to run repeatedly:

if (Genotronex.available()){BluetoothData=Genotronex.read();

if(BluetoothData=='1'){ // if number 1 pressed ....

digitalWrite(ledpin,1);

Genotronex.println("LED On D13 ON ! ");

}

if (BluetoothData=='0'){// if number 0 pressed ....

digitalWrite(ledpin,0);


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Genotronex.println("LED On D13 Off ! ");

}

}

delay(100);// prepare for next data ...

}

After uploading This sketch go to tera term and press 0 or 1 and see the results

This Video show the results of this code .

Step 4: Connect arduino To android Device

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after we finished from connecting arduino with PC By bluetooth , let's move to how we can connect

arduino To android device .

at first you need a terminal emulator on your andriod device to send or receive data to arduino .

You can download this app from Google play .

https://play.google.com/storepps/details?id=arduino.bluetooth.terminal&feature=search_result#?

t=W251bGwsMSwxLDEsImFyZHVpbm8uYmx1ZXRvb3RoLnRlcm1pbmFsIl0.

https://www.youtube.com/watch?v=9KvocNmcklc


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after that , you can use the same arduino Sketch and control LED Blinking on or Off from android device .

just type and t send #1 to make LED Blink on , or 0 to blink off .

this video below show how to control arduino I/O from android tablet .

Step 5: Receiving Data from arduino

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The last arduino Sketch that i wrote , used to send commands from PC Or android device to android ,

Now in this program i will use arduino to Calculate the time since the start of the program in second , and

send it Via bluetooth to any pairing device .

the code below

// This program shown how to control arduino from PC Via Bluetooth

// Connect ...

// arduino>>bluetooth

// D11 >>> Rx

// D10 >>> Tx

//Written By Mohannad Rawashdeh

//for http://www.genotronex.com/

// you will need arduino 1.0.1 or higher to run this sketch

#include // import the serial library

SoftwareSerial Genotronex(10, 11); // RX, TX

int ledpin=13; // led on D13 will show blink on / off

long previousMillis = 0; // will store last time LED was updated

// the follow variables is a long because the time, measured in miliseconds,

// will quickly become a bigger number than can be stored in an int.

long interval = 1000; // interval at which to blink (milliseconds)

int ledState = LOW; // ledState used to set the LED

long Counter=0; // counter will increase every 1 second

void setup() {


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// put your setup code here, to run once:

Genotronex.begin(9600);

Genotronex.println("Bluetooth On please wait....");

pinMode(ledpin,OUTPUT);

}

void loop() {// put your main code here, to run repeatedly:

unsigned long currentMillis = millis();

if(currentMillis - previousMillis > interval) {

// save the last time you blinked the LED

previousMillis = currentMillis;

Counter+=1;

Genotronex.println(Counter);

// if the LED is off turn it on and vice-versa:

if (ledState == LOW)

ledState = HIGH;

else

ledState = LOW;

// set the LED with the ledState of the variable:

digitalWrite(ledpin, ledState);

}

}

at the end , You can visit the orginal artical in arabic language on my website

http://www.genotronex.com/

Hope my first artical here is useful to you , thank you for your time ,

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