View source for Arduino/C3/Robot-Control-using-Bluetooth/English


{| style="border-spacing:0;"
| style="background-color:#d9d2e9;border:0.75pt solid #000000;padding:0.176cm;"| Visual Cue
| style="background-color:#d9d2e9;border:0.75pt solid #000000;padding:0.176cm;"| Narration

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 1:
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Welcome to the''' s'''poken tutorial on '''Robot Control using Bluetooth'''

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 2:

Learning Objectives
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| In this tutorial, we will learn about:

* '''Bluetooth Communication'''
* '''HC-05''' Bluetooth Module and
* Controlling a Robot using an Android application
|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 3:

Pre-Requisites
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| To follow this tutorial, you should have a basic knowledge of:

* '''Electronics '''and
* '''C or C++ '''programming language
|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 4:

System Requirements
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| To record this tutorial, I am using:

* '''Ubuntu Linux 16.04''' OS
* '''Arduino UNO''' board
* '''Arduino IDE '''and
* '''Android Phone'''
|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 5:

External Components
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| We require few external components:

* '''HC-05 Bluetooth Module'''
* '''L293D IC'''
We have learnt about the '''L293D Motor Driver IC i'''n the earlier tutorial.

* '''9V Battery with Connector'''
* '''9Volts-1Ampere Adapter'''
|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 6:

'''Bluetooth Communication'''
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| * Bluetooth communication is a '''wireless''' technology.
* It is used to transfer data between different electronic devices.
* It supports data, audio transmission with a range of '''7 to 8 meters'''.
* It is specially designed for short range wireless data communication.<br/> 

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 7:
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| * In this tutorial we will use the '''HC-05 Bluetooth module.'''
* This module has two operating modes, namely '''Data Mode''' and '''AT Command''' '''Mode'''.
* In '''Data Mode''', it can send and receive data from other Bluetooth devices.
* We will be using the '''Data Mode''' in our tutorial.
* '''AT Command '''mode is used when you want to change the setting of the bluetooth module.
* For example, to change the '''Baud Rate''' we can use '''AT Command '''Mode

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 8:
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| This is the assembled Robot.

We have already installed an app called '''car Bluetooth RC '''on '''Android''' phone.

This app will control the movement of the Robot.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| 
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Now we will see how to control the Robot via Bluetooth.

Let us see the circuit connection in detail. 

Do the actual connection with your hardware as explained here.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 9:

Circuit Connection

| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Connect the Arduino board to your computer using Arduino USB cable'''.'''

The '''5V''' pin of the '''Arduino''' is connected to the '''5V''' pin of the '''HC-05''' module. 

The '''ground pin''' of the '''Arduino''' is connected to the '''ground pin''' of the '''HC-05''' '''module'''. 

The '''Rx pin''' of the '''Bluetooth module''' is connected to the '''Tx pin''' of '''Arduino'''. 

The '''Tx pin''' of the '''Bluetooth module''' is connected to the '''Rx pin''' of '''Arduino'''. 

Now, note the blinking of LED in the '''Bluetooth module.'''

This indicates that your '''Bluetooth module''' is switched on.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 10:

Circuit Connection
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Next do the below connections as explained.

'''Pin 16''' of '''L293D IC''' is connected to '''5V''' of '''Arduino'''. 

'''Pins 4,5,12,13 of the L293D IC''' are connected to the '''ground''' terminal. 

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 11:

Circuit Connection
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| * '''Pins 1,2,7 '''of''' L293D IC''' are connected to '''pins 6,3,5 of Arduino''' respectively. 

'''Pins 9,10,15 of L293D IC''' are connected to '''pins 11,10,9 of Arduino''' respectively.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 12:

Circuit Connection
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| * '''One DC motor''' is connected to '''pin 3 and 6''' of '''L293D IC. '''
The '''other DC motor''' is connected to '''pin''' '''11 and 14''' of '''L293D IC. '''

Note: You have to connect the''' DC motors''' of the assembled robot as shown in figure.

Recall that we have soldered a red and black wire to the wire leads of the motors.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 13:

Circuit Connection
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| We require a separate power source for running the '''DC motors.'''

We will use a '''9V battery''' to power the '''DC motors''' as arduino gives only '''5V''' output. 

'''Positive''' terminal of the '''9V battery''' is connected to '''pin 8''' of '''L293D IC. '''

The '''negative''' terminal of the battery is connected to the '''ground''' pin of the '''Arduino'''. 

These are all the connections you must do to perform the tasks shown in this tutorial.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 14:

Live Setup of Robot

| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| * Now place the breadboard and Arduino setup on the chassis.
* This is how I have done the setup of my '''Robot'''. 

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Switch to Arduino IDE
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Now we will write the program in '''Arduino IDE''' for the working of the '''Robot'''.
|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide:

Code Files:
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| * The files used in this tutorial are available in the '''Code Files '''link on this tutorial page. 
* Please download and extract them 
* Make a copy and then use them while practising

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| 
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Open the '''Arduino IDE.'''

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| '''Highlight according to narration'''

| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Type the code as shown: 

These are the variables assigned for the pins on the arduino connected to '''L293D IC. '''

The variable '''serialA''' is used to store the input character received by Bluetooth.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| '''void setup() '''

| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Type the code as shown in the '''void setup''' function.

'''Serial.begin''' function is used to make the Arduino ready to serially exchange messages.

The messages are exchanged at '''9600 baud rate.'''

We will use the function''' pinMode '''to configure the '''pins''' to '''OUTPUT '''mode.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| '''void loop() '''

'''{'''

'''if (Serial.available() > 0)'''

'''{'''

'''serialA = Serial.read();Serial.println(serialA);'''

'''}'''

'''switch (serialA)'''
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Now we will write the code for the '''void loop.'''

The''' void loop '''function will move the '''Robot '''in forward, backward, right and left directions.

'''Bluetooth module''' checks for commands given from the Android app.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| 

| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| These lines of code make the robot move in the forward direction.

These lines of code make the robot turn in the left direction. 

These lines of code make the robot turn in the right direction.

These lines of code make the robot move in a backward direction.

Our program is ready now.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Click on compile and upload button on the toolbar

| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| '''Click''' on the''' compile''' button to verify your''' program'''.

After''' compiling''', a pop-up window will open to save the current program.

I will save it as '''Bluetooth_Robot.'''

Click on the '''save''' button to save the''' '''program.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| 
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Before uploading the program, you must remove the '''Rx''' and '''Tx''' wires connected to '''Arduino'''. 

Now click on the '''upload''' button to upload the current program on''' Arduino'''. 

When you have successfully uploaded the program, '''reconnect'''

the '''Rx''' and '''Tx''' wires to the '''Arduino'''. 

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| 
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Now, remove the arduino’s USB cable from your computer.

For demonstration purpose, I have connected a '''9V-1A adapter''' to run the '''Robot'''. 

It is connected at the Arduino jack available here. 

You can use a power bank or a battery instead, to power the Arduino.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| 
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Next, we will use the app and test the working of the Robot.

Take the Android phone in which you have downloaded the '''Car Bluetooth RC app. '''

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| 
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Let us configure the '''Bluetooth''' in your Android phone.

Go to the '''settings''' option on your phone.

Open the '''Bluetooth '''section.

'''Turn ON''' your phone’s Bluetooth.

Search for nearby devices.

You will find '''HC-05''' as one of the options in the list.

Click on the''' HC-05''' option. It will ask for a password.

The '''default password''' for this bluetooth module is '''1234'''. Type the password.

In some cases, the password of the bluetooth module will be '''0000.'''

Now, your mobile is connected to the '''HC-05 Bluetooth''' module.

You can now observe a different blinking pattern of the LED in the Bluetooth module. 

Turn OFF your phone’s Bluetooth.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| 
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Now, open the '''Car Bluetooth RC app''' in your phone.

The app will prompt to turn ON your phone’s Bluetooth.

Click on '''Allow to Continue.'''

On the top left corner of your phone, click on the arrow.

Find the '''HC-05''' option and click on it.

You can see a message as '''Connected-OK.''' 

It indicates that your phone is now connected to the '''HC-05 Bluetooth Module.'''

Now, it is ready to control the Robot.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| 
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Let us observe the working of the '''Robot'''.

When I press the forward button in the app, we can see the '''Robot''' moves in the forward direction.

When I press the backward button, the '''Robot''' moves in the backward direction.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| 
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| To turn the '''Robot''' towards the right hand side, press the right button in the app.

The right side motor stops rotating and the left side motor continues to rotate. 

This way the Robot turns to the right side.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| 
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Likewise, the Robot will move to the left direction when you press the left button. 

Thus, we can control the movement of the Robot using bluetooth communication.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| 
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| This brings us to the end of this tutorial. Let us summarize. 

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 15:

Summary
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| In this tutorial, we learnt:

* Bluetooth Communication
* HC-05 Bluetooth Module
* Controlling a Robot using an Android application

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| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 16:

About Spoken Tutorial project

| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| The video at the following link summarizes the Spoken Tutorial project.

Please download and watch it.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 17:

Spoken Tutorial workshops
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| The''' Spoken Tutorial Project''' Team:

* conducts workshops and
* gives certificates.

For more details, please write to us.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 18:

Forum for specific questions
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Please post your timed queries in this forum.

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| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| Slide 19:

Acknowledgement
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| The Spoken Tutorial project is funded by MHRD, Government of India.

|-
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| 
| style="border-top:none;border-bottom:0.75pt solid #000000;border-left:0.75pt solid #000000;border-right:0.75pt solid #000000;padding:0.176cm;"| This tutorial has been contributed by FOSSEE and Spoken Tutorial Project, IIT Bombay. 

And this is Saurabh signing off. 

Thanks for watching.

|}