Arduino/C3/Robot-Control-using-Bluetooth/English-timed
From Script | Spoken-Tutorial
| Time | Narration |
| 00:01 | Welcome to the spoken tutorial on Robot Control using Bluetooth. |
| 00:06 | In this tutorial, we will learn about: |
| 00:09 | Bluetooth Communication |
| 00:11 | HC-05 Bluetooth Module and |
| 00:14 | Controlling a Robot using an Android application |
| 00:19 | To follow this tutorial, you should have basic knowledge of:
Electronics and C or C++ programming language |
| 00:29 | To record this tutorial, I am using: |
| 00:32 | Ubuntu Linux 16.04 OS |
| 00:36 | Arduino UNO board |
| 00:38 | Arduino IDE and Android Phone |
| 00:43 | We require few external components: |
| 00:47 | HC-05 Bluetooth Module |
| 00:50 | L293D IC |
| 00:54 | We have learnt about the L293D Motor Driver IC in the earlier tutorial. |
| 01:00 | 9V Battery with Connector |
| 01:03 | 9Volts-1Ampere Adapter |
| 01:06 | Bluetooth communication is a wireless technology. |
| 01:10 | It is used to transfer data between different electronic devices. |
| 01:15 | It supports data, audio transmission with a range of 7 to 8 meters. |
| 01:21 | It is specially designed for short range wireless data communication. |
| 01:26 | In this tutorial we will use the HC-05 Bluetooth module. |
| 01:32 | This module has two operating modes, namely Data Mode and AT Command Mode. |
| 01:40 | In Data Mode, it can send and receive data from other Bluetooth devices. |
| 01:46 | We will be using the Data Mode in our tutorial. |
| 01:50 | AT Command mode is used when you want to change the setting of the Bluetooth module. |
| 01:56 | For example, to change the Baud Rate we can use AT Command Mode |
| 02:01 | This is the assembled Robot. |
| 02:05 | We have already installed an app called Car Bluetooth RC on Android phone. |
| 02:11 | This app will control the movement of the Robot. |
| 02:15 | Now we will see how to control the Robot via Bluetooth. |
| 02:20 | Let us see the circuit connection in detail. |
| 02:24 | Do the actual connection with your hardware as explained here. |
| 02:28 | Connect the Arduino board to your computer using Arduino USB cable. |
| 02:34 | The 5Volt pin of the Arduino is connected to the 5Volt pin of the HC-05 module. |
| 02:42 | The ground pin of the Arduino is connected to the ground pin of the HC 05 module. |
| 02:49 | The Rx pin of the Bluetooth module is connected to the Tx pin of Arduino. |
| 02:55 | The Tx pin of the Bluetooth module is connected to the Rx pin of Arduino. |
| 03:01 | Now, note the blinking of LED in the Bluetooth module. |
| 03:06 | This indicates that your Bluetooth module is switched ON. |
| 03:10 | Next do the below connections as explained. |
| 03:14 | Pin 16 of L293D IC is connected to 5Volt pin of Arduino. |
| 03:22 | Pins 4,5,12,13 of the L293D IC are connected to the ground terminal. |
| 03:32 | Pins 1,2,7 of L293D IC are connected to pins 6,3,5 of Arduino respectively. |
| 03:45 | Pins 9,10,15 of L293D IC are connected to pins 11,10,9 of Arduino respectively. |
| 03:57 | One DC motor is connected to pin 3 and 6 of L293D IC. |
| 04:05 | The other DC motor is connected to pin 11 and 14 of L293D IC. |
| 04:13 | Note: You have to connect the DC motors of the assembled Robot as shown in figure. |
| 04:21 | Recall that we have soldered a red and black wire to the wire leads of the motors. |
| 04:29 | We require a separate power source for running the DC motors. |
| 04:34 | We will use a 9V battery to power the DC motors as Arduino gives only 5Volt output. |
| 04:43 | Positive terminal of the 9V battery is connected to pin 8 of L293D IC. |
| 04:52 | The negative terminal of the battery is connected to the ground pin of the Arduino. |
| 04:59 | These are all the connections you must do to perform the tasks shown in this tutorial. |
| 05:07 | Now place the breadboard and Arduino setup on the chassis. |
| 05:12 | This is how I have done the setup of my Robot. |
| 05:16 | Now we will write the program in Arduino IDE for the working of the Robot. |
| 05:21 | The files used in this tutorial are available in the Code Files link on this tutorial page. |
| 05:28 | Please download and extract them. Make a copy and then use them while practising |
| 05:35 | Open the Arduino IDE. |
| 05:37 | Type the code as shown. |
| 05:41 | These are the variables assigned for the pins on the Arduino connected to L293D IC. |
| 05:50 | The variable serialA is used to store the input character received by Bluetooth. |
| 05:57 | Type the code as shown in the void setup function. |
| 06:02 | Serial dot begin function is used to make the Arduino ready to serially exchange messages. |
| 06:10 | The messages are exchanged at 9600 baud rate. |
| 06:15 | We will use the function pinMode to configure the pins to OUTPUT mode. |
| 06:21 | Now we will write the code for the void loop. |
| 06:25 | The void loop function will move the Robot in forward, backward, right and left directions. |
| 06:33 | Bluetooth module checks for commands given from the Android app. |
| 06:38 | These lines of code make the robot move in the forward direction. |
| 06:43 | These lines of code make the robot turn in the left direction. |
| 06:48 | These lines of code make the robot turn in the right direction. |
| 06:53 | These lines of code make the robot move in a backward direction. |
| 06:58 | Our program is ready now. |
| 07:02 | Click on the Compile button to verify your program. |
| 07:05 | After compiling, a pop-up window will open to save the current program. |
| 07:10 | I will save it as Bluetooth underscore Robot. |
| 07:14 | Click on the Save button to save the program. |
| 07:18 | Before uploading the program, you must remove the Rx and Tx wires connected to Arduino. |
| 07:26 | Now click on the Upload button to upload the current program on Arduino. |
| 07:33 | When you have successfully uploaded the program reconnect the Rx and Tx wires to the Arduino. |
| 07:42 | Now, remove the Arduino’s USB cable from your computer. |
| 07:47 | For demonstration purpose, I have connected a 9Volt 1 Amphere adapter to run the Robot. |
| 07:53 | It is connected at the Arduino jack available here. |
| 07:58 | You can use a power bank or a battery instead, to power the Arduino. |
| 08:03 | Next, we will use the app and test the working of the Robot. |
| 08:09 | Take the Android phone in which you have downloaded the Car Bluetooth RC app. |
| 08:16 | Let us configure the Bluetooth in your Android phone. |
| 08:20 | Go to the Settings option on your phone. |
| 08:23 | Open the Bluetooth section. |
| 08:26 | Turn ON your phone’s Bluetooth. |
| 08:30 | Search for nearby devices. |
| 08:34 | You will find HC 05 as one of the options in the list. |
| 08:40 | Click on the HC 05 option. It will ask for a password. |
| 08:47 | The default password for this Bluetooth module is 1234. Type the password. |
| 08:55 | In some cases, the password of the Bluetooth module will be 0000. |
| 09:02 | Now, your mobile is connected to the HC-05 Bluetooth module. |
| 09:08 | You can now observe a different blinking pattern of the LED in the Bluetooth module. |
| 09:14 | Turn OFF your phone’s Bluetooth. |
| 09:17 | Now, open the Car Bluetooth RC app in your phone. |
| 09:23 | The app will prompt to turn ON your phone’s Bluetooth. |
| 09:27 | Click on Allow to Continue. |
| 09:30 | On the top left corner of your phone, click on the arrow. |
| 09:34 | Find the HC 05 option and click on it. |
| 09:39 | You can see a message as Connected OK. |
| 09:43 | It indicates that your phone is now connected to the HC 05 Bluetooth Module. |
| 09:49 | Now, it is ready to control the Robot. |
| 09:53 | Let us observe the working of the Robot. |
| 09:57 | When I press the forward button in the app, we can see the Robot moves in the forward direction. |
| 10:04 | When I press the backward button, the Robot moves in the backward direction. |
| 10:09 | To turn the Robot towards the right hand side, press the right button in the app. |
| 10:14 | The right side motor stops rotating and the left side motor continues to rotate. |
| 10:20 | This way the Robot turns to the right side. |
| 10:24 | Likewise, the Robot will move to the left direction when you press the left button. |
| 10:30 | Thus, we can control the movement of the Robot using bBluetooth communication. |
| 10:36 | This brings us to the end of this tutorial. Let us summarize. |
| 10:41 | In this tutorial, we learnt:
Bluetooth Communication, HC 05 Bluetooth Module and Controlling a Robot using an Android application |
| 10:54 | The video at the following link summarizes the Spoken Tutorial project.
Please download and watch it. |
| 11:02 | The Spoken Tutorial Project Tea conducts workshops and gives certificates.
For more details, please write to us. |
| 11:11 | Please post your timed queries in this forum. |
| 11:15 | The Spoken Tutorial project is funded by MHRD, Government of India. |
| 11:21 | This tutorial has been contributed by FOSSEE and Spoken Tutorial Project, IIT Bombay.
And this is Saurabh signing off. Thanks for watching. |
