Bluetooth Operated Robot

         Here is a simple robotic vehicle that can be operated by using Bluetooth connection. The Bluetooth module that is used here is HC-05 Master/Slave module. The robot can be controlled using both Android smart phones and Computers via a serial terminal.

         For computers we can use Teraterm, Putty, etc and for Android phones we can use Blueterm or a dedicated Robot Control App (Several such apps are available in PlayStore).

Components Required:

      1.      Arduino Compatible Board – GR Sakura

      2.       HC-05 Bluetooth module

            3.       L293D Motor Driver
      4.       DC motors and Wheels
      5.       Battery

Working:

                Connect power supply to the circuit. Open the serial terminal software/app after turning On the Bluetooth – Teraterm/Putty in terms of computer or Blueterm in terms of Android phones. Search for the HC-05 device and pair with it by giving the default password of HC-05 ‘1234’. Below are the control signals,

                                                                8 – Move Forward

                                                                4 – Turn Left

                                                                6 – Turn Right

                                                                2 – Move Back

                                                                5 – Stop

Note – You can change the control signals as you wish by changing the code

Code Structure:

#include 'rxduino.h'

#include 'iodefine_gcc63n.h'

char a;

int main()

{

                Serial.begin(115200,SCI_SCI0P2x);

                delay(1000);

                /* give the pin details here that controls the dc motors via L293D */

while(1)

                {

                                if(Serial.available())

                                {

                                                a=Serial.read();

                                                if(a=='8')

                                                {

                                                                /* give the pin configuration to turn on the dc motors such that the robot moves forward */

             }

                                                if(a=='4')

                                                {

                                                                /* give the pin configuration to turn on the dc motors such that the robot turns left */

            }

                                                if(a=='6')

                                                {

                                                                /* give the pin configuration to turn on the dc motors such that the robot turns right */

            }

                                                if(a=='2')

                                                {

                                                                /* give the pin configuration to turn on the dc motors such that the robot moves backward */

                                                 }

                                                if(a=='5')

                                                {

                                                                /* give the pin configuration to turn off the dc motors such that the robot stops */

                                                }

                                }

                }

}

                                      

Video Demo:

                                                                

For info on L293D - Driving DC motors

For info on HC-05 - Interfacing HC-05