Mobile Controlled Robot car with Arduino

Mobile Controller Robot using Atmega8

Robot controlled via Mobile/Cellphone with the help of DTMF (Dual Tone Multi Frequency) module is very essential.
Mobile keypad  is used as input control unit of the microcontroller. For controlling the robot, 2 mobile phones are used. One is Connected with robot (it act as call receiver) and another is call sending like remote control.

HOW TO TEST?

1. Place one mobile to robot.
2. Connect cell phone audio jag pin to DTMF input jag.
3. Set mobile phone in auto answering mode.
4. Dial that number correctly.

Now the robot can be controlled from receiving call mobile attached circuit and by pressing the calling mobile keypads of command keys through DTMF module is activated the command of the micro controller to run the robot motor drive circuits.

CONTROL KEYS.

1. Forward = Press Key  2.
2. Backward = Press Key  8.
3. Left = Press Key 4.
4. Right = Press Key  6.
5. Stop = Press Key 5.
Required components.
1. Robot with Atmega8 circuit.
2. AVR Programmer.
3. DTMF Module.
4. Audio cable(Jag to Jag)

PROGRAM FOR ATMEGA8. (Tested)

#include <avr/io.h>
#define F_CPU 16000000UL
#include <util/delay.h>
int main(void)

{
DDRB=0X0F; //PB0, PB1, PB2, PB3 as output
DDRD=0X00; //PD7, PD6, PD5, PD4 connected to DTMF input bits
int Mobile=0;

while(1) // infinite loop

{
Mobile=PIND&0XF0;
if(Mobile==0X20) //Key 2 of cell phone pressed
{
PORTB=0X09; // Forward direction
}

if(Mobile==0X40) // Key 4 of cell phone pressed
{
PORTB=0X01; // Turn left

}

if(Mobile==0X60) // Key 6 of cell phone pressed
{
PORTB=0X08; // Turn right
}

if(Mobile==0X80) // Key 8 of cell phone pressed
{
PORTB=0X06; // Backward Direction
}

if(Mobile==0X50) // Key 5 of cell phone pressed
{
PORTB=0X00; //stop
}
}
}                     //main closed