Fritzing

DC motor car control by android phone via bluetooth

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asemble the circuit as shown. download Bluetooth RC controller from google play to your phone, open app, connect bluetooth and enjoy.

here is the code again

 

int in1 = 4;
int in2 = 5;
int in3 = 6;
int in4 = 7;
int val;

void setup()
{
pinMode(in1, OUTPUT);
pinMode(in2, OUTPUT);
pinMode(in3, OUTPUT);
pinMode(in4, OUTPUT);
Serial.begin(9600);
}

void loop()
{
while (Serial.available() > 0)
{
val = Serial.read();
}
if( val == 'F') //Forward
{
Serial.println("Forward");
digitalWrite(in1, HIGH);
digitalWrite(in2, LOW);
digitalWrite(in3, HIGH);
digitalWrite(in4, LOW);
}
else if(val == 'B') //Backward
{
Serial.println("Reverse");
digitalWrite(in1, LOW);
digitalWrite(in2, HIGH);
digitalWrite(in3, LOW);
digitalWrite(in4, HIGH);
}
else if(val == 'L') //Left
{
Serial.println("Turn Left");
digitalWrite(in1, LOW);
digitalWrite(in2, LOW);
digitalWrite(in3, HIGH);
digitalWrite(in4, LOW);
}
else if(val == 'R') //Right
{
Serial.println("Turn Right");
digitalWrite(in1, HIGH);
digitalWrite(in2, LOW);
digitalWrite(in3, LOW);
digitalWrite(in4, LOW);
}
else if(val == 'S') //Stop
{
Serial.println("Stop");
digitalWrite(in1, LOW);
digitalWrite(in2, LOW);
digitalWrite(in3, LOW);
digitalWrite(in4, LOW);
}
else if(val == 'I') //Forward Right
{
Serial.println("Forward Right");
digitalWrite(in1, HIGH);
digitalWrite(in2, LOW);
digitalWrite(in3, LOW);
digitalWrite(in4, LOW);
}
else if(val == 'J') //Backward Right
{
Serial.println("Backward Right");
digitalWrite(in1, LOW);
digitalWrite(in2, LOW);
digitalWrite(in3, LOW);
digitalWrite(in4, HIGH);
}
else if(val == 'G') //Forward Left
{
Serial.println("Forward Left");
digitalWrite(in1, LOW);
digitalWrite(in2, LOW);
digitalWrite(in3, HIGH);
digitalWrite(in4, LOW);
}
else if(val == 'H') //Backward Left
{
Serial.println("Backward Left");
digitalWrite(in1, LOW);
digitalWrite(in2, HIGH);
digitalWrite(in3, LOW);
digitalWrite(in4, LOW);
}
}