//simple Tx on pin D12

//..................................
#include <VirtualWire.h> // this library makes it very easy to send a character wich allows the motors to be active.
 // First we give all the inputs or outputs a name.
 int en1 = 5;
 int en2 = 6;
 int in1 = 9;
 int in2 = 10;
 int in3 = 7;
 int in4 = 8;
 int light1=3;
 int light2=4;
 int motorPin[] = {3,4, 5, 6, 7, 8, 9, 10};//array for storing pin nos

void setup()
{
    Serial.begin(9600);  // Debugging only
    Serial.println("setup");
    vw_set_ptt_inverted(true); // Required for DR3100
    vw_set_rx_pin(12);
    vw_setup(4000);  // Bits per sec
    pinMode(13, OUTPUT);
   
    vw_rx_start();       // Start the receiver PLL running
    
    for (int i = 0; i < 3; i++) 
   {
          pinMode(motorPin[i], OUTPUT);
          pinMode(in1, OUTPUT);
          pinMode(in2,OUTPUT);
   }}
    void loop(){
 
 
 // this is the recieving code. this controls how many int you can send.
 uint8_t buf[VW_MAX_MESSAGE_LEN];
    uint8_t buflen = VW_MAX_MESSAGE_LEN;

    if (vw_get_message(buf, &buflen)) // Non-blocking
    { 
     int i;

        digitalWrite(13, true); // Flash a light to show received good message
  // Message with a good checksum received, dump it.
  for (i = 0; i < buflen; i++)
  {
   
      
if(buf[0]=='2')//when the number 2 is recieved it will turn motor1 on and it should go forward.
      {
        forward();//go forward
        Serial.println(" = forward");
      }
    
if(buf[i] == '1')//when the number 1 is recieved it will turn motor1 on and it should go backward.
      {
        backward();//go backward
        Serial.println(" = backward");
      }
       
if(buf[i] == '4')//when the number 4 is recieved it will turn motor2 on and it should go left.
      {
        left();//go left
        Serial.println(" = left");
      }

if(buf[i] == '3')//when the number 3 is recieved it will turn motor2 on and it should go right.
      {
        right();//go right
        Serial.println(" = right");
      }

if(buf[i] == '5')//when the number 5 is recieved it should turn everything off
       {
         stopMotor();//stop/brake
         Serial.println(" = stopped");
       }

if(buf[i] == 'b')//when the letter b is recieved it will turn motor1 off
       {
         stopforward();//stop/brake
         }
        

if(buf[i] == 'a')//when the letter a is recieved it will turn motor1 off
       {
         stopbackward();//stop/brake
         }

if(buf[i] == 'd')//when the letter d is recieved it will turn motor2 off
       {
         stopleft();//stop/brake
        }

if(buf[i] == 'c')//when the letter c is recieved it will turn motor2 off
       {
         stopright();//stop/brake
         }

          
if(buf[i] == '8') //when the number 8 is recieved it will turn on the sirens
      {Sirens();
     Serial.println(" = SIRENS"); }
      
if(buf[i] == 'f')
      {stopSirens();}//when the letter F is recieved it will turn off the sirens

  }
  
        digitalWrite(13, false);



} }

//from here we define which outputs will be high or low.
void forward()
{
  digitalWrite(en1,HIGH);
  digitalWrite(en2,HIGH);
  digitalWrite(in1,HIGH);
  digitalWrite(in2, LOW);
  }
 void stopforward()
  {
  digitalWrite(en1,HIGH);
  digitalWrite(en2,HIGH);
  digitalWrite(in1,LOW);

  }
  
void backward()
{
  digitalWrite(en1,HIGH);
  digitalWrite(en2,HIGH);
  digitalWrite(in1,LOW);
  digitalWrite(in2,HIGH);

}
void stopbackward()
{
  digitalWrite(en1,HIGH);
  digitalWrite(en2,HIGH);
  digitalWrite(in2,LOW);
 
  }
void left()
{
  digitalWrite(en1,HIGH);
  digitalWrite(en2,HIGH);
  digitalWrite(in3,LOW);
  digitalWrite(in4,HIGH);
  
  
}
void stopleft()
{
  digitalWrite(en1,HIGH);
  digitalWrite(en2,HIGH);
  digitalWrite(in4,LOW);
  
  
}

void right()
{
  digitalWrite(en1,HIGH);
  digitalWrite(en2,HIGH);
  digitalWrite(in3,HIGH);
  digitalWrite(in4,LOW);
  
  
}
void stopright()
{
  digitalWrite(en1,HIGH);
  digitalWrite(en2,HIGH);
  digitalWrite(in3,LOW);

  
  
}
void stopMotor()
{
  digitalWrite(en1,HIGH);
  digitalWrite(en2,HIGH);
  digitalWrite(in1,LOW);
  digitalWrite(in2,LOW);
  digitalWrite(in3,LOW);
  digitalWrite(in4,LOW);
  
}
void Sirens(){
digitalWrite(light1,HIGH);
digitalWrite(light2,LOW);
delay(100);
digitalWrite(light1,LOW);
digitalWrite(light2,HIGH);
delay(100); }

void stopSirens(){
  digitalWrite(light1,LOW);
  digitalWrite(light2,LOW);
}
 //End Of Code