/* 
 *  Bluetooh Basic: Stepper Control
 *  Coder - Mayoogh Girish for LED
 *  Modified by Yasir Shafiullah for Stepper
 *  Website - http://bit.do/Avishkar
 *  Download the App : 
 *  This program lets you to control a LED on pin 13 of arduino using a bluetooth module
 */

 #include <SoftwareSerial.h>
#define txPin 4     // PA0(MISO) transmit signal to the bridge
#define rxPin 5     // PA1(SCK) recieves signal from bridge 

SoftwareSerial mySerial(rxPin,txPin);

const int stepPin = 3; 
const int dirPin = 2;

char Incoming_value = 0;                //Variable for storing Incoming_value
void setup() 
{
  mySerial.begin(9600);         //Sets the data rate in bits per second (baud) for serial data transmission
  pinMode(txPin, INPUT);   //default tx as input
  pinMode(stepPin,OUTPUT); 
  pinMode(dirPin,OUTPUT);
  
}
void loop()
{
  if(mySerial.available() > 0)  
  {
    Incoming_value = mySerial.read();      //Read the incoming data and store it into variable Incoming_value
    mySerial.print(Incoming_value);        //Print Value of Incoming_value in Serial monitor
    mySerial.print("\n");        //New line 
    if(Incoming_value == '2')            //Checks whether value of Incoming_value is equal to 2 
    {  
      digitalWrite(dirPin,LOW); // Enables the motor to move in a particular direction
  // Makes 200 pulses for making one full cycle rotation
  for(int x = 0; x < 1000; x++) {
    digitalWrite(stepPin,HIGH); 
    
    delay(1);  // ms
    digitalWrite(stepPin,LOW); 
    
    delay(1); 

    if(Incoming_value == 'B')       //Checks whether value of Incoming_value is equal to B
     { digitalWrite(dirPin,LOW);   //If value is B then set dir low and Step low
       digitalWrite(stepPin,LOW); 
     }

     else if(Incoming_value == 'I')       //Checks whether value of Incoming_value is equal to 0
     { digitalWrite(dirPin,LOW);    //If value is I then set dir low and Step low
       digitalWrite(stepPin,LOW); 

     }
 
  }
    }
    
           else if(Incoming_value == '9')            //Checks whether value of Incoming_value is equal to 1 
    {  
      digitalWrite(dirPin,LOW); // Enables the motor to move in a particular direction
  // Makes 200 pulses for making one full cycle rotation
  for(int x = 0; x < 1000; x++) {
    digitalWrite(stepPin,HIGH); 
    
    delay(1);  // ms
    digitalWrite(stepPin,LOW); 
    
    delay(1); 

  if(Incoming_value == 'I')       //Checks whether value of Incoming_value is equal to 0
     { digitalWrite(dirPin,LOW);    //If value is I then set dir low and Step low
       digitalWrite(stepPin,LOW); 

     }
 
  }
    }
    
  }                            
 
}