#include <AccelStepper.h>

#define Enable (1)          // Enable motor control
#define Pin_step_B1 (2)    // Pin steping back left motor
#define Pin_dir_B1 (3) 

#define FORWARD_MODE        (2)
#define BACKWARD_MODE       (7)

AccelStepper FL(Enable,Pin_step_B1, Pin_dir_B1); // pin 3 = step, pin 6 = direction

 int  Incoming_value = 0 ;
 
void setup() 
{
  Serial.begin(9600);
  
  FL.setMaxSpeed(2000);
  
 
}

void loop()
{ 
    if (Serial.available()> 0)
   {
    Incoming_value = Serial.read();      
    Serial.print(Incoming_value);        
    Serial.print("\n");        
  if(Incoming_value == '1')
    {
      FORWARD_MODE();  
    }      
  if(Incoming_value == '0')
    {
      BACKWARD_MODE();        
    }  
 }


  void FORWARD_MODE() // กด 2   เดินหน้า
   {                  
    FL.setSpeed(100);
    FL.runSpeed();
   }
   
  void BACKWARD_MODE() // กด 7 ถอยหลัง
   {                   
    FL.setSpeed(-100);
    FL.runSpeed();
   }
    /*val = Serial.read();
    Serial.println(val);*/