Problem with the speed of a stepper motor

hello making project allow me turn on , off light , change speed of stepper motor via bluetooth. can turn light on , off cannot operate stepper.
the motor have 3 fixed speeds sort of table fan.
the speeds this
if send 2 through bluetooth terminal stepper off  
if send 3 stepper run slowly
if send 4 run faster.

i using arduino uno

this stepper motor , driver:
http://www.ebay.co.uk/itm/dc-5v-stepper-step-motor-driver-test-module-board-uln2003-5-line-4-phase-arduino-/310643134044?pt=uk_boi_electrical_components_supplies_et&hash=item4853c60e5c

and here code:

code: [select]

#include <accelstepper.h>


accelstepper stepper; // defaults accelstepper::full4wire (4 pins) on 2, 3, 4, 5

char inbyte;          //declare variable bluetooth com


const int ledpin = 13;   // led connected pin 13
const int arraypin = 7;  // array pin 7

void setup()
{
 serial.begin(9600); // bletooth baud rate
 
 pinmode(ledpin, output); // led pin output
 pinmode(arraypin, output); // array output
 
 stepper.setmaxspeed(1000);
 stepper.setspeed(500);
 stepper.runspeed();
}

void loop()
{
 digitalwrite(ledpin, high);
    while (!serial.available()); // wait input
    inbyte = serial.read();      // read next available byte
   
    stepper.runspeed();
   
    if( inbyte == '0' ) digitalwrite(arraypin, high);  // if it's 0 (zero) tun led off
    if( inbyte == '1' ) digitalwrite(arraypin, low); // if it's 1 (one) turn led on
   
    if( inbyte == '2' )
    {
      stepper.setmaxspeed(1000);
      stepper.setspeed(0);
      stepper.runspeed();
    }
   
    if( inbyte == '3' )
    {
      stepper.setmaxspeed(1000);
      stepper.setspeed(200);
      stepper.runspeed();
    }
   
    if( inbyte == '4' )
    {
      stepper.setmaxspeed(1000);
      stepper.setspeed(500);
      stepper.runspeed();
    }
   
   
    stepper.runspeed();
    delay(50);
 }

thank in advance , apologize english

how powering stepper motor? schematic diagram of wiring help.

Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > Problem with the speed of a stepper motor

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