Code Arduino Control Valve

 /*kodingan arduino control valve manual.
 kodingan ini berjalan saat dicoba langsung dengan valve
 namun saat saya gabungkan codingan control valve dengan temperature , data pengambilan temperatur tidak terbaca /teraquisisi saat sedang 
 mengontrol valvenya. Saya masih mencari dan memperbaiki untuk kodingannya */

 #include "Stepper.h"
 #define STEPS  32   // Number of steps for one revolution of Internal shaft
                   // 2048 steps for one revolution of External shaft

 volatile boolean TurnDetected;  // need volatile for Interrupts 
 volatile boolean rotationdirection;  // CW or CCW rotation

 const int PinCLK=2;   // Generating interrupts using CLK signal
 const int PinDT=3;    // Reading DT signal
 const int PinSW=4;    // Reading Push Button switch

 int RotaryPosition=0;    // To store Stepper Motor Position

 int PrevPosition;     // Previous Rotary position Value to check accuracy
 int StepsToTake;      // How much to move Stepper

 // Setup of proper sequencing for Motor Driver Pins
 // In1, In2, In3, In4 in the sequence 1-3-2-4
 Stepper small_stepper(STEPS, 8, 10, 9, 11);

 // Interrupt routine runs if CLK goes from HIGH to LOW
 void isr ()  {
   delay(5);  // delay for Debouncing
   if (digitalRead(PinCLK))
     rotationdirection= digitalRead(PinDT);
   else
     rotationdirection= !digitalRead(PinDT);
   TurnDetected = true;
 }

 void setup ()  {
 
 pinMode(PinCLK,INPUT);
 pinMode(PinDT,INPUT);  
 pinMode(PinSW,INPUT);
 digitalWrite(PinSW, HIGH); // Pull-Up resistor for switch
 attachInterrupt (0,isr,FALLING); // interrupt 0 always connected to pin 2 on Arduino UNO
 }

 void loop ()  {
   small_stepper.setSpeed(800); //Max seems to be 700
   if (!(digitalRead(PinSW))) {   // check if button is pressed
     if (RotaryPosition == 0) {  // check if button was already pressed
     } else {
         small_stepper.step((RotaryPosition*100));
         RotaryPosition=0; // Reset position to ZERO
       }
     }

   // Runs if rotation was detected
   if (TurnDetected)  {
     PrevPosition = RotaryPosition; // Save previous position in variable
     if (rotationdirection) {
       RotaryPosition=RotaryPosition-1;} // decrase Position by 1
     else {
       RotaryPosition=RotaryPosition+1;} // increase Position by 1

     TurnDetected = false;  // do NOT repeat IF loop until new rotation detected

     // Which direction to move Stepper motor
     if ((PrevPosition + 1) == RotaryPosition) { // Move motor CW
       StepsToTake=-100; 
       small_stepper.step(StepsToTake);
     }

     if ((RotaryPosition + 1) == PrevPosition) { // Move motor CCW
       StepsToTake=100;
       small_stepper.step(StepsToTake);
     }
   }
 }