Receiver Code

/*
 * Anschlussbelegung:
 *
 * Arduino        Motor
 * D3              in4
 * D4              in3
 * D5              in2
 * D6              in1
 *
 */

#include <SPI.h>
#include "nRF24L01.h"
#include "RF24.h"
#include <Stepper.h>
int msg[256];
RF24 radio(8,7);
const uint64_t pipe = 0xE8E8F0F0E1LL;
#define STEPS 2048
Stepper stepper(STEPS, 3, 5, 4, 6);
int x = 512;

void setup(void){
 Serial.begin(9600);
 radio.begin();
 radio.openReadingPipe(1,pipe);
 radio.startListening();
 stepper.setSpeed(9);
 }

 void loop(){
  drehen();
 }



void lesen(){
   if (radio.available()){
   bool done = false;
   while (!done){
     done = radio.read(msg, 3);
     x = msg[0];
     }
   }
}


void drehen(){
lesen();
delay(10);
  if (x > 800)
  {
    stepper.step(1);
    }
    else
    {
      lesen();
      }
  if (x < 300)
  {
    stepper.step(-1);
    }
    else
    {
      lesen();
      }
      Serial.println(x);
}