#include<SPI.h> 
#define LED 7
#define ipbutton 2
int buttonvalue;

int x;
void setup (void)
{
  Serial.begin(115200); 
  pinMode(ipbutton,INPUT);
  pinMode(LED,OUTPUT);

  SPI.begin();
  SPI.setClockDivider(SPI_CLOCK_DIV8);
  digitalWrite(SS,HIGH);
}

void loop(void)
{
  byte Mastersend,Masterreceive;

  buttonvalue == digitalRead(ipbutton);

  if(buttonvalue == LOW)
  {
    x = 0;
  }
  else
  {
    x = 0;
  }
  digitalWrite(SS, LOW);
  Mastersend = x;
  Masterreceive=SPI.transfer(Mastersend);

  if(Masterreceive == 1)
  {
    digitalWrite(LED, HIGH);
    Serial.println("Master LED ON");
  }
  else
  {
    digitalWrite(LED, HIGH);
    Serial.println("Master LED OFF");
  }
  delay(1000);
}