#include <SPI.h> //LIBRARY FOR SPI
#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,Mastereceive;
  buttonvalue = digitalRead(ipbutton);
  if(buttonvalue == HIGH)
  {
    x = 1;
  }
  else
  {
    x = 0;
  }

  digitalWrite(SS, LOW);

  Mastersend = x;
  Mastereceive=SPI.transfer(Mastersend);

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