#include <SPI.h>

#define LED 7
#define ipbutton 2
int buttonvalue;
int x;

void setup() {
  Serial.begin(115200);

  pinMode(ipbutton, INPUT);
  pinMode(LED, OUTPUT);

  SPI.begin();
  SPI.setClockDivider(SPI_CLOCK_DIV8);

  digitalWrite(SS, HIGH);
}

void loop() {
  byte Mastersend, Masterreceive;

  buttonvalue = digitalRead(ipbutton);

  if (buttonvalue == HIGH)
  {
    x = 1;
  } 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, LOW);
    Serial.println("Master LED Off");
  }
  delay(1000);
}