// Wire Slave Receiver
// by Nicholas Zambetti < http://www.zambetti.com>

// Demonstrates use of the Wire library
// Receives data as an I2C/TWI slave device
// Refer to the "Wire Master Writer" example for use with this

// Created 29 March 2006

// This example code is in the public domain.


#include <Wire.h>

void setup() {
  Wire.begin(8);                // join i2c bus with address #8
  Wire.onReceive(receiveEvent); // register event
  pinMode(13, OUTPUT);
//  Serial.begin(9600);           // start serial for output
}

void loop() {
  delay(500);
}

// function that executes whenever data is received from master
// this function is registered as an event, see setup()
void receiveEvent(int howMany) {
//  while (1 < Wire.available()) { // loop through all but the last
//    char c = Wire.read(); // receive byte as a character
//    Serial.print(c);         // print the character
//  }
//  int x = Wire.read();    // receive byte as an integer
char c = Wire.read();
//  Serial.println(x);         // print the integer
//  Serial.println(x%5);
//  if (x%5 == 0)
if (c == 's')
  {
    digitalWrite(13, HIGH);
  }
  if (c == 'n')
  {
    digitalWrite(13, LOW);
  }

}