// 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>

byte ledPin = 13;
boolean ledState = 0;

void setup() {
  Wire.begin(10);                // join i2c bus with address #8
  Wire.onReceive(receiveEvent); // register event
  Serial.begin(9600);           // start serial for output
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, ledState);
}

void loop() {
  delay(100);
}

// function that executes whenever data is received from master
// this function is registered as an event, see setup()
void receiveEvent(int howMany) {
  while(Wire.available()){
    Wire.read();
  }
  ledState = !ledState;
  digitalWrite(ledPin, ledState);
  /*while (Wire.available()) { // loop through all but the last
    char c = Wire.read(); // receive byte as a character
    Serial.println(c, DEC);         // print the character
    ledState = !ledState;
    digitalWrite(ledPin, ledState);
    Serial.println(ledState, DEC);         // print the character
  }*/
}