// 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;
byte sensorValue = 0;
byte thresholdInc = 15;
byte thresholdBase = 124;
byte thresholds[] = { thresholdBase+0*thresholdInc,
                      thresholdBase+1*thresholdInc,
                      thresholdBase+2*thresholdInc,
                      thresholdBase+3*thresholdInc,
                      thresholdBase+4*thresholdInc,
                      thresholdBase+5*thresholdInc,
                      thresholdBase+6*thresholdInc};

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);
  pinMode (2, OUTPUT);
  pinMode (3, OUTPUT);
  pinMode (4, OUTPUT);
  pinMode (5, OUTPUT);
  pinMode (6, OUTPUT);
  pinMode (7, OUTPUT);
}

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()){
    sensorValue = Wire.read();
  }
  if (sensorValue > thresholds[0] && sensorValue <= thresholds[1]){
      digitalWrite (2, HIGH);
      digitalWrite (3, LOW);
      digitalWrite (4, LOW);
      digitalWrite (5, LOW);
      digitalWrite (6, LOW);
      digitalWrite (7, LOW);
  }
  if (sensorValue > thresholds[1] && sensorValue <= thresholds[2]){
      digitalWrite (2, HIGH);
      digitalWrite (3, HIGH);
      digitalWrite (4, LOW);
      digitalWrite (5, LOW);
      digitalWrite (6, LOW);
      digitalWrite (7, LOW);
  }
  if (sensorValue > thresholds[2] && sensorValue <= thresholds[3]){
      digitalWrite (2, HIGH);
      digitalWrite (3, HIGH);
      digitalWrite (4, HIGH);
      digitalWrite (5, LOW);
      digitalWrite (6, LOW);
      digitalWrite (7, LOW);
  }
  if (sensorValue > thresholds[3] && sensorValue <= thresholds[4]){
      digitalWrite (2, HIGH);
      digitalWrite (3, HIGH);
      digitalWrite (4, HIGH);
      digitalWrite (5, HIGH);
      digitalWrite (6, LOW);
      digitalWrite (7, LOW);
  }
  if (sensorValue > thresholds[4] && sensorValue <= thresholds[5]){
      digitalWrite (2, HIGH);
      digitalWrite (3, HIGH);
      digitalWrite (4, HIGH);
      digitalWrite (5, HIGH);
      digitalWrite (6, HIGH);
      digitalWrite (7, LOW);
  }
  if (sensorValue > thresholds[5] && sensorValue <= thresholds[6]){
      digitalWrite (2, HIGH);
      digitalWrite (3, HIGH);
      digitalWrite (4, HIGH);
      digitalWrite (5, HIGH);
      digitalWrite (6, HIGH);
      digitalWrite (7, HIGH);
  }
}