// Wire Master Reader
// by Nicholas Zambetti <http://www.zambetti.com>

// Demonstrates use of the Wire library
// Reads data from an I2C/TWI slave device
// Refer to the "Wire Slave Sender" example for use with this

// Created 29 March 2006

// This example code is in the public domain.


#include <Wire.h>

byte sensorValue = 0;

void setup() {
  Wire.begin();        // join i2c bus (address optional for master)
  Serial.begin(115200);  // start serial for output
}

void loop() {
  /*Wire.requestFrom(10, 6);    // request 6 bytes from slave device #10

  Serial.print("Node@10 answers: ");
  while (Wire.available()) { // slave may send less than requested
    char c = Wire.read(); // receive a byte as character
    Serial.print(c);         // print the character
  }

  delay(500);

  Serial.print("\t");
  Serial.print("\t");
  */
  
  Wire.requestFrom(9, 1);    // request 1 byte from secondary device #9 (My ATtiny44 board)

  Serial.print("Node@09 answers: ");
  while (Wire.available()) { // slave may send less than requested
    sensorValue = Wire.read(); // receive a byte as character
    Serial.print(sensorValue);         // print the character
  }

  delay(50);

  Wire.beginTransmission(10); // transmit to device #10 (Aaron's LED board)
  Wire.write(sensorValue);              // sends one byte
  Wire.endTransmission();    // stop transmitting
  
  Serial.println();

  delay(50);
}