#include <OneWire.h>


OneWire ds(10);  // on pin 10


void setup(void) {  
  Serial.begin(9600);
                 }


void loop(void) {
  byte i;
  byte present = 0;
  byte data[12];
  byte addr[8];
  float celsius;

  

//searching if the ibutton is connected
  ds.reset_search();
  if ( !ds.search(addr)) {
      Serial.print("No more addresses.\n");
      ds.reset_search();
      return;
                         }

                          
//checking crc
  if ( OneWire::crc8( addr, 7) != addr[7]) {
      Serial.print("CRC is not valid!\n");
      return;                                        
                                            }                                
                                           
//taking readings
//first stage is to convert the data by selecting the reg 33 

          ds.reset();
          ds.select(addr);
          ds.write(0x44,1);  // start conversion, with parasite power on at the end
          //giving enough time for the conversion 
          delay(1000);  
          
//second stage is to read from scratchpad of the address 0f    
         ds.reset();
         ds.select(addr);    
         ds.write(0xAA);        // Read Scratchpad
         
         
         
//fitching and printing data
    Serial.print("d = ");
    for ( i = 0; i < 9; i++) {           // we need 9 bytes
    data[i] = ds.read();
    Serial.print(data[i],HEX);
    Serial.print(" ");}


Serial.print('\n');

 celsius = (((float)data[1] / 2.0f) - 41.0f) + ((float)data[0] / 512.0f);
  Serial.print("16 bit Celu= ");
  Serial.print(celsius);
 

                         
  Serial.print(" CRC=");
  Serial.print( OneWire::crc8( data,7), HEX);
  Serial.println();}