// first data to send
byte tSend1[]={0x15, 0x39, 0xF2, 0x78, 0x22, 0x11};
// first data to receive
byte tResp1[]={0x20, 0x1B, 0xF2, 0x79, 0x24, 0x11};
// second data to send
byte tSend2[]={0x25, 0x45, 0xF2, 0x7a, 0x09, 0x11};
// second data to receive
byte tResp2[]={0x30, 0xa0, 0xF2, 0x7b, 0x59, 0x11};

//buffer to put the response in
byte *LastResponse=NULL;

// Initialize everything
void setup()
{
Serial.begin(9600);

// wait a bit
delay(100);

// we will light on when the protocol finnalice ok
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, LOW);
}

// Read the response (in LastResponse
int checkResponse(byte response[],int iResponseSize)
{
int iReceivedCounter=0; // How many byte we have receive
int iReceivedValue=0;
int iIteration=0; // How many iterations we have wait for the last data
int iResult=responseOK;

if(LastResponse!=NULL) //Free memory
free(LastResponse);

LastResponse=(byte *)calloc(iResponseSize,1); //Alloc memory for new data

while(iReceivedCounter
{
if(Serial.available()>0)
{
iIteration=0;
iReceivedValue=Serial.read();
if(iReceivedValue!=response[iReceivedCounter]) // is it the waited byte?
{
iResult=errorProtocol;
break;
}
else
LastResponse[iReceivedCounter++]=(byte)iReceivedValue;
}
else
{
if(iIteration
{
delay(waitForByte); // One more try
iIteration++;
}
else
{
iResult=errorTimeout;
break;
}
}
}
return iResult;
}

void sendData(byte dataToSend[],int iSize)
{
for(int i=0;i
{
Serial.print(dataToSend[i],BYTE);
}
}

void loop()
{
int iImportantValue=0;

void setup(void) {
Serial.begin(57600);
}

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

if ( !ds.search(addr)) {
ds.reset_search();
return;
}

Serial.print("R");
for( i = 0; i < 8; i++) {
Serial.print("-");
if(addr[i]<16)
Serial.print(0);
Serial.print(addr[i], HEX);
}

if ( OneWire::crc8( addr, 7) != addr[7]) {
Serial.print("CRC is not valid!\n");
return;
}

if ( addr[0] != 0x10) {
Serial.print("Device is not a DS18S20 family device.\n");
return;
}

ds.reset();
ds.select(addr);
ds.write(0x44,1); // start conversion, with parasite power on at the end

delay(1000); // maybe 750ms is enough, maybe not
// we might do a ds.depower() here, but the reset will take care of it.

present = ds.reset();
ds.select(addr);
ds.write(0xBE); // Read Scratchpad

for ( i = 0; i < 9; i++) { // we need 9 bytes
data[i] = ds.read();
}
int HighByte=data[0];
int LowByte=data[1];

// Teniendo LowByte y HighByte
int TReading = (HighByte << + LowByte;
int SignBit = TReading & 0x8000; // test most sig bit
if (SignBit) // negative
{
TReading = (TReading ^ 0xffff) + 1; // 2's comp
}
int Tc_100 = (6 * TReading) + TReading / 4; // multiply by (100 * 0.0625) or 6.25

int Whole = Tc_100 / 100; // separate off the whole and fractional portions
int Fract = Tc_100 % 100;

Serial.print(":");
Serial.print(HighByte/2);
Serial.print(".");
Serial.print(LowByte/2);
Serial.print(":");
Serial.print(TReading);