//Matt G.
//onion@doorcreekorchard.com
//July 2008


boolean getOneWireTemp(byte *addr, double *retnTemp, OneWire * OW){
  byte present = 0;
  byte data[12];
  int raw;
  double temp;

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

  delay(800);     // maybe 750ms is enough, maybe not
  // we might do a ds.depower() here, but the reset will take care of it.

  present = OW->reset();
  if (present)  //only continue if the sensor is actually there and responding
  {
    OW->select(addr);    
    OW->write(0xBE);         // Read Scratchpad which now contains the temperature data
    for ( int i = 0; i < 9; i++) {           // we need 9 bytes
      data[i] = OW->read();
    }
     if ( OneWire::crc8( data, 8) != data[8]) {
        //Serial.println("CRC is not valid!\n");
        return false;
        }
    raw=(data[1]<<8)+data[0];  //put the two bytes of the temperature (from the response) into a raw int
    temp = (double)raw * 0.0625; //convert to celcius
    *retnTemp=temp*1.8+32;//convert to fahrenheit and set the final return value
    return true;
  }
    return false;
}