// custom-chip.  R added by me.      
#include <OneWire.h>
#include <DallasTemperature.h>

OneWire oneWire(A0); //pin A0
DallasTemperature sensor(&oneWire);

void setup(void) {    Serial.begin(9600);    //  delay(2);
  sensor.begin();                            //  delay(20);
}

void loop(void) {
  sensor.requestTemperatures();
  Serial.print("Temperature is: ");
  Serial.println(sensor.getTempCByIndex(0));
  delay(1000);
}
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ds18b20