Page 133 - Programming the Photon Getting Started With the Internet of Things

Figure 6.11 Breadboard layout diagram.

The resistor is used as a pull-down resistor to make sure there is no ghost reading from
the sensor and gives us a more accurate reading.

Let’s take a look at the program code that we will be using to read the temperature
sensor:

#include "OneWire/OneWire.h"

#include "spark-dallas-temperature/spark-dallas-temperature.h"

double tempC = 0.0;
double tempF = 0.0;

int tempSensorPin = D0;

OneWire oneWire(tempSensorPin);