// Include the required Arduino libraries:
#include <OneWire.h>
#include <DallasTemperature.h>
 
// Define to which pin of the Arduino the 1-Wire bus is connected:
#define ONE_WIRE_BUS 2
 
// Create a new instance of the oneWire class to communicate with any OneWire device:
OneWire oneWire(ONE_WIRE_BUS);
 
// Pass oneWire reference to Dallas Temperature library:
DallasTemperature sensors(&oneWire);
 
void setup() {
  // Start serial communication for debugging purposes:
  Serial.begin(9600);
  // Start up the library:
  sensors.begin();
}
 
void loop() {
  // Send command to get temperatures from all devices on bus:
  sensors.requestTemperatures();
  
  // Get number of devices on bus:
  int numberOfDevices = sensors.getDeviceCount();
 
  // Print number of devices on bus:
  Serial.print("Number of devices: ");
  Serial.println(numberOfDevices);
 
  // Loop through each device and print out address and temperature:
 
  for (int i = 0; i < numberOfDevices; i++) {
    // Use a variable to store a found device address
    DeviceAddress tempDeviceAddress;
 
    // Search for devices on bus and assign based on an index. 
    if (sensors.getAddress(tempDeviceAddress, i)) {
      Serial.print("Found '1-Wire' device with address:\n\r");
      printAddress(tempDeviceAddress);
      Serial.print("\n\r");
 
      // Print temperature for found device
      float tempC = sensors.getTempC(tempDeviceAddress);
      Serial.print("Temperature: ");
      Serial.print(tempC);
      Serial.println(" °C");
    }
    else {
      Serial.print("Found ghost device at ");
      Serial.print(i);
      Serial.println(" but could not detect address. Check power and cabling");
    }
    
    delay(1000); 
   }
}
 
// Function that prints a device address
void printAddress(DeviceAddress deviceAddress) {
   for (uint8_t i = 0; i < 8; i++) {
     if (deviceAddress[i] < 16) 
       Serial.print("0");
     Serial.print(deviceAddress[i], HEX);
   }
}