DallasTemperature Library

Library for Maxim Temperature Integrated Circuits. This library supports the following devices :
  • DS18B20
  • DS18S20 - Please note there appears to be an issue with this series.
  • DS1822
  • DS1820
  • MAX31820
You will need a pull-up resistor of about 5 KOhm between the 1-Wire data line and your 5V power. If you are using the DS18B20, ground pins 1 and 3. The centre pin is the data line '1-wire'. In case of temperature conversion problems (result is -85), strong pull-up setup may be necessary. See section Powering the DS18B20 in DS18B20 datasheet (page 7) and use DallasTemperature(OneWire*, uint8_t) constructor. We have included a "REQUIRESNEW" and "REQUIRESALARMS" definition. If you want to slim down the code feel free to use either of these by including
at the top of DallasTemperature.h
Finally, please include ZUNO_OneWire.h before you begin. The library can work with any pin it works with Zuno OneWire see Zuno OneWire about this and the peripherals used.
// Include the libraries we need
#include "ZUNO_OneWire.h"
#include "DallasTemperature.h"

#define MY_SERIAL		Serial
#define ONE_WIRE_BUS	9

// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature. 
DallasTemperature sensors(&oneWire);

// arrays to hold device address
DeviceAddress insideThermometer;

 * Setup function. Here we do the basics
void setup(void) {
	// start serial port
	MY_SERIAL.println("Dallas Temperature IC Control Library Demo");

	// locate devices on the bus
	MY_SERIAL.print("Locating devices...");
	MY_SERIAL.print("Found ");
	MY_SERIAL.print(sensors.getDeviceCount(), DEC);
	MY_SERIAL.println(" devices.");

	// report parasite power requirements
	MY_SERIAL.print("Parasite power is: "); 
	if (sensors.isParasitePowerMode()) MY_SERIAL.println("ON");
	else MY_SERIAL.println("OFF");
	// Assign address manually. The addresses below will beed to be changed
	// to valid device addresses on your bus. Device address can be retrieved
	// by using either oneWire.search(deviceAddress) or individually via
	// sensors.getAddress(deviceAddress, index)
	// Note that you will need to use your specific address here
	//insideThermometer = { 0x28, 0x1D, 0x39, 0x31, 0x2, 0x0, 0x0, 0xF0 };

	// Method 1:
	// Search for devices on the bus and assign based on an index. Ideally,
	// you would do this to initially discover addresses on the bus and then 
	// use those addresses and manually assign them (see above) once you know 
	// the devices on your bus (and assuming they don't change).
	if (!sensors.getAddress(insideThermometer, 0)) MY_SERIAL.println("Unable to find address for Device 0"); 
	// method 2: search()
	// search() looks for the next device. Returns 1 if a new address has been
	// returned. A zero might mean that the bus is shorted, there are no devices, 
	// or you have already retrieved all of them. It might be a good idea to 
	// check the CRC to make sure you didn't get garbage. The order is 
	// deterministic. You will always get the same devices in the same order
	// Must be called before search()
	// assigns the first address found to insideThermometer
	//if (!oneWire.search(insideThermometer)) MY_SERIAL.println("Unable to find address for insideThermometer");

	// show the addresses we found on the bus
	MY_SERIAL.print("Device 0 Address: ");

	// set the resolution to 9 bit (Each Dallas/Maxim device is capable of several different resolutions)
	sensors.setResolution(insideThermometer, 9);
	MY_SERIAL.print("Device 0 Resolution: ");
	MY_SERIAL.print(sensors.getResolution(insideThermometer), DEC); 

// function to print the temperature for a device
void printTemperature(DeviceAddress deviceAddress) {
	// method 1 - slower
	//MY_SERIAL.print("Temp C: ");
	//MY_SERIAL.print(" Temp F: ");
	//MY_SERIAL.print(sensors.getTempF(deviceAddress)); // Makes a second call to getTempC and then converts to Fahrenheit

	// method 2 - faster
	float tempC = sensors.getTempC(deviceAddress);
		MY_SERIAL.println("Error: Could not read temperature data");
	MY_SERIAL.print("Temp C: ");
	MY_SERIAL.print(" Temp F: ");
	MY_SERIAL.println(DallasTemperature::toFahrenheit(tempC)); // Converts tempC to Fahrenheit
 * Main function. It will request the tempC from the sensors and display on MY_SERIAL.
void loop(void) {
	// call sensors.requestTemperatures() to issue a global temperature 
	// request to all devices on the bus
	MY_SERIAL.print("Requesting temperatures...");
	sensors.requestTemperatures(); // Send the command to get temperatures
	// It responds almost immediately. Let's print out the data
	printTemperature(insideThermometer); // Use a simple function to print out the data

// function to print a device address
void printAddress(DeviceAddress deviceAddress) {
	for (uint8_t i = 0; i < 8; i++) {
		if (deviceAddress[i] < 16) MY_SERIAL.print("0");
		MY_SERIAL.print(deviceAddress[i], HEX);