002 Read DS18B20 temp. with Arduino language

1. Forewords

Again this is a simple example which come with the library

2. Set the board

Remove the LCD display and make the following wire connection:

Then connect USB cable and write the following sketch in Arduino IDE:

3. The sketch

#include <OneWire.h> #include <DallasTemperature.h> // Data wire is plugged into port 2 on the Arduino #define ONE_WIRE_BUS 2 // Setup a oneWire instance to communicate with any OneWire devices OneWire oneWire(ONE_WIRE_BUS); // Pass our oneWire reference to Dallas Temperature. DallasTemperature sensors(&oneWire); void setup(void) { // start serial port Serial.begin(9600); Serial.println("Dallas Temperature IC Control Library Demo"); // Start up the library sensors.begin(); } void loop(void) { // call sensors.requestTemperatures() to issue a global temperature // request to all devices on the bus //Serial.print("Requesting temperatures..."); sensors.requestTemperatures(); // Send the command to get temperatures //Serial.println("DONE"); //Serial.print("Temperature for the device 1 (index 0) is: "); Serial.println(sensors.getTempCByIndex(0)); }

Then upload the sketch on your board and start the console.

4. Results

Click to zoom