On the Arduino Mega, SDA is digital pin 20 and SCL is 21.

On most Arduino boards, SDA (data line) is on analog input pin 4, and SCL (clock line) is on analog input pin 5. The temperature value is stored in two bytes of data, so you need to combine these bytes to get the temperature value in degrees Celsius. Wire Library This library allows you to communicate with I2C / TWI devices. To do this, you call the `reset()` method on the OneWire object, followed by the `select()` method and the unique address of the DS18B20 sensor, and then send a command to read the scratchpad memory. Read the temperature data from the DS18B20 sensor by sending a command to read the (poe://and extracting the temperature value from the returned data. Wait for the temperature conversion to complete by calling the `delay()` function for the required (poe://The DS18B20 sensor takes 750ms to convert the temperature, so you can use the `delay()` function to wait for that amount of time.ħ. Read also: RESEARCH PAPER WRITING SOFTWARE FREE DOWNLOADĦ.

One wire library for arduino download