I have uploaded the folling Sketch successfully.
/* Arduino DS18B20 temp sensor tutorial
More info: http://www.ardumotive.com/how-to-use-the-ds18b20-temperature-sensor-en.html
Date: 19/6/2015 // www.ardumotive.com */
// Data wire is plugged into pin 2 on the Arduino
#define ONE_WIRE_BUS 2
// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
// Pass our oneWire reference to Dallas Temperature.
Serial.begin(9600); //Begin serial communication
Serial.println(“Arduino Digital Temperature // Serial Monitor Version”); //Print a message
// Send the command to get temperatures
Serial.print("Temperature is: ");
Serial.println(sensors.getTempCByIndex(0)); // Why “byIndex”? You can have more than one IC on the same bus. 0 refers to the first IC on the wire
//Update value every 1 sec.
I can see that the FTDI232 shows serial activity but the activity light on the Pro Mini is not flashing.
The Pro mini is one of the blue variety.