I bought the Waterproof DS18B20 Digital temperature sensor and the wire colors are red, yellow, and blue. I have the red as 5V, yellow to ground, and blue as my data. Using the serial monitor it displays -127. I tried changing the yellow and blue wires around. Still reads the same. Reads the same with the probe disconnected too. Im not sure what the wire color coding is and Im not sure how to get this to communicate with the probe. Can any one please help?