I Keep getting this error even when the family code is right

[reet66]

I've been following this tutorial so far. and when I run the code, in this module I get this error Traceback (most recent call last): File "<stdin>", line 38, in <module> File "adafruit_ds18x20.py", line 84, in __init__ ValueError: Incorrect family code in device address. This is the thermostat that i'm using. Any help is greatly appreciated. I also have the resistor connected to it.