Help With Fibaro FGK-101 and Dallas 18B20 Temp Sensor

I am trying to setup the Fibaro FGK-104 with a Dallas 18B20 Temp Sensor, but just can’t seem to get any temperature readings from the device.

I have tried using JJ’s Fibaro FGK-101 Handler and it shows battery / contact status but nothing for the temp.

Anyone have any ideas what I could be doing wrong ?