[roddyp]

For the Nano V3  I used the nano in the selection list for the TX and it has compiling errors  the WD using the nano selection compiles fine though so the TX board has errors
...

Looks like this is problems caused by the Weatherduino modified Onewire library clashing with what I think is the 'official' one. https://github.com/PaulStoffregen/OneWire

Can the 'official' onewire library now be used rather than the modified one? You'd need to modify the object constructor to this, I think.

Code:

OneWire oneWire(18);