How do you control a Nexia thermostat with a SmartThings hub

I have followed the instructions above to the letter and I am still unable to get Smartthings to talk to my Nexia 1050 thermostat. I get no temp display and the only control that somewhat works is the thermostat mode switch. I have great success installing quite a few smart apps and device handlers, but this one is killing me. Any ideas would be appreciated.