While Home Depot no longer carries these thermostats they are still manufactured and still available from the RadioThermostat Homepage
The only difference between their documented settings that are necessary for this to be used in XTension is that you must give it a static IP address on your network. You can do this either directly from it’s own configuration or use it’s MAC address and your wifi router to reserve a specific DHCP address for it. Without a static address XTension cannot reliably connect to it.
To setup with XTension you need to create an interface to it. In the preferences create a new interface and select “Radio Thermostat” from the port popup select “remote IP address” and enter the static IP address of the stat and the number 80 for the port.
save that configuration and then create some new units to accept the data.
When you first connect and every hour the click on the thermostat will be set to the time on the computer.
There are some interesting features of the firmware that are not show stoppers but that you need to be aware of. Only the setpoint, heat or cool, that is active based on the mode is reported by the thermostat. Meaning that if you have the mode turned to 0/off the values in the computer are not updated. In heat mode only the heat setpoint is sent and in AC only the cool setpoint is sent. If you change one of the setpoints the mode of the stat is automatically changed to heat or ac depending on which you set.
Make sure you’ve read the General Thermostat Notes
Version 9.1 adds support for many more units as are supported in the newer versions of this thermostat. Not all thermostat models support these new units or capabilities.
The wifi thermostat will also now respond to the Initialize Controller verb sending it the command to reboot. If the wifi is still operating but the thermostat otherwise misbehaving you may be able to recover control by issuing this command. Not all thermostats support this command. My CT-30 models return a success message from the reboot command, but do not actually do anything.