I don't know how to tell if my thermostat supports associations. It is talking to my controller as node 6. If I go into the HG module setup page I see the following information:
Manufacturer Specific = 0098:6501:000C
Supported Classes
Basic, 81, 87, Manufacturer Specific, Sensor Multi Level, 40, 42, 44, 45, 43, Version, Configuration, Battery
Basic Value = 255
Battery Level = 87%