Local Control Zigbee Thermostat
Fully support Zigbee thermostat through local control (Hub).
There are two aspects to supporting a zigbee device:
1) There is the ability for the zigbee service to discover and join the device to zigbee network.
2) Then there is the ability for SmartHome to send commands to the device.
We can see that #1 works.
At the moment, the SmartHome ability does not yet support the thermostat cluster which allows it to set temperature setpoints (#2). It does support the report attributes which allows it to read the set point.
It would be beneficial if thermostats (heating, cooling, HVAC and others) worked properly with Alexa through Zigbee local control.