I think there is. On the Ecobee, it will list the primary T-Stat as a sensor and then you tag which modes you would like to participate in. you can select none. By doing this, the T-Stat only acts as a controller for your HVAC, but the Temp needs are provided by the selected or multiple selected Sensor Devices.
I believe this is one which best fits what I am saying. Although, I would like it to be primary all the time.