Abstract: In some examples, a device can control an HVAC system within a building. Includes an analog display including a set of markers, and where each marker of the set of markers corresponds to a respective parameter value of a parameter associated with the building; an electric motor; a pointer connected to the electric motor, where the electric motor is configured to rotate the pointer within a pointer range from a lower limit to an upper limit; and processing circuitry. The processing circuitry is configured to: determine a position of the electric motor while the pointer is positioned at one of the lower limit or the upper limit of the pointer range; and calibrate, a position function corresponding to the electric motor.

Abstract: A thermostat assembly includes a thermostat and a trim ring. The thermostat includes a user interface, a thermostat housing having a front portion with a front portion side wall and a back portion with a back portion side wall, the back portion side wall being offset from the front portion side wall, and a controller disposed within the thermostat housing and operably coupled to the user interface, the controller configured to accept input from a user via the user interface and provide one or more control signals to control the HVAC system. The trim ring includes an outer surface that transitions from a larger back side profile to a smaller front side profile. A front side of the trim ring includes a thermostat recess that is configured to receive at least part of the back portion of the thermostat.