ConstReadonlyattributes: { ReadonlylocalIndicates the offset the Thermostat server shall make to the measured temperature (locally or remotely) to adjust the Calculated Local Temperature prior to using, displaying or reporting it.
The purpose of this attribute is to adjust the calibration of the Thermostat server per the user’s preferences (e.g., to match if there are multiple servers displaying different values for the same HVAC area) or compensate for variability amongst temperature sensors.
If a Thermostat client attempts to write LocalTemperatureCalibration attribute to an unsupported value (e.g., out of the range supported by the Thermostat server), the Thermostat server shall respond with a status of SUCCESS and set the value of LocalTemperatureCalibration to the upper or lower limit reached.
A ThermostatCluster supports these elements if doesn't support feature LTNE.