HVAC_ACTUAL_FAN_SPEED_RPM

What it is

How the ID is built

A property ID is a 32-bit value packing four fields. Reading 0x1540050f apart:

Reading it from an app

CarPropertyManager mgr = (CarPropertyManager)
        car.getCarManager(Car.PROPERTY_SERVICE);

int value =
        mgr.getIntProperty(VehiclePropertyIds.HVAC_ACTUAL_FAN_SPEED_RPM, areaId);

This property is read-only — writes are rejected. It fires a callback whenever the value changes.