Vehicle properties
HVAC & climate
HVAC_FAN_DIRECTION_AVAILABLE
What it is
Fan Positions Available
This is a bit mask of fan positions available for the zone. Each available fan direction is denoted by a separate entry in the vector. A fan direction may have multiple bits from vehicle_hvac_fan_direction set. For instance, a typical car may have the following fan positions: - FAN_DIRECTION_FACE (0x1) - FAN_DIRECTION_FLOOR (0x2) - FAN_DIRECTION_FACE | FAN_DIRECTION_FLOOR (0x3) - FAN_DIRECTION_DEFROST (0x4) - FAN_DIRECTION_FLOOR | FAN_DIRECTION_DEFROST (0x6)
How the ID is built
A property ID is a 32-bit value packing four fields. Reading 0x15410511 apart:
| Field | Mask | Value | Means |
|---|---|---|---|
| Group | 0xf0000000 | 0x10000000 | SYSTEM |
| Area | 0x0f000000 | 0x05000000 | SEAT |
| Type | 0x00ff0000 | 0x00410000 | INT32_VEC |
| Ordinal | 0x0000ffff | 0x00000511 | 0x511 |
Reading it from an app
CarPropertyManager mgr = (CarPropertyManager)
car.getCarManager(Car.PROPERTY_SERVICE);
CarPropertyValue<Integer> value =
mgr.getProperty(VehiclePropertyIds.HVAC_FAN_DIRECTION_AVAILABLE, areaId);This property is read-only — writes are rejected. It is static for the life of the vehicle, so read it once and cache it.