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Vehicle properties
Seats

SEAT_LUMBAR_VERTICAL_POS

What it is

Represents property for seat’s lumbar support vertical position.

The maxInt32Value and minInt32Value in each VehicleAreaConfig must be defined. All integers between minInt32Value and maxInt32Value must be supported.

The maxInt32Value indicates the lumbar support's highest position. The minInt32Value indicates the lumbar support's lowest position.

Values in between minInt32Value and maxInt32Value indicate a transition state between the lowest and highest positions.

This property is not in any particular unit but in a specified range of relative positions.

This property is defined as VehiclePropertyAccess.READ_WRITE, but OEMs have the option to implement it as VehiclePropertyAccess.READ only.

How the ID is built

A property ID is a 32-bit value packing four fields. Reading 0x15400ba1 apart:

FieldMaskValueMeans
Group0xf00000000x10000000SYSTEM
Area0x0f0000000x05000000SEAT
Type0x00ff00000x00400000INT32
Ordinal0x0000ffff0x00000ba10xba1

Reading it from an app

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

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

This property can be read and written, though an OEM may implement it as read-only. It fires a callback whenever the value changes.