Lights

READING_LIGHTS_SWITCH

What it is

Reading lights switch

The position of the physical switch which controls the reading lights. This might be different than the READING_LIGHTS_STATE if the lights are on because a door is open or because of a voice command. For example, while the switch is in the "off" or "automatic" position.

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 0x15400f04 apart:

Field	Mask	Value	Means
Group	0xf0000000	0x10000000	SYSTEM
Area	0x0f000000	0x05000000	SEAT
Type	0x00ff0000	0x00400000	INT32
Ordinal	0x0000ffff	0x00000f04	0xf04

Reading it from an app

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

int value =
        mgr.getIntProperty(VehiclePropertyIds.READING_LIGHTS_SWITCH, 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.