External conditions

ENV_OUTSIDE_TEMPERATURE

What it is

Outside temperature

This property must communicate the temperature reading of the environment outside the vehicle. If there are multiple sensors for measuring the outside temperature, this property should be populated with the mean or a meaningful weighted average of the readings that will best represent the temperature of the outside environment.

How the ID is built

A property ID is a 32-bit value packing four fields. Reading 0x11600703 apart:

Field	Mask	Value	Means
Group	0xf0000000	0x10000000	SYSTEM
Area	0x0f000000	0x01000000	GLOBAL
Type	0x00ff0000	0x00600000	FLOAT
Ordinal	0x0000ffff	0x00000703	0x703

Reading it from an app

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

mgr.registerCallback(callback,
        VehiclePropertyIds.ENV_OUTSIDE_TEMPERATURE,
        CarPropertyManager.SENSOR_RATE_ONCHANGE);

This property is read-only — writes are rejected. It changes continuously, so subscribe at a sample rate rather than polling.