Vehicle properties
Fuel & energy
INSTANTANEOUS_EV_EFFICIENCY
What it is
Instantaneous EV efficiency in km/kWh.
This property must communicate the instantaneous EV battery efficiency of the vehicle in units of km/kWh. The property's value is independent of the DISTANCE_DISPLAY_UNITS and EV_BATTERY_DISPLAY_UNITS properties i.e. this property must always communicate the value in km/kWh.
For the fuel version of this property, see INSTANTANEOUS_FUEL_ECONOMY.
How the ID is built
A property ID is a 32-bit value packing four fields. Reading 0x11600212 apart:
| Field | Mask | Value | Means |
|---|---|---|---|
| Group | 0xf0000000 | 0x10000000 | SYSTEM |
| Area | 0x0f000000 | 0x01000000 | GLOBAL |
| Type | 0x00ff0000 | 0x00600000 | FLOAT |
| Ordinal | 0x0000ffff | 0x00000212 | 0x212 |
Reading it from an app
CarPropertyManager mgr = (CarPropertyManager)
car.getCarManager(Car.PROPERTY_SERVICE);
mgr.registerCallback(callback,
VehiclePropertyIds.INSTANTANEOUS_EV_EFFICIENCY,
CarPropertyManager.SENSOR_RATE_ONCHANGE);This property is read-only — writes are rejected. It changes continuously, so subscribe at a sample rate rather than polling.