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# CarKey

Access the remote keyless features of configured vehicles in the Wallet app.

## Overview

The CarKey framework offers a way to communicate with vehicles already provisioned
to someone’s Apple Wallet. Car manufacturers adopt this framework in the apps they
use to support and control their vehicles. For example, your app might use it to
lock or unlock the vehicle, or open a power sunroof. To control a vehicle
remotely, you need the following information for that vehicle:

- The function identifiers for each of your vehicle’s features.
- The action identifiers for each action you can perform on a feature.
- The execution status the vehicle can return in response to an action.

The Wallet app maintains a list of vehicles that match your company’s
make, and that the user previously configured for remote access. Create a
session object to get information about those vehicles and to establish a
connection to ones that are in range. Use the session to retrieve the list
of commands available to the current person, and to initiate actions from your app.

> Note: Your app must have the `com.apple.developer.carkey.session` entitlement
> to use this framework. To request the entitlement, you must be an automaker
> enrolled in the MFi Program. For details, see
> <https://developer.apple.com/mfi/>.

## Topics

### Setup

[`CarKeyRemoteControl`](/documentation/CarKey/CarKeyRemoteControl)

The object you use to start a new vehicle-related session.

[`CarKeyRemoteControlSession`](/documentation/CarKey/CarKeyRemoteControlSession)

The object that manages communication with the vehicles
you manufacture.

[`CarKeyRemoteControlSessionDelegate`](/documentation/CarKey/CarKeyRemoteControlSessionDelegate)

An interface you use to receive session- and vehicle-related
information from the system.

[`VehicleReport`](/documentation/CarKey/VehicleReport)

A type that contains information about a vehicle configured for
remote keyless entry in the user’s Apple Wallet.

### Vehicle Actions

[`RemoteKeylessEntryAction`](/documentation/CarKey/RemoteKeylessEntryAction)

An automatically ending action that you want to perform on
a vehicle.

[`RemoteKeylessEntryEnduringAction`](/documentation/CarKey/RemoteKeylessEntryEnduringAction)

An action with an optional stopping point that you want to perform
on a vehicle.

[`FunctionIdentifier`](/documentation/CarKey/FunctionIdentifier)

A type that stores the designation code for one of your
vehicle’s features.

[`ActionIdentifier`](/documentation/CarKey/ActionIdentifier)

A type that stores the designation code for one of
the actions that a vehicle feature supports.

### Error Codes

[`CarKeyErrorCode`](/documentation/CarKey/CarKeyErrorCode)

The errors that can occur when you perform remote-keyless entry operations on a vehicle.


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