B08a: Inspect VHAL

Where's the VHAL?

Try to find it with lshal:

adb shell lshal

# Commonly found command isn't working?!
adb shell lshal debug android.hardware.automotive.vehicle@2.0::IVehicle

Small note in the docs: The above command is for HIDL VHAL.

Let's try the AIDL service version:

adb shell \
    dumpsys android.hardware.automotive.vehicle.IVehicle/default
    [--help]
    [--get <PROP_ID>]
    […]

Works!

Using the HAL service

To see all options, use

adb shell dumpsys android.hardware.automotive.vehicle.IVehicle/default --help

Let's check some common property values, like the VIN. The property ID of the VIN can be found in the file: hardware/interfaces/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl

To dump a single property, use

adb shell dumpsys android.hardware.automotive.vehicle.IVehicle/default --get <id>

and replace <id> with the property id.

Is there an easier way to find out property ids?

Also try to set a property. Read the output of --help to find out the argument syntax.

Using the car_service

The car_service offers lots of commands that also can be invoked through dumpsys. You can get a list of commands via:

adb shell dumpsys car_service help

For instance, to get the same VIN information as in the previous step, you could also use:

adb shell dumpsys car_service get-property-value INFO_VIN

To see a full list of outputs use

adb shell dumpsys car_service

Check how you can interact with it using dumpsys!