Default behavior regarding time

The WVA has a real-time clock. This clock must be set using the web services interface resource hw/time by the connected device (phone, tablet, PC). See the description of the hw/time resource in the Wireless Vehicle Bus Application Developer's Guide.

For information about accessing the web services interface, see Access and navigate the web services section in the Wireless Vehicle Bus Application Developer's Guide.

When disconnected from a power source, either in a desktop environment or a vehicle's diagnostic port, the real time clock keeps its time for two hours. After that point, the time is lost and the real time clock must be reset.

As long as the WVA is installed in the vehicle, you can assume the WVA clock is accurate. Once the WVA is disconnected from the vehicle and not powered by any other source, some drift in the time can occur.

Note that in any application code developed for the WVA, the system time must be set by the hw/time resource before any firmware update operations.