The LibertasDeviceAction. Note Libertas added a LibertasDeviceAction.ReadResponse action.
The response data. It's a union type. The value shall be cast to a type decided by action.
Optional
tag: anyThe arbitary data passed to Libertas_SetOnDevice with the callback instance.
Optional
ref: numberThe reference number of the original request. It is not available if the data is a subscription data report.
The signature of a device callback function.