Behaviour for handling incoming commands during the firmware update process

When you initialize a firmware update process you can pass the :handler option to the function which can either be the a pid (defaults to caller pid) or a module that implements this behaviour.

The report this callback function will most want to handle is:

• Grizzly.ZWave.Commands.FirmwareUpdateMDRequestReport It indicates whether the formware update was initiated successfully.
• Grizzly.ZWave.Commands.FirmwareUpdateMDStatusReport It is sent by the target device once the firmware update completes, successfully or in failure.

The callback might also want to be aware of:

• Grizzly.ZWave.Commands.FirmwareUpdateMDGet It is sent by the target device when it wants more firmware image fragments
• Grizzly.ZWave.Commands.FirmwareMDReport It might be sent by the target device during the upgrade to modify the maximum fragment size.
• Grizzly.ZWave.Commands.FirmwareUpdateActivationReport It is sent by the target device in response to an activation request and gives the activation status.