Behaviour upon receiving empty eventData

[01ste02]

Checklist

• I have read and followed the above instructions

• I have checked the troubleshooting section and my problem is not described there.

• I have read the changelog and my problem was not mentioned there or the fix did not work.

Describe the issue

What is happening?
When receiving the following event:

12/28/2024, 9:31:05 PM - notification
Arg 0:
111
Arg 1:
└─eventType: 3
└─dataType: 0
└─eventData
└─eventTypeLabel: Disarm all
└─dataTypeLabel: None

We get an empty payload, even though the dataType is set to 0. Is this allowed? This is then interpreted as 0x00 when stringifying the JSON data, resulting in the following parsing:

2024-12-28T19:33:15.859Z DRIVER « [Node 003] [REQ] [ApplicationCommand]
                                  └─[Security2CCMessageEncapsulation]
                                    │ sequence number: 242
                                    │ security class:  S2_AccessControl
                                    └─[EntryControlCCNotification]
                                        sequence number: 5
                                        data type:       0
                                        event type:      3
                                        event data:      0x00

Is this expected behavior on your part, or is it undefined/unexpected?

Anything else we should know?

This is also discussed here:
home-assistant/core#134172

With more in-depth analysis in home-assistant/core#134172 (comment)

Software versions

Driver (node-zwave-js): 14.3.7

Z-Wave JS UI: 9.27.8

Home Assistant Z-Wave Integration: 1.40.2

Z-Wave Controller (Stick/Dongle/...)

AEON Labs Z stick Gen5 USB Controller v1.1

Device information

Manufacturer: Philio Tech
Model name: PSK01
Node ID: 3

Checklist

• I made sure to provide a driver log on level debug.

• The log includes a re-interview of the problematic device (if applicable).

• The log includes the problematic interaction with the device (if applicable).

• I provided the node ID of the problematic device (if applicable).

Upload Logfile

home-assistant_zwave_js_2024-12-28T19-33-19.766Z.log

[zwave-js-bot]

👋 Hey @01ste02!

It looks like you attached a logfile, but its filename doesn't look like it a driver log that came from Z-Wave JS.

Please double-check that you uploaded the correct logfile. If you did, disregard this comment.

As a reminder, here's how to create one:

• Z-Wave JS UI
• Home Assistant Z-Wave Integration
• ioBroker.zwave2 Adapter

[01ste02]

Updated the logfile to the correct one

[kpine]

We get an empty payload, even though the dataType is set to 0. Is this allowed? This is then interpreted as 0x00 when stringifying the JSON data, resulting in the following parsing

To clarify (as I suggested submitting the issue), there is not an empty payload, as that is what one would actually expect with the NA data type. The event data contains a single byte set to 0 (e.g. "\0"). The question is whether Z-Wave JS should omit the event data when the type is NA, as the specs would indicate that is not valid, or if you just want to pass the data as-is.