How to decode serial data from log.

[spudwebb]

Is there an easy way to decode the serial data that one can see in the log file at debug level, when the node use S0 or S2?

Context: I'm investigating an issue with a lock (Kwikset 910) that is sending a door lock logging report with an "empty" status. Since it is marked as empty zwavejs does not parse any other information from the message sent. I suspect this lock to send a valid report in which only the status is wrong, because the same device was working with another driver. So, I would like to confirm this by manually parsing the message to check what data (timestamp, event type, user code) it contains.

2024-09-12T14:35:21.667Z SERIAL « 0x012f00a8000001004c2198810452043a03a036e03c87addd9941566e85b4ee9e7 (49 bytes)
                                  cfe98cc8ffbb27a074c3100b2007f7fd8
2024-09-12T14:35:21.668Z SERIAL » [ACK]                                                                   (0x06)
2024-09-12T14:35:21.671Z DRIVER « [Node 076] [REQ] [BridgeApplicationCommand]
                                  │ RSSI: -78 dBm
                                  └─[SecurityCCCommandEncapsulation]
                                    │ sequenced: false
                                    └─[DoorLockLoggingCCRecordReport]
                                        record #: 6 (empty)

[AlCalzone]

You can set the NODE_ENV environment variable to development, then additional info including the plaintext is printed. In Z-Wave JS UI, this works by executing the following driver function:

process.env.NODE_ENV = "development"

[AlCalzone]

I double-checked: The LTS version of Node.js you can download from https://nodejs.org/en works and has corepack support.
Start PowerShell as admin, then run corepack enable. Afterwards it automatically downloads yarn for you when you try to run it:

[AlCalzone]

Looks like there was a problem with the build step. The latest commit on master has this fixed.

[spudwebb]

thanks, I can now build and run "Decode message" in VSCode, but I'm not sure to understand how to get the nonce and networkKey.
Is networkKey the S0 key ?
How do I get the nonce?

[AlCalzone]

Network key is the S0 key. Nonce can be found in the log. It should have been sent to the device just before the report you're trying to decode.

[spudwebb]

I finally got it to work, but I had to set 16 bit node IDs in the definition of host in decodeMessage.ts

		get nodeIdType() {
			return NodeIDType.Long;
		},

[AlCalzone]

Showing S0 plaintext in logs is now tracked in #7162