Device command, invalid arguments?

[olavt]

I have some code that worked before. Not sure when this broke, since I haven't tested it in a while.

This is the message I'm sending and the response I get back:

[17.08.2024 19:31:09.716 INF] MatterServerClient.SendCommandAsync: Sending command:
{
"message_id": "23",
"command": "device_command",
"args": {
"node_id": 2,
"endpoint_id": 1,
"cluster_id": 6,
"command_name": "Off",
"payload": null
}
}
[17.08.2024 19:31:09.718 INF] MatterServerClient.ReceiveFromWebSocket: 60 bytes received.
[17.08.2024 19:31:09.719 INF] Received response:
{
"message_id": "23",
"error_code": 8,
"details": ""
}

In the Python Matter Server log I get:

2024-08-17 19:31:09.717 (MainThread) ERROR [matter_server.server.client_handler] [548423327568] Error while handling: device_command (node 2): InvalidArguments

What is the problem with the "devive_command" message?

What argument is invalid?

[olavt]

It seems like the issue is using null for payload and not {} (empty object). Using null in the past was not triggering the InvalidArguments error.

Is this caused by a change in Python Matter Server, or in the Matter SDK?

[marcelveldt]

It seems like the issue is using null for payload and not {} (empty object). Using null in the past was not triggering the InvalidArguments error.

Is this caused by a change in Python Matter Server, or in the Matter SDK?

[marcelveldt]

null is an actual value - maybe better just omit the payload