Matter version of Weather Station example is ignoring the specification

[Paul Targosz]

brief: 

The Zigbee version fo the example was ported to matter. Both standards use ZAP files for the definitions, but have smaller differences in their specification. The Matter examples ignores one detail. 

details: 

It's all about the pressure sensor of the weather station. It's used as an air pressure sensor for obvious reasons. 

Pressure clusters have the cluster ID 773 or 0x0305.

definition zigbee:

4.5 Pressure Measurement

4.5.1 Overview Please see Chapter 2 for a general cluster overview defining cluster architecture, revision, classification, identification, etc. The server cluster provides an interface to pressure measurement functionality, including configuration and provision of notifications of pressure measurements.

src: zigbeealliance.org/.../07-5123-06-zigbee-cluster-library-specification.pdf

definition matter device: 

7.5. Pressure Sensor
A Pressure Sensor device measures and reports the pressure of a fluid.

src: matter device library 

special detail:

This was only for the device! Not for the cluster itself!

definition matter pressure cluster:

This cluster provides an interface to pressure measurement functionality, including configuration
and provision of notifications of pressure measurements.

quote of the zap file (with marking):

"endpoints":[{

• "endpointTypeName":"Anonymous Endpoint Type",
• "endpointTypeIndex":0,
• "profileId":259,
• "endpointId":0,
• "networkId":0,
• "endpointVersion":1,
• "deviceIdentifier":22

},{

• "endpointTypeName":"Anonymous Endpoint Type",
• "endpointTypeIndex":1,
• "profileId":259,
• "endpointId":1,
• "networkId":0,
• "endpointVersion":1,
• "deviceIdentifier":770

},{

• "endpointTypeName":"Anonymous Endpoint Type",
• "endpointTypeIndex":2,
• "profileId":259,
• "endpointId":2,
• "networkId":0,
• "endpointVersion":1,
• "deviceIdentifier":775

},{

• "endpointTypeName":"Anonymous Endpoint Type",
• "endpointTypeIndex":3,
• "profileId":259,
• "endpointId":3,
• "networkId":0,
• "endpointVersion":1,
• "deviceIdentifier":773 <---- this line defines the "fluid pressure" device 

}

extra info:

I did not use zigbee. Maybe it's also wrong there.

[Marte Myrvold]

Hi,

I do not understand what you mean is incorrect or ignored in the Matter weather station. According to the Matter Device Library specification (as well as the Zigbee specification), the Pressure Sensor device is used to measure the pressure of a fluid, and a fluid can be liquid or gas. In this case, it is used to measure the pressure of a gas, namely air pressure. I also verified that the mandatory clusters are added to the device in ZAP. 

Best regards,

Marte

[Paul Targosz]

Ohh you're right..

It was some kind of misunderstanding based on language differences. 

Fluid is (depending on context) synonymously to liquid in german... will close it since its obviously wrong :D

[Marte Myrvold]

Hi,

I am glad I could clear that up! It is like that in Norwegian as well, so I understand how it can easily be misunderstood 

Best regards.

Marte