matter: Modify devicetypellist in descriptor cluster of root node

[samrou]

Hello, I'm new with matter protocol and api provided with nrf connect sdk 5.

I worked with zap to describe end point and select all the culster i want to implemented.

My application is working well but in the root node i have to specify in the devicetypelist attribute of descriptor cluster that powersource cluster is present. (useful to tell client that they can have access to battery information).

By default the list contain only the root id 0x0016 with revision 1.

I try to modify this by using const EmberAfDeviceType PowerSourceDeviceTypes[] ={{0x0016,1},{0x0011,1}};  and emberAfSetDeviceTypeList(0, (Span<const EmberAfDeviceType>(PowerSourceDeviceTypes,2)));

The result is that i can see that the devicetypelist is growing to two but the value of the data type and revision are incorrected. This values take teh maximum value 0xffff abd 0xff.

I found that the chip::app::Clusters::Descriptor::Structs::DeviceTypeStruct exist but i didn't know are to use it.  I didn't see anything in the endpoint_config.h file (generated by zap)  to modify to do what i want.

What am I missing to do or am i doing wrong ?

[Maria Gilje]

Hello,

I will help you with this. Please provide the following information:

Which nRF Connect SDK version are you using?

Are you using a Matter sample as a basis?

Have you read our documentation on the ZAP tool, and how to add and edit clusters in your Matter application?

Best regards,

Maria

[samrou]

Hello,

i use the nRF Connect SDK v2.2.0 for matter 1.0.

I begin with nrf/mattet/template  after having try to modify /mnrf/matter/lock.

Even if all part of my matter application work, i try to compare with other example lock, light_bulb, light_switch to see if they have a devicetypelist  greater than 1.

I'm successfully use zap to modify all my need (create 2 more endpoint that root, with cluster) and all is well working.

But impossible to add more than one devicetype in the list in the descriptor cluster of the root node

[samrou]

So is there any solution to modfify the array to have 2 or more devicetype struc element in the list ?

[Maria Gilje]

Hello,

You can add new endpoints with their own device type by using the ZAP tool. Is this what you are trying to do?

One step which is not included in the documentation is that the ZAP tool should be opened with the run_zaptool.sh script found at <ncs-installation>/modules/lib/matter/scripts/tools/zap.

Best regards.

Maria

[samrou]

Hello, i have already done that but i want to modify devicetypelist attribute of descriptor cluster, and i can't.

Neither by zap no by code.

 

Zap doesn't allow array, return invalid integer out of range.

by code :

const EmberAfDeviceType PowerSourceDeviceTypes[] ={{0x0016,1},{0x0011,1}}; 
emberAfSetDeviceTypeList(0, (Span<const EmberAfDeviceType>(PowerSourceDeviceTypes,2)));

//also try
//emberAfSetDeviceTypeList(0, Span<const EmberAfDeviceType>(PowerSourceDeviceTypes));

in chip-tool-debug :

chip-tool-debug descriptor read device-type-list 1 0

well return an array of 2 devicetypestruct (with devicetype and revision), but the value are not 0x16 and 0x1, there are the max value 0xFFFF and 0xFF for the 2 devicetype in the list.