Getting attribute values stored in GXDLMSObjects per attribute(GXDLMSAttributeSettings )

By Frank, 3 March, 2025
Forums
General discussion

Hi!

I have no problem getting the GXDLMSObject, casting it to a more specific object by objectType, and getting the stored/read values from the meter.

However, I want to get the values per attribute in the GXAttributeCollection Attributes property of the GXDLMSObject, not the exposed data stored in the other object properties such as LogicalName, Value etc.

I have tried to debug and explore the contents of an GXDLMSObject
before and after reading, before and after casting to a more specific object like GXDLMSData but the value in GXDLMSAttributeSettings in the GXAttributeCollection of the object is always empty.

What i want to do is to get the value per attribute easily bindable to a control without creating wrappers and such

For example to display,
Attribute Name | Attribute Index | Value | Access Rights

i see the object GetValue(GXDLMSSettings settings, ValueEventArgs e) from the IGXDLMSBase but i dont know where the valueeventargs comefrom or hwo to mock it to get a value for a specific attribute

Frank

8 months 2 weeks ago

Update:

I was able to get the values via
var val = (obj as IGXDLMSBase).GetValue(dev.Comm.client.Settings, new Gurux.DLMS.ValueEventArgs(obj, index, index, null));

im a little confused tho since some vals return byte[] some return strings

i am a little confused as to what the selector is for in the valueeventargs

Kurumi

8 months 2 weeks ago

Hi,

The attribute value depends on the COSEM object type. GetValue returns the value that is written to the meter.

I believe that the best approach for you is to use the GetValues method and then get the value using the attribute index to get the attribute value.

BR,
Mikko

Frank

8 months 2 weeks ago

Hi thank you for the reply

ive decided to do so right now and just get the object item based on the attribute index

i didnt want to do this because ive had cases where some objects dont show the LN in the getvalues method so the object index and attribute index are off by 1 but ive tested it again and ive yet to encounter it
I'll add it here if I ever encounter it again and can be replicated

Kurumi

8 months 2 weeks ago

Hi,

You can get the logical name of the COSEM object from attribute index #1. You just need to decrease the attribute index by one to get the object index.

BR,
Mikko