DLMS Push data objects with Attribute Index 0

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By Ruhan.vanderBerg , 15 February, 2022
Forums
Gurux.DLMS

Hello,

I have a DLMS meter that is pushing data from their side to my GXDLMSPushListener, and in the objects list of the push data is:
GXDLMSData with AttributeIndex of 2 and DataIndex of 0,
GXDLMSRegister, with AttributeIndex of 0 and DataIndex of 0.

I can parse the incoming data, but it ultimately fails at the GetDataType(int index) call of the GXDLMSRegister class. The index is 0, so I understand that there is no "Structure" defined for index 0.
The parsed data looks like this before calling the UpdateValue method in GXDLMSPushSetup.cs (first image):
https://imgur.com/a/xIg1jKQ (apologies for the imgur link)
From the image, the first entry is the Logical Name, value of 0, and the last value is a array of two values, corresponding to Scaler and Unit. (GXStructure)

Is there any way that we can parse this, and/or make a modification to parse this array of objects on the GXDLMSRegister class?

Kurumi

4 years 3 months ago

Hi,

Can you add a hex string from the push message so I can check it and tell you how to handle it? Content of the push messages is not defined on the DLMS standard and there are a few different ways to handle it.

BR,
Mikko

Ruhan.vanderBerg

4 years 3 months ago

Hello,
The incoming push message is encrypted, here is the message in XML and hex after decryption:
Hex: 02 02 09 08 31 32 33 34 35 36 37 38 02 03 09 06 01 00 01 08 00 FF 06 00 00 00 00 02 02 0F 00 16 1E

XML:
<Structure Qty="02" >
<OctetString Value="3132333435363738" />
<Structure Qty="03" >
<OctetString Value="0100010800FF" />
<UInt32 Value="00000000" />
<Structure Qty="02" >
<Int8 Value="00" />
<Enum Value="1E" />
</Structure>
</Structure>
</Structure>

I hope that this is what you are looking for?

Kurumi

4 years 3 months ago

Hi Ruhan,

This was exactly what I was looking for. Yes, your meter is sending register objects using attribute index zero. We haven't read meters that are using attribute index zero in push messages.
I created an issue from this:
http://www.gurux.fi/node/19684

This is now improved and tests start tomorrow. The new version is released on Monday.

BR,
Mikko