DLMS library problem

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By Mohanraj , 28 December, 2020
Forums
General discussion

Hi Mikko,

We are trying to download profilegeneric data from meter using ANSI C library. At point DLMS stack is getting struck at getCount function . Attached Tx and Rx log also the function call history.
For your information , meter is working with GuruxDLMSExplorer

Tx : 7E A0 07 03 41 93 5A 64 7E
Rx : 7E A0 20 41 03 73 3E 9D 81 80 14 05 02 02 26 06 02 00 9B 07 04 00 00 00 01 08 04 00 00 00 01 B6 DC 7E

Tx : 7E A0 44 03 41 10 B3 E1 E6 E6 00 60 36 A1 09 06 07 60 85 74 05 08 01 01 8A 02 07 80 8B 07 60 85 74 05 08 02 01 AC 0A 80 08 31 31 31 31 31 31 31 31 BE 10 04 0E 01 00 00 00 06 5F 1F 04 00 00 1E 1D FF FF D4 34 7E
Rx : 7E A0 37 41 03 30 21 79 E6 E7 00 61 29 A1 09 06 07 60 85 74 05 08 01 01 A2 03 02 01 00 A3 05 A1 03 02 01 00 BE 10 04 0E 08 00 06 5F 1F 04 00 00 10 14 00 89 00 07 38 2C 7E

Tx : 7E A0 19 03 41 32 3A BD E6 E6 00 C0 01 81 00 07 00 00 5E 5B 0A FF 03 00 5D CB 7E
Rx : 7E A0 B4 41 03 52 96 31 E6 E7 00 C4 01 81 00 01 09 02 04 12 00 01 09 06 00 00 60 01 00 FF 0F 02 12 00 00 02 04 12 00 01 09 06 00 00 60 01 01 FF 0F 02 12 00 00 02 04 12 00 01 09 06 01 00 00 02 00 FF 0F 02 12 00 00 02 04 12 00 01 09 06 00 00 5E 5B 09 FF 0F 02 12 00 00 02 04 12 00 01 09 06 00 00 5E 5B 0B FF 0F 02 12 00 00 02 04 12 00 01 09 06 00 00 5E 5B 0C FF 0F 02 12 00 00 02 04 12 00 01 09 06 01 00 00 04 02 FF 0F 02 12 00 00 02 04 12 00 01 09 06 01 00 00 04 03 FF 0F 02 12 00 00 02 04 12 00 01 09 06 00 00 60 01 04 FF 0F 02 12 00 00 AB 60 7E

Tx : 7E A0 19 03 41 54 0A BB E6 E6 00 C0 01 81 00 07 00 00 5E 5B 0A FF 02 00 85 D2 7E
Rx : 7E A0 4D 41 03 74 EA FB E6 E7 00 C4 02 81 01 00 00 00 01 00 37 01 01 02 09 0A 07 50 44 4C 50 52 30 31 0A 0A 4C 61 6E 64 69 73 2B 47 79 72 0A 03 34 30 30 0A 01 34 0A 02 43 32 0A 08 31 30 2D 36 30 20 41 20 12 00 01 11 01 12 00 00 9C BA 7E

Tx : 7E A0 19 03 41 76 1A B9 E6 E6 00 C0 01 81 00 07 01 00 5E 5B 00 FF 03 00 4C 96 7E
Rx : 7E A2 21 41 03 96 AE 27 E6 E7 00 C4 02 81 00 00 00 00 01 00 82 02 09 01 26 02 04 12 00 08 09 06 00 00 01 00 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 1F 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 33 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 47 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 20 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 34 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 48 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 21 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 35 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 49 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 0D 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 0E 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 09 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 01 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 03 07 00 FF 0F 02 12 00 00 02 04 12 00 01 09 06 00 00 60 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 00 00 5E 5B 08 FF 0F 02 12 00 00 02 04 12 00 01 09 06 00 00 5E 5B 00 FF 0F 02 12 00 00 02 04 12 00 01 09 06 00 00 00 01 00 FF 0F 02 12 00 00 02 04 12 00 01 09 06 00 00 60 02 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 00 00 00 01 02 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 01 08 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 05 08 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 08 08 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 09 08 00 FF 0F 02 12 00 00 02 04 12 00 04 09 06 01 00 01 06 00 FF 0F 02 12 00 00 02 04 12 00 04 09 06 01 00 01 06 00 FF 0F 05 12 00 00 02 04 12 00 04 09 06 01 00 09 06 00 FF 0F 02 12 00 00 02 04 12 00 04 09 06 01 00 09 06 00 FF 0F 05 87 AB 7E

Tx : 7E A0 13 03 41 98 C4 6B E6 E6 00 C0 02 81 00 00 00 01 73 7F 7E
Rx : 7E A0 BC 41 03 B8 1A 9C E6 E7 00 C4 02 81 01 00 00 00 02 00 81 A5 12 00 00 02 04 12 00 03 09 06 01 00 17 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 2B 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 00 3F 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 01 18 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 01 38 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 01 01 4C 07 00 FF 0F 02 12 00 00 02 04 12 00 03 09 06 00 00 60 01 C9 FF 0F 02 12 00 00 02 04 12 00 04 09 06 01 00 01 04 00 FF 0F 02 12 00 00 02 04 12 00 04 09 06 01 00 01 04 00 FF 0F 05 12 00 00 E5 EB 7E

Thanks
Mohanraj

Mohanraj

5 years 5 months ago

Hi Mikko,

Any update please or any changes required from meter end?

Thanks
Mohan Raj

Kurumi

5 years 5 months ago

Hi,

Meter returns the wrong frame length. Max PDU size is 137 bytes and meter returns more than 500 bytes. You need to fix this.

BR,
Mikko

Mohanraj

5 years 5 months ago

Hi Mikko,

please suggest us where this has to be fixed?

Is it in meter firmware?
I do not think. Because GXDLMSDirector is working properly.

If it is in our application please tell us where and how?

Thanks
Mohanraj

Kurumi

5 years 5 months ago

Hi Mohanraj,

Yes, this is in meter firmware. The reason why GXDLMSDirector works is that it doesn't care how much memory is allocated. ANSI C version allocates only the needed amount of memory.

You can fix this to the client side if you change this line:
//Allocate 50 bytes more because some meters count this wrong and send few bytes too many.
con_initializeBuffers(connection, 50 + connection->settings.maxPduSize);

Change 50 to 500 and you can read your meter.

BR,
Mikko

Mohanraj

5 years 5 months ago

Hi Mikko,

Thank you for the suggestion. working after changing the buffer size at client side.

Thanks
Mohanraj

Kurumi

5 years 5 months ago

Hi,

I have to point out that this is only a fast fix. This should be fixed for the meter or it might cause problems later.

BR,
Mikko