I'm experiencing issues with DLMS/COSEM communication when trying to read profile data from an electricity meter. While the initial connection is successful, reading profile data results in invalid HDLC frames.

Environment:
- Python with Gurux DLMS library
- TCP/IP connection to the meter
- Authentication Level: Low
- Using HDLC protocol

The connection parameters:
- IP: xx.xx.xx.xx
- Port: xxxx
- Client Address: xx
- Server Address: derived from meter serial number
- Password: ********

Hi Gurux Team and Community,

I'm working with GXDLMSDirector to communicate with DLMS/COSEM meters. I'm trying to understand the differences in decryption when using the "Indian Standard" manufacturer cell setting compared to other available options.

Specifically, I'd like to know:

Hi,

Dear Mikko,

I am using an Indian standard meter, and while parsing push data, I encountered an "Invalid Count" exception in the gXDLMSSecureClient.GetData(data, replyData, notify) function.

The same function works correctly with push data from other meters.

Could you please suggest what might be causing this issue?

Hi,

I have a problem reading scalars and units from a DLMS/COSEM counter correctly using the Gurux.DLMS library in Python. I am trying to read data from a Profile Generic object with OBIS code 1.0.99.1.0.255.

When I read the data, the values ​​are returned in raw form (e.g. 2923 instead of 2.923). Even though I read the scales and units from the attribute of 3 registry objects (REGISTER or EXTENDED_REGISTER), the scales are always 1 and the units are empty.

I am attaching the code:

Hi, Mikko!
I got lates Gurux C and on call function
uint32_t secs_epoch = time_toUnixTime2(tmp->dateTime);
get wrong time in seconds since epoch.

dlmsVARIANT* tmp = NULL;
ret = va_getByIndex(lst_values, column, &tmp);
if (ret != DLMS_ERROR_CODE_OK)
{
return ret;
}
//here tmp is DateTime:
tm_sec 0
tm_min 0
tm_hour 17
tm_mday 27
tm_mon 0
tm_year 125
tm_wday 1
tm_yday 26
tm_isdst 0

From what I understand, it is possible to somehow calculate the server address from the serial number. How exactly do I do this?

Thanks in advance

Hi, Mikko!
I got lates version Gurux C and get error in row 78:
identifier "gxByteBuffer" is undefined \src\serverevents.c 78

I think need to add

#include "../include/bytebuffer.h"

Thanks!

i'm running the c# simulator with the following parameters:

-i WRAPPER -h 127.0.0.1 -p 4060 -t Verbose -x crystal.xml

my client is sending
RX: 00 01 00 10 00 01 00 12 60 10 A1 09 06 07 60 85 74 05 08 01 01 A9 03 02 01 01

and the simulator is responding with
TX: 00 01 00 01 00 10 00 26 61 24 A1 09 06 07 60 85 74 05 08 01 01 A2 03 02 01 01 A3 05 A1 03 02 01 01 A7 03 02 01 01 BE 06 04 04 0E 01 06 02

it looks like the root cause is this 'return' in GXAPDU.ParseApplicationContextName():

HI MIkko,