Iskra MT880 does not respond on the serial port RS485

Hi Mikko.

I connected two RS485 converters to the electricity meter on one line, and the values from the first converter are displayed on the RX. Below is the command sent and the response that will be returned. Thank you very much for contacting me.

python3 main.py -S /dev/ttyUSB0:9600:8None1 -c 1 -s 145 -t Verbose

gurux_dlms version: 1.0.149
gurux_net version: 1.0.19
gurux_serial version: 1.0.20
Authentication: Authentication.NONE
ClientAddress: 0x1
ServerAddress: 0x91
Standard: Standard.DLMS
TX: 12:19:47 7E A0 08 02 23 03 93 3E 74 7E
Data send failed. Try to resend 1/3
Data send failed. Try to resend 2/3
RX: 12:20:17 A0 79 FB B9 F9 36 B0 34 00 A0 79 FB B9 F9 36 B0 34 00 A0 79 FB B9 F9 36 B0 34 00
DisconnectRequest

python3 main.py -S /dev/ttyUSB2:9600:8None1 -c 1 -s 145 -t Verbose

gurux_dlms version: 1.0.149
gurux_net version: 1.0.19
gurux_serial version: 1.0.20
Authentication: Authentication.NONE
ClientAddress: 0x1
ServerAddress: 0x91
Standard: Standard.DLMS
TX: 12:21:17 7E A0 08 02 23 03 93 3E 74 7E
Data send failed. Try to resend 1/3
Data send failed. Try to resend 2/3
RX: 12:21:32
DisconnectRequest

Hi.

I added New device with Address Type serial number. But after saving and trying to connect, the connection did not happen. I have tried various setting changes with no success.

Hi.

OK. I will not send the picture again. I feel that I have tried all possible communication speeds. Also server and client numbers with no response. Including Consereth. The owner of the electricity meter states: Communication through these interfaces is based on IEC62056-46 (HDLC) and allows the customer to read all profiles and measured data at any time. The customer has authorizations provided by security level "Authentication key 1". Communication speed is 9600 Bd, 8 data bits, no parity, 1 stop bit. The HDLC physical address for communication is 16 larger than the last digit of the serial number. That's 31+16=47. Access password "12345678".
It is strange that the gurux library writes TX: 15:36:22 03 00 09 7E A0 07 5F 03 93 CC 37 7E, but when I scan the given port using another device and the serial library, it does not show me any data that should be using the gurux library on port sent.

The Gurux library sends data to the port. The serial library will not print them until I send data from the serial library to the port. Subsequently, the serial library will list the data sent from both gurux and serial. The listing looks like this: b'?\x03\x00\t~\xa0\x07_\x03\x93\xcc7~\x03\x00\t~\xa0\x07_\x03\x93\xcc7~\x03\x00\t~ \xa0\x07_\x03\x93\xcc7~/?!hello\r\n'

Hi. Consereth added based on information from this forum. Without Consereth, the request looks like this:

7E A0 07 5F 03 93 CC 37 7E

Thanks
BR
Palo

Hi Mikko.

The meter is already responding. The error was in the connection under the seal, which I could not get to today.
The answer goes like this:

TX: 16:58:49 7E A0 08 02 5F 03 93 45 51 7E
RX: 16:58:49 7E A0 1F 03 02 5F 73 A7 28 81 80 12 05 01 9A 06 01 9A 07 04 00 00 00 01 08 04 00 00 00 01 CC A2 7E
TX: 16:58:49 7E A0 45 02 5F 03 10 80 5A 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 32 33 34 35 36 37 38 BE 10 04 0E 01 00 00 00 06 5F 1F 04 00 00 1E 5D FF FF A9 FD 7E
RX: 16:58:49 7E A0 38 03 02 5F 30 75 08 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 1E 1D 05 00 00 07 5B BA 7E
TX: 16:58:49 7E A0 1A 02 5F 03 32 0E 47 E6 E6 00 C0 01 C1 00 0F 00 00 28 00 00 FF 02 00 91 53 7E
RX: 16:58:49 7E A8 A4 03 02 5F 52 1C 20 E6 E7 00 C4 02 C1 00 00 00 00 01 00 82 04 F4 01 82 05 E8 02 04 12 00 08 11 00 09 06 00 00 01 00 00 FF 02 02 01 09 02 03 0F 01 16 01 00 02 03 0F 02 16 03 00 02 03 0F 03 16 03 00 02 03 0F 04 16 01 00 02 03 0F 05 16 03 00 02 03 0F 06 16 03 00 02 03 0F 07 16 03 00 02 03 0F 08 16 03 00 02 03 0F 09 16 01 00 01 06 02 02 0F 01 16 01 02 02 0F 02 16 01 02 02 0F 03 16 01 02 02 0F 04 16 01 02 02 0F 05 16 01 02 02 0F 06 16 01 02 04 12 00 1B 11 01 09 06 00 00 02 00 00 FF 4F 1E 7E
TX: 16:58:49 7E A0 08 02 5F 03 51 5B B4 7E
RX: 16:58:50 7E A8 A4 03 02 5F 54 2A 45 02 02 01 04 02 03 0F 01 16 01 00 02 03 0F 02 16 03 00 02 03 0F 03 16 03 00 02 03 0F 04 16 03 00 01 00 02 04 12 00 1D 11 02 09 06 00 00 02 01 00 FF 02 02 01 06 02 03 0F 01 16 01 00 02 03 0F 02 16 03 00 02 03 0F 03 16 03 00 02 03 0F 04 16 03 00 02 03 0F 05 16 03 00 02 03 0F 06 16 03 00 01 01 02 02 0F 01 16 01 02 04 12 00 1C 11 02 09 06 00 00 02 02 00 FF 02 02 01 07 02 03 0F 01 16 01 00 02 03 0F 02 16 03 00 02 03 0F 03 16 03 00 02 03 0F 04 16 03 00 02 03 0F 05 11 0D 7E

The meter is already responding. The error was in the connection under the seal, which I could not get to today.
The answer goes like this:

Can you please guide me how to get a response only from, for example, the OBIS code 1-0:1.8.0.255 or 1-0:2.8.0.255

Thank you very much.

BR
Palo

Could there be an error in authorization?

-------- Reading 8 0.0.1.0.0.255 Ch. 0 Clock object #1
TX: 21:18:24 7E A0 1A 02 5F 03 16 28 20 E6 E6 00 C0 01 C1 00 08 00 00 01 00 00 FF 01 00 08 30 7E
RX: 21:18:25 7E A0 08 03 02 5F 1F 51 05 7E
Error! Index: 1 Access Error : Unknown error.
Access Error : Unknown error.

BR

Palo

Hi Mikko.

I was unable to establish a connection using GXDLMSDirector. The meter responds to the query with the following command: python3 main.py -S /dev/ttyUSB0 -c 1 -s 47 -l 1 -a Low -P 12345678 -t Verbose . Is it possible to verify whether the electricity meter provides any information at the authentication level Low?

Hi Mikko.

Reading with GXDLMSDirector ends with an error: Access Error: Device reports Read-Write denied. The meter reads a list of registers, but no values.
In the case of an attempt to use High Authentication, meter is not connected and displays the error: Failed to receive reply from the device in given time.

Thanks.

BR
palo

Hi Mikko.

I am already reading the values via GXDLMSDirector.
Thank you very much for your help.

BR
Palo