Read ISKRA AM550 P1 port (Switzerland)

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By jb , 10 March, 2023
Forums
Gurux.DLMS

I'm trying to read the data from my ISKRA AM550 but I still only manage to get binary response that I cannot interpret. What I know:

- Electricity counter AM550 from ISKRAEMECO with P1 port
- serial cable P1 to USB port
- My provider states the following info:
- interface is P1 DSMR 5.0
- protocol: DLMS/COSEM
- frame length: 154 bytes (no idea where and if i need this parameter)
- 115200, 8bits, no parity, 1 stop bit.
- data pushed every 5 sec
- the data are not "in clear" but they are not encrypted.
- According to the last point above, I have no key from my provider.
- Plus I have a list of OBIS codes like "1-0:1.7.0 -> instantaneous power", etc.

What I have tried:
- installed Gurux.DLMS.Client.Example.python
- setup env according to your video
>>> python main.py -S /dev/ttyUSB0:115200:8None2 -t Verbose
which spits out:

gurux_dlms version: 1.0.141
gurux_net version: 1.0.19
gurux_serial version: 1.0.20
Authentication: Authentication.NONE
ClientAddress: 0x10
ServerAddress: 0x1
Standard: Standard.DLMS
TX: 12:09:16 7E A0 07 03 21 93 0F 01 7E
<Int16 Value="0202" />

<Int16 Value="0202" />

The last line repeats endlessly every ~5 seconds

I also printed the binary response I get when connecting to the serial port, here is one of the message (again coming every 5 sec.):

7e
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

I tried to understand it with the help of your translator but did not manage.

Any hint would be greatly appreciated.
Thanks
JB