Reading HXE smart meter using optical head with python

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By klem_ai , 11 October, 2019
Forums
General discussion

Hello, I am trying to read from HXE energy meter using optical probe. From the documentation, the meter works with Protocol mode E. Is there a python Library i can use to get this done, and also do i need any information before i can read from it?
Currently when I send '/?!\r\n', I get '/HXE5\2HXE12' as reply from the meter. what do i need to do next?

Thanks

Kurumi

6 years 7 months ago

Hi,

Can you try to read your meter with GXDLMSDirector first? I'll help you to read it with python after that.
When you can read your meter with GXDLMSDirector I know that communication between the PC and the meter is working.

BR,
Mikko

klem_ai

6 years 7 months ago

done!.. tried using NO/LOW authentication but i couldn't read the values. I was only able to read only using High authentication with password '00 00 00 00 00 00' . at least i want to read voltage and current and was able to do that. I now need to implement this high authentication setting and read out using either python or C/C++. I need help

Thank you,

Image

Kurumi

6 years 7 months ago

Hi,
Python is not support High authentication at the moment. We'll relese version at the end of this month that can read it. You can use ANSI C or ANSI C++ version.

Check the client example. It does what you want to do.

BR,
Mikko

klem_ai

6 years 7 months ago

Hello,

I have downloaded the ANSI C++ library, i ran make on the makefile in the development folder and it was successful, I also ran make in the GuruxDLMSClientExample folder after creating obj and bin directories.
Now, how can i run the GuruxDLMSClientExample.cpp file on a linux machine(Raspbian) ?

Kurumi

6 years 7 months ago

Hi,

Executable is found from bin-folder. The command-line parameters are the same.

BR,

Mikko

klem_ai

6 years 7 months ago

Thanks a lot. now i am getting passed the iec handshake, but afterwards i get "SNRMRequest failed 252". I am using a raspberry pi board

Kurumi

6 years 7 months ago

Hi,

Did you change the client address and password?

BR,
Mikko

klem_ai

6 years 7 months ago

I passed it in as command from terminal bin directory as >>

$./gurux.dlms.client.bin -i -S /dev/ttyUSB0 -a High -P "00 00 00 00 00 00" -t Verbose

it only got passed the iec handshake

Kurumi

6 years 7 months ago

Hi,

You need to hard-code the password. It's handled as a string and your meter expects that it's hex string.
The client example can handle only strings at the moment.

BR,

Mikko

klem_ai

6 years 7 months ago

Hello,

The python update for high authentication, will it be available for use this month end? as you said

Thanks

Kurumi

6 years 7 months ago

Hi,

We are testing it at the moment.

BR,

Mikko

Kurumi

6 years 7 months ago

Hi,

There is a new version available from client example also in GitHub.
You can use High authentication like this:

-h localhost -p 4061 -a High -P Gurux

BR,

Mikko

klem_ai

6 years 7 months ago

Hi,

I am using optical probe to read from the meter. will this still work?

Thanks

Kurumi

6 years 7 months ago

Hi,

Try to add -i parameter. It depends on the meter is IEC 62056-21 needed when connection is started.
Most European meters are using it, but several India or China meters are not used it.

BR,

Mikko

klem_ai

6 years 7 months ago

hello kurumi,
i have tried the new python library update and even hard coded the password. and when i check the log file, it's not receiving anything yet. please help

above contain screen shots of the hard coded password part and also results from running
$ python3 main.py -i -S /dev/ttyUSB0 -a HIGH -P "00 00 00 00 00 00" and still yet nothing is received when i check the log file

klem_ai

6 years 7 months ago

code output
pi@raspberrypi:~/Gurux.DLMS.Python-master/Gurux.DLMS.Client.Example.python $ python3 main.py -i -S /dev/ttyUSB0 -a HIGH -P '00 00 00 00 00 00'
password: 3030203030203030203030203030203030
Authentication: Authentication.HIGH
ClientAddress: 0x10
ServerAddress: 0x1
Data send failed. Try to resend 1/3
Data send failed. Try to resend 2/3
RX: 19:38:21
DisconnectRequest
Traceback (most recent call last):
File "main.py", line 80, in main
reader.readAll()
File "/home/pi/Gurux.DLMS.Python-master/Gurux.DLMS.Client.Example.python/GXDLMSReader.py", line 423, in readAll
self.initializeConnection()
File "/home/pi/Gurux.DLMS.Python-master/Gurux.DLMS.Client.Example.python/GXDLMSReader.py", line 235, in initializeConnection
self.readDLMSPacket(data, reply)
File "/home/pi/Gurux.DLMS.Python-master/Gurux.DLMS.Client.Example.python/GXDLMSReader.py", line 91, in readDLMSPacket
self.readDLMSPacket2(data, reply)
File "/home/pi/Gurux.DLMS.Python-master/Gurux.DLMS.Client.Example.python/GXDLMSReader.py", line 142, in readDLMSPacket2
raise e
File "/home/pi/Gurux.DLMS.Python-master/Gurux.DLMS.Client.Example.python/GXDLMSReader.py", line 134, in readDLMSPacket2
raise TimeoutException("Failed to receive reply from the device in given time.")
gurux_common.TimeoutException.TimeoutException: Failed to receive reply from the device in given time.
Ended. Press any key to continue.

Kurumi

6 years 7 months ago

Hi,

Your hard coded pasword is 3030203030203030203030203030203030.
It should be 00 00 00 00 00 00.

BR,
Mikko

klem_ai

6 years 7 months ago

hello,

tried that two, noticed the -i doesn't flag the iec true, i had to hard code it and the initialization function is now being called. I don't receive any response when it sends "/?!\r\n", i get failed to receive media or something. I have tried so many combinations but i still havn't read from the meter. I can read it through GXDLMSDirector but i want to read it with python. I am using optical head via serial.