Add support for Iskra IE.5 (Belgium)

[ljehu]

Modified regex in obis_references.py to recognize multiple belgian devices.

[ndokter]

Thanks for the PR! There are some tests which need to be fixed first

[anthares]

Hi @ljehu,

I just got the same smart meter installed but from another grid provider in Belgium (AIEG).
I'd like to see this merged, but I don't know how I could help on this MR.

Feel free to let me know :)

Kind regards,

Nicolas

[anthares]

Hi @ndokter,

I made some test of this change locally to try to understand why tests are failing.
I'm not a seasoned python dev (coming from Java world), but here is what I found.

Current change in version information regex makes parser fail to retrieve the right line in the telegram data.
Instead of finding a single string, it finds a tuple of other strings, due to the addition on regex groups in the regex.

My feeling is, after some debug, is that just changing the regex won't work with the way the parser works right now. Making the parser compatible with those regex groups is way above my current skills.
So I think the right way to go, and the safest, is to introduce another value for dsmr_version in protocol.py with corresponding specs in telegram_specifications.py and proper testing.

So, sorry to bother you on this, but I want your advice before going further.
I'm ready to create another PR for that, I just want to make sure this is how it should be done :)
I'm also open to suggestion for the dsmr_version value to introduce.

Best regards,

Nicolas

[ndokter]

Hi @anthares, sorry for the late response. I will try to get back to you