iec62056 0.5.1

Library to parse IEC62056/IEC1107/DSMR telegrams

iec62056

a robust IEC1107/IEC62056 parser in Python.

This library is meant to parse IEC1107/IEC62056 telegrams in Python. You'll need this to process information from your smart meter (e.g. DSMR P1). The code differs from other libraries in several ways:

• It actually parses the messages using a (EBNF) grammar. This makes the parsing robust and extendable.
• It is designed as an external library instead of being inseperable with other software components (such as P1 serial readers).
• It aims to handle all IEC 62056 formatted telegrams, not only DSMR. I needed this, because of my IEC 1107 speaking district heat meter, which resembles DSMR.

Compatibility

This module is targeted to be compatible with all kinds of digital meters outputting IEC62056 formatted telegrams. It implements several (sub)standards.

Standards

The module implements the following standards:

• IEC 1107/IEC 62056-21 (COSEM, OBIS). IEC 1107 was superseded by IEC 62056
• DSMR (versions 2.2, 4.0, 4.0.5, 4.0.7, 4.2, 5.0)

Data types

These data types are recognised:

• Standard COSEM OBIS register
• COSEM OBIS timestamped register (e.g. gas via M-Bus)
• Profile Generic (e.g. power failure logs)

Equipment

Testing was done with sample telegrams from the following meters:

• Kamstrup Multical 66C (district heating meter)
• Kaifa MA 105
• Iskra AM 550
• Iskra MT 382
• Landis + Gyr E350/ZCF110
• ZIV 5CTA3 (aka Enexis ESMR5)

Usage

$ pip install iec62056
$ python3
>>> import iec62056
>>> p = iec62056.parser.Parser()
>>> t = p.parse(b'... your telegram ')
>>> print(t.keys())
>>> for k in t.keys():
...   o = t[k]
...   if isinstance(o, iec62056.objects.Register):
...     print('  {} = {}'.format(k, o.value))
>>>

Thanks

Since specs on IEC 62056/1107 and DSMR can sometimes be tough to find or interpret, I used a lot of concepts from other projects. I've used knowledge from these projects:

• Nigel Dokter's dsmr_parser
• Matthijs Kooijman's arduino-dsmr
• Levien van Zon's dsmr-p1-parser
• OpenHAB addon repository