Improve compatiblity with Belgian standard

[gigatexel]

Gas meter

The code listed BELGIUM_HOURLY_GAS_METER_READING for the gas-meter. This is incorrect, since the gas-meter updates the meter reading every 5 minutes. Reference: https://www.fluvius.be/nl/thema/meters-en-meterstanden/digitale-meter/maak-je-meter-slim

De P1-poort stuurt per seconde de elektriciteitsdata en per 5 minuten de gasdata rechtstreeks uit. De digitale gasmeter stuurt de gasdata door via de digitale elektriciteitsmeter. Via de P1-poort zijn je verbruik (kWh), actief vermogen (kW) en enkele kwaliteitsgegevens beschikbaar.

Current/Power limitation

The Belgian digital meter has the ability to limit current/power, for instance when clients are dropped or their credit has run out. This has been added.

References:

• Slide 47: https://www.fluvius.be/sites/fluvius/files/2020-01/dmk-demo-v2.1-rtc.pdf
• https://jensd.be/1205/linux/data-lezen-van-de-belgische-digitale-meter-met-de-p1-poort

[ndokter]

Thanks for the contribution! Ill make a new release soon

[ndokter]

Could you maybe fix these small code style issues?

dsmr_parser/telegram_specifications.py:158:7: W291 trailing whitespace [pycodestyle]
dsmr_parser/obis_name_mapping.py:55:39: E203 whitespace before ':' [pycodestyle]

[gigatexel]

Could you maybe fix these small code style issues?

dsmr_parser/telegram_specifications.py:158:7: W291 trailing whitespace [pycodestyle]
dsmr_parser/obis_name_mapping.py:55:39: E203 whitespace before ':' [pycodestyle]

Thank you for pointing that out. I corrected these issues.