smlpy enables reading of smart meter language (sml) data from a smart power meter ("Stromzähler"). This library is intended for newer smart meters which support publishing data through an IR sender. Older power meters are not supported.
You need a working IR-reading device for this, e.g. https://shop.weidmann-elektronik.de/index.php?page=product&info=24 which must be connected to a USB port.
Please note that this library only supports a small part of the SML-spec, especially the sending part is intentionally omitted
pip install smlpy
From the shell: go to the folder containing smlpy and modify data_reader.dump to account for your baudrate etc.
This should dump the readings to the shell:
python data_reader.py programmatic usage:
This dumps the results to the console:
from smlpy import data_reader
import asyncio
loop = asyncio.get_event_loop()
try:
loop.run_until_complete(data_reader.dump_results()) # todo set baud rate etc!
finally:
# see: https://docs.python.org/3/library/asyncio-eventloop.html#asyncio.loop.shutdown_asyncgens
loop.run_until_complete(loop.shutdown_asyncgens())
loop.close()If you need programmatic access to the data, use
from smlpy import data_reader
import asyncio
import serial
loop = asyncio.get_event_loop()
try:
default_port_settings = data_reader.PortSettings(port='/dev/ttyUSB0',
baudrate=9600,
bytesize=serial.EIGHTBITS,
parity=serial.PARITY_NONE,
stopbits=serial.STOPBITS_ONE,
wait_time=data_reader.WAIT_TIME)
async for result in data_reader.main(default_port_settings):
print(result.dump_to_json())
# e.g. save to DB
finally:
# see: https://docs.python.org/3/library/asyncio-eventloop.html#asyncio.loop.shutdown_asyncgens
loop.run_until_complete(loop.shutdown_asyncgens())
loop.close()- clone this project
- install pytest
- pytest test
- Optional:
- Please clone libsml-testing into a folder next to the smlpy folder
- Remove the
@pytest.mark.skip("manual only")flag and run also the test against other power meter data. A lot of the data is broken though
If you have additional data please add a test case and submit a PR
I have test this library with data from these devices:
- EMH EHZ-K (eHZ Generation K)
- EMH EHZ-361L5R
- EMH EHZ-HW8E2A5LOEK2P
- EMH EHZ-GW8E2A500AK2
- ITRON Openway 3
- ISKRA MT175 EHZ
- ISKRA MT691 EHZ
Does not work:
- HOLLEY DTZ541 ZDBA
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