DSMR MQTT (FORKED FOR ENCRYPTED SMART READERS IN AUSTRIA)

This fork adds the encryption used by some power providers to dsmr2mqtt.

Basically all you need to do is to copy config.rename.py to config.py and adjust the settings for:

• MQTT Broker
• Provided keys from the power company. You might need to send them a polite email. They shouldn't have an issue with providing the keys.
• Test by running python3 dsmr-mqtt.py. If you can see the decrypted data, proceed.

---

• Run cp systemd/dsmr-mqtt.service /etc/systemd/system/dsmr-mqtt-service
• Run systemctl enable power-mqtt.service to execute the script

---

• Used P1 cable: https://www.amazon.de/dp/B07JW75BZ7?psc=1&ref=ppx_yo2ov_dt_b_product_details
• Script is running on a Raspi 3B+

---

HomeAssistant

• Create a Riemann sum integral sensor, set the MQTT sensor value sensor.momentane_wirkleistung_bezug_w as entity, use kilo as metric and hourly as scale.
• Create an Utility Meter with the sensor created above and set Meter reset cycle to never.
• Go to https://my.home-assistant.io/redirect/config_energy/, press Add Consumption and add the created Utility Meter sensor.
• Done

Original Text

MQTT client for Dutch Smart Meter (DSMR) - "Slimme Meter". Written in Python 3.x

Connect Smart Meter via a P1 USB cable to e.g. Raspberry Pi.

Application will continuously read DSMR meter and parse telegrams. Parsed telegrams are send to MQTT broker.

Includes Home Assistant MQTT Auto Discovery.

In dsmr50.py, specify:

• Which messages to be parsed
• MQTT topics and tags
• MQTT broadcast frequency
• Auto discovery for Home Assistant

A typical MQTT message broadcasted {"V1":226.0,"V2":232.0,"V3":229.0,"database":"dsmr","el_consumed":24488767.0,"el_returned":21190375.0,"p_consumed":1130.0,"p_generated":0.0,"serial":"33363137","timestamp":1642275125}

A virtual DSMR parameter is implemented (el_consumed and el_returned, which is sum of tarif1 and tarif2 (nacht/low en day/normal tariff)) - as some have a dual tarif meter, while energy company administratively considers this as a mono tarif meter.

Usage:

• Copy systemd/power-mqtt.service to /etc/systemd/system
• Adapt path in power-mqtt.service to your install location (default: /opt/iot/dsmr)
• Copy config.rename.py to config.py and adapt for your configuration (minimal: mqtt ip, username, password)
• sudo systemctl enable power-mqtt
• sudo systemctl start power-mqtt

Use http://mqtt-explorer.com/ to test & inspect MQTT messages

A test/dsmr.raw simulation file is provided. Set PRODUCTION = False in config.py to use the simulation file. No P1/serial connection is required.

Requirements

• paho-mqtt
• pyserial
• python 3.x

Tested under Linux; there is no reason why it does not work under Windows. Tested with DSMR v5.0 meter. For other DSMR versions, dsmr50.py needs to be adapted. For all SMR specs, see netbeheer

Licence

GPL v3

Versions

2.0.0 - 2.0.1

• Updated mqtt library
• Removed need for INFLUXDB label
• Added telegraf-dsmr.conf
• Added example (dsmr50_Stromnetz_Graz_Austria.py) for Austria dsmr (Stromnetz Graz, by karlkashofer)

1.0.13

• Add zero/non-zero check on data (as sometimes eg gas and power consumed values in influxdb became zero)

1.0.12

• Fix exit code (SUCCESS vs FAILURE)

1.0.2 - 1.0.4:

• Potential bug fix in parser
• Add MQTT last will/testament

1.0.0:

• Initial release