Simple-dsmr

A simple DSMR to MQTT script.

All units (except power tariff) are rounded to 2 decimals.

Supported messages

Name	unit	DSMR code	MQTT topic
power consuption	kW	1.7.0	dsmr/power_consuption
power prduction	kW	2.7.0	dsmr/power_production
total consuption low	kWh	1.8.1	dsmr/total_consuption_low
total consuption high	kWh	1.8.2	dsmr/total_consuption_high
total production low	kWh	2.8.1	dsmr/total_production_low
total production high	kWh	2.8.2	dsmr/total_production_high
total gas	m3	24.2.1	dsmr/total_gas
power tariff	1 = low, 2 = high	96.14.0	dsmr/power_tariff

Hardware Requirements

• Rasberry pi .
• P1 serial cable.

Software requirements

• Basic linux os for Raspberry pi (ex. Raspbian Lite).

Install required packages:

pyserial

sudo pip install pyserial

paho-mqtt

sudo pip install paho-mqtt

Settings

Copy config-example.ini to config.ini and fill in the correct data.

Serial

Setting	default	Description
baudrate	115200	baudrate
port	/dev/ttyUSB0	port on Pi

MQTT

Setting	default	Description
client	p1	client name
broker	-	broker address
user	-	broker user
password	-	user password
topic	dsmr	topic

Create Service

To run the script in the background, and on boot, we need to create a service.

Create a service

sudo vi /lib/systemd/system/dsmr.service

Paste the code and save.

[Unit]
Description=Simple DSMR Service
After=multi-user.target
[email protected]

[Service]
Type=simple
WorkingDirectory=/home/pi/dsmr
ExecStart=/usr/bin/python /home/pi/dsmr/read.py
StandardInput=tty-force
StandardOutput=syslog
StandardError=syslog
Restart=on-failure
RestartSec=10
KillMode=process

[Install]
WantedBy=multi-user.target

(Update path to file if needed).

Reload the service

sudo systemctl daemon-reload

Enable the service

sudo systemctl enable dsmr.service

Start the service

sudo systemctl start dsmr.service

Check service status

sudo systemctl status dsmr.service

It should show "Active: active (running)".

TO-DO's

• Error handling (mqtt & serial).
• Serial port listener (instead of loop).
• Adding more DSRM values.
• Use Daemon instead of Service.
• This README.