DSMR Slimme Meter

A sensor platform for Belgian, Dutch, Luxembourg and Swedish Smart Meters which comply to DSMR (Dutch Smart Meter Requirements), also known as ‘Slimme meter’ or ‘P1 poort’. Swedish meters with a ‘HAN port’ are not supported by this integration.

  • Currently support DSMR V2.2, V3, V4, V5, Belgian V5 variant, Luxembourg V5 variant (Smarty), Swedish V5 variant and the EasyMeter Q3D (Germany) through the dsmr_parser module by Nigel Dokter.
  • For official information about DSMR refer to: DSMR Document
  • For official information about the P1 port refer to: P1 Companion Standard
  • For unofficial hardware connection examples refer to: Domoticx
  • For official information about the Swedish variant refer to: Swedish specification.
  • Supports P1 cables integrated in a RFXtrx device.


  • For Belgian meters, choose DSMR version 5B
  • For Dutch meters, choose DSMR version 2.2, 4, or 5
  • For Luxembourg meters, choose DSMR version 5L
  • For Swedish meters, choose DSMR version 5S
  • For EasyMeter Q3D, choose DSMR version Q3D


To configure options for DSMR integration go to Settings -> Devices & Services and press Options on the DSMR card.

Time between updates

Typically the smart meter sends new data every 5-10 seconds. This value defines the minimum time between entity updates in seconds. Setting this value to 0 will update entities each time data is received from the smart meter.


Reducing the default time between updates will increase the amount of events generated and can potentially flood the system with events.

Supported meters

This integration is known to work for:

  • Iskra ME382 / MT382 (DSMR 2.2)
  • ISKRA AM550 (DSMR 5.0)
  • Landis+Gyr E350 (DMSR 4)
  • Landis+Gyr ZCF110 / ZM F110 (DSMR 4.2)
  • Kaifa E0026
  • Kaifa MA304C (DSMR 4.2)
  • Kamstrup 382JxC (DSMR 2.2)
  • Sagemcom XS210 ESMR5
  • Sagemcom T211
  • Ziv E0058 ESMR5
  • EasyMeter Q3D

M-Bus support

A smart meter can have multiple subdevices, also known as M-Bus devices. For the DSMR version 5B, support was added for water and gas M-Bus devices. This means you can have up to 4 subdevices on your DSMR meter. While previously only 1 gas meter was supported, there is now support for multiple gas and water meters.

Connecting to the meter

Connection can be done directly to the meter via a USB to serial connector, or through a serial to network proxy. It is also possible to connect to a RFXtrx device with an integrated P1 cables.

USB serial converters:

Docker users have to allow Docker access to the USB to serial converter by adding --device /dev/ttyUSB21:/dev/ttyUSB21 to the run command:

$ docker run --device /dev/ttyUSB0:/dev/ttyUSB0 -d --name="home-assistant" -v /home/USERNAME/hass:/config -v /etc/localtime:/etc/localtime:ro --net=host ghcr.io/home-assistant/home-assistant

Serial to network proxies:

DIY solutions (ESP8266 based):


To add the DSMR Slimme Meter integration to your Home Assistant instance, use this My button:

Optional configuration example for ser2net 3.x.x:

# Example /etc/ser2net.conf for proxying USB/serial connections to DSMRv4 smart meters


# Example /etc/ser2net.conf for proxying USB/serial connections to DSMRv2.2 smart meters

Optional configuration example for ser2net 4.x.x:

# Example /etc/ser2net.yaml for proxying USB/serial connections to DSMRv4 smart meters
connection: &con0096
    accepter: tcp,2001
    enable: on
      banner: *banner
      kickolduser: true
      telnet-brk-on-sync: true
    connector: serialdev,

Optional configuration example for Smart Meter Bridge:

serial_port: "/dev/ttyUSB0"
dsmr_version: "4"
  port: 9988

Technical overview

DSMR is a standard to which Dutch smartmeters must comply. It specifies that the smartmeter must send out a ‘telegram’ every 10 seconds (every second for DSMR 5.0 devices) over a serial port.

The contents of this telegram differ between version but they generally consist of lines with ‘obis’ (Object Identification System, a numerical ID for a value) followed with the value and unit.

Smart meters in Belgium, Luxembourg and Sweden provided telegrams with largely the same contents.

This module sets up an asynchronous reading loop using the dsmr_parser module which waits for a complete telegram, parser it and puts it on an async queue as a dictionary of obis/object mapping. The numeric value and unit of each value can be read from the objects attributes. Because the obis are know for each DSMR version the Entities for this integration are create during bootstrap.

Another loop (DSMR class) is setup which reads the telegram queue, stores/caches the latest telegram and notifies the Entities that the telegram has been updated.