ESPHome Smartmeter Reader for Wiener Netze

This is a custom component for ESPHome to integrate a smartmeter provided by Wiener Netze into Home Assistant via the infrared "Kundenschnittstelle". It gives power and energy readings, both positive and negative for active as well as reactive power.

Device Support

Supported and tested

• Siemens IM150
• Siemens IM151
• Siemens IM350
• Siemens IM351
• Landis + Gyr E450

Possibly supported but untested

• Landis + Gyr E570
• Iskraemeco AM550-TD0
• Iskraemeco AM550-ED0

If you have one of the untested devices (or any other devices supplied by Wiener Netze) and are willing to help me test this component, please open an issue.

Installation and usage

Add the following code to your yaml file. Dont forget to add your encryption key from the smartmeter website otherwise it will not work.

external_components:
  - source: github://bernikr/esphome-wienernetze-smartmeter@v1.0.1

logger:
  baud_rate: 0

uart:
  tx_pin: 1
  rx_pin: 3
  baud_rate: 9600

wienernetze:
  key: <enter your key here>

sensor:
  - platform: wienernetze
    active_energy_pos:
      name: Energy
    active_power_pos:
      name: Power
    active_energy_neg:
      name: Negative Energy
    active_power_neg:
      name: Negative Power
    reactive_energy_pos:
      name: Reactive Energy
    reactive_power_pos:
      name: Reactive Power
    reactive_energy_neg:
      name: Reactive Negative Energy
    reactive_power_neg:
      name: Reactive Negative Power

text_sensor:
  - platform: wienernetze
    active_energy_pos:
      name: Energy Raw
    active_energy_neg:
      name: Negative Energy Raw
    reactive_energy_pos:
      name: Reactive Energy Raw
    reactive_energy_neg:
      name: Reactive Negative Energy Raw

For every sensor normal esphome sensor configs can be used to set name, id, icon, etc. or add filters and so on.

Warning
All energy sensors roll over every 1000 kWh and start again from 0 due to precision issues of ESPHome. (Sensors are always 32bit floats. If the meter is too high the sensor cant update every Wh anymore.)
This is not a problem when using the active_energy_pos sensor for the energy dashboard in Home Assistant as it is set to total_increasing and therefore Home Assistant knows that a drop from 1000 to 0 is a reset of the counter and not a negataive consumption of 1000kWh.

As an alternative you can use the text_sensors which always result in the full counter of the meter (in Wh not kWh). To use them as a numeric sensor in Home Assistant you need to create a Template Sensor that takes the sensor and converts it into a numeric sensor:

{{ states("sensor.energy_raw") | float / 1000 }}

Tested Hardware

This component shoud work on all ESP8266 and ESP32 microcontrollers with an IR read-head attached to them. I used a ready made read-write head with an ESP01s built in that I got for 30€ on ebay. If they are advertised to be used with Tasmota, they should work.

Thanks

The following resources were much help in the development of this component:

• https://github.com/aldadic/esp32-smartmeter-reader
• https://github.com/aburgr/smartmeter-reader
• https://github.com/DomiStyle/esphome-dlms-meter
• https://www.lteforum.at/mobilfunk/wiener-netze-smart-meter-auslesen.16222/
• https://gist.github.com/pocki80/941fa090a8d6269a9b3b68c195f8750f

Thanks to the following people for helping test this component on different smartmeters:

• IM151: @cyranosaurus
• IM350: @coolduke666
• IM351: @elpollodiablo
• E450: @s00500