Add-on request : wmbusmeter

Feature Requests
13

I am successfully running this on Home Assistant Blue for a couple of weeks now. I purchased the M871A-USB - Wireless M-Bus USB-adapter 868 MHz from IMST (good for EU, because they are in Germany). Installed wmbusmeters as HA add-on by adding the repository according to the instructions here. The USB radio was discovered automatically by the add-on and it soon discovered my meters in the Log tab. Then it was just a matter of adding them in the wmbusmeters config like this:

name=ColdWater driver=apator162 id=12345678 key=00000000000000000000000000000000
name=HotWater driver=apator162 id=12345678 key=00000000000000000000000000000000

You will obviously need to adjust these values based on the Log. I was lucky there is no encryption on my meters. Then I added the following to my configuration.yaml to make the entities show up in HA:

mqtt:
  sensor:
    - state_topic: "wmbusmeters/ColdWater"
      json_attributes_topic: "wmbusmeters/ColdWater"
      unit_of_measurement: "m³"
      state_class: total_increasing
      device_class: water
      value_template: "{{ value_json.total_m3 }}"
      name: Cold Water
      icon: "mdi:gauge-low"
      unique_id: cold_water
    - state_topic: "wmbusmeters/HotWater"
      json_attributes_topic: "wmbusmeters/HotWater"
      unit_of_measurement: "m³"
      state_class: total_increasing
      device_class: water
      value_template: "{{ value_json.total_m3 }}"
      name: Hot Water
      icon: "mdi:gauge"
      unique_id: hot_water

Finally I set-up some Utility Meter helpers in the HA UI to calculate the current (hourly, 15 minutes, etc.) consumption from the increasing totals reported by the meters.

image
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I am still trying to figure out how to make it work in the Energy dashboard, because none of the meters show up currently. I had a bug in the configuration, which is now fixed - for the meters to show up in the Energy dashboard, you have to use m³ instead of m3 as unit of measurement.

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