MQTT Topic defintion

Configuration
1

I have a Pixii Energy Storage Unit from which I’d like to get data for the HA Energy Dashboard. I can “listen” to the MQTT data stream from Pixii losing the HA Configuration Tool Listener, however only to Topics that contain several separate data elements.

When using the Topic pixii/status/253101100376/meter_ext6 I get the data for the whole Topic:
pixii/status/235101100376/meter_ext6 {“m_ts”:“2025-04-24T10:52:12.084Z”,“meter_a1”:13.9189,“meter_a2”:13.8863,“meter_a3”:13.8804,“meter_kwh_exp”:0.387,“meter_kwh_imp”:460.961,“meter_source”:“Front”,“meter_v1”:241.598,“meter_v2”:241.662,“meter_v3”:241.073,“meter_w1”:3359.8,“meter_w2”:3353.76,“meter_w3”:3344.72}

I only want wto parts of the topic as separate sensors, namely “meter_kwh_imp” and “meter_kwh_exp”.

If I specify state_topic: “pixii/status/253101100376/meter_ext6/meter_kwh_imp” in the listener I get nothing.

Using my Configuration.yaml I get “Unknown” from these sensors:

mqtt:
  sensor:
  - name: "Battery_energy_in"
    unique_id: battery_energy_in
    state_topic: "pixii/status/253101100376/meter_ext6"
    unit_of_measurement: "kWh"
    device_class: energy
    name: Energy To Battery
    state_class: total_increasing
#
  - name: "Battery_energy_out"
    unique_id: battery_energy_out
    state_topic: "pixii/status/253101100376/meter_ext6"
    unit_of_measurement: "kWh"
    device_class: energy
    icon: mdi:lightning-bolt
    name: Energy From Battery
    state_class: total_increasing

Obviously I have misunderstood the whole Topic thing or don’t understand it at all, so PLEASE, PLEASE help me to correct my Configuration.Yaml

/Göran Andersson

2

https://community.home-assistant.io/t/how-to-help-us-help-you-or-how-to-ask-a-good-question/114371#oneone-format-it-properly-16

3 
mqtt:
  sensor:
  - name: "Battery_energy_in"
    unique_id: battery_energy_in
    state_topic: "pixii/status/253101100376/meter_ext6"
    unit_of_measurement: "kWh"
    device_class: energy
    name: Energy To Battery
    state_class: total_increasing
    value_template: "{{ value_json.meter_kwh_imp }}"

  - name: "Battery_energy_out"
    unique_id: battery_energy_out
    state_topic: "pixii/status/253101100376/meter_ext6"
    unit_of_measurement: "kWh"
    device_class: energy
    icon: mdi:lightning-bolt
    name: Energy From Battery
    state_class: total_increasing
    value_template: "{{ value_json.meter_kwh_exp }}"

You MQTT Sensor configurations required a value_template field.

4

I’m considering getting a Pixii battery. I see this post is about 1,5 years old. What’s your experience with it so far? Can it be controlled from HA (tell it when to charge or not, etc.), or is it just read-only?