Template variable error: 'state' is undefined when rendering

Installation Home Assistant OS
1

I have this error:

Template variable error: ‘state’ is undefined when rendering ‘{% if value_json is defined and value_json[‘buffered’] == “no” and value_json[‘device’] == “NMCTCB806Z” %} {{ value_json[‘values’][‘edischarge1_tot’] | int / 10 }} {% else %} {{ state.state }} {% endif %}’

This is the configuration.yaml section:

- name: Pietro - Discharged (Total)
  state_topic: energy/growatt
  value_template: >
    {% if value_json is defined and value_json['buffered'] == "no" and value_json['device'] == "NVCPB04031" %}
        {{ value_json['values']['edischarge1_tot'] | int / 10 }}
    {% else %}
       {{ state.state }}
    {% endif %}
  unique_id: pietro_discharged_total
  device_class: energy
  unit_of_measurement: "kWh"
  icon: mdi:solar-power
- name: Enrica - Discharged (Total)
  state_topic: energy/growatt
  value_template: >
    {% if value_json is defined and value_json['buffered'] == "no" and value_json['device'] == "NMCTCB806Z" %}
        {{ value_json['values']['edischarge1_tot'] | int / 10 }}
    {% else %}
        {{ state.state }}
    {% endif %}
  unique_id: enrica_discharged_total
  device_class: energy
  unit_of_measurement: "kWh"
  icon: mdi:solar-power

Why state.state is undefined?

2

What are you expecting state.state to be?

3

The concept is that the mqtt service gives me the values ​​of 2 different inverters with the same label. So I created 2 sensors that save the data if they have the right “device” value inside, otherwise the previous value must remain. State.state should theoretically return the value of before.

The sentors work correctly, but sometimes give this error and I don’t know why.

4 
{{ this.state }}

If that doesn’t work, then you can’t do what you want with that setup and you should move to template sensors with an MQTT trigger. Seems like that’s what you should be using anyways because your topic appears to be an event stream of information.

template:
- trigger:
  - platform: mqtt
    topic: energy/growatt
    variables:
      device_data: >
        {{ trigger.payload_json if trigger.payload_json is defined and trigger.payload_json.buffered == "no" else {} }}
      device: >
        {{ device_data.get('device') }}
  sensor:

  - unique_id: pietro_discharged_total
    name: Pietro - Discharged (Total)
    device_class: energy
    unit_of_measurement: "kWh"
    icon: mdi:solar-power
    state: >
      {% if device == "NVCPB04031" %}
        {{ device_data.values.edischarge1_tot / 10.0 }}
      {% else %}
       {{ this.state }}
      {% endif %}

  - name: Enrica - Discharged (Total)
    state: >
      {% if device == "NMCTCB806Z" %}
        {{ device_data.values.edischarge1_tot / 10.0 }}
      {% else %}
       {{ this.state }}
      {% endif %}
    unique_id: enrica_discharged_total
    device_class: energy
    unit_of_measurement: "kWh"
    icon: mdi:solar-power

EDIT: Just keep in mind that these will be unknown until they get the first piece of data. From that point forward they will always have data. Even after restart/reboot.

5

After you point it out to me it’s so obvious! :sweat_smile:
Thanks so much for the tip!
I’ve never seen the construct with the triggers you gave me! I will study it and then try to apply it.
However it also works as I did.

6

Yeah, I’m not sure if this is available in MQTT entities though, so you may get the same error. I know 100% that this is available in template entities.

7

I have tried and it works.
There are no more error logs. The sensors in question update every minute!

1 Like