cell Voltage/ Resistance

[Meli73]

Checklist

• I need support with using the integration.
• My issue is not a feature request
• I'm not avoiding to fill out the bug report form.

Describe the issue

I have a question to this Template od the Manual:

_template:

• sensor:
  • name: cell_voltage_0
    state: >-
    {{ state_attr('sensor.smartbat_...delta_voltage', 'cell_voltages')[0] }}
    unit_of_measurement: 'V'
    state_class: measurement
    device_class: voltage
    availability: >-
    {{ has_value('sensor.smartbat...delta_voltage') }}

is there a (Jinja) syntax doing a loop over all cell voltages ? (so I do not need to copy this block 48 times in my system )

And is the Cell resistance also avaliable? Or should I add a Feature request for it ?

[patman15]

Hi!

is there a (Jinja) syntax doing a loop over all cell voltages ?

Yes, have a look at line 17 of the example template in the template editor of the developer tools.

And is the Cell resistance also avaliable?

No, they are not available, they do not fit the current UI architecture and are specific to the JK BMS, so I'm quite hesitant to implement and maintain those. You can still look them up in the app by temporarily disabling the integration.

Best regards,
Patrick

[Meli73]

got it to this point:

`
template:
{% for cell_voltage in sensor.sp18b2311300049_delta_voltage -%}

• sensor:
  • name: cell_voltage_0
    state: >-
    {{ state_attr('sensor.sp18b2311300049_delta_voltage', 'cell_voltages')[0] }}
    unit_of_measurement: 'V'
    state_class: measurement
    device_class: voltage
    availability: >-
    {{ has_value('sensor.sp18b2311300049_delta_voltage') }}

{% endfor %}`

But how do I now replace the "0"'s in the loop body by some kind of index counter ?

[patman15]

If you install Mushroom you could use this:

Does that help? I do not think you can generate individual sensors automatically.

[Meli73]

Hi .. thanks. I'll have a look at this later this evening.

But anyway --
After a few nudges in the right direction, I at least got that far.

template: >
  {%- set ns = namespace(count = 0) -%}
  {%- for attr in states.sensor.sp18b2311300049_delta_voltage.attributes.cell_voltages %}
  - sensor:
    - name: cell_voltage_{{ ns.count }}
      state: >-
        {{ state_attr('sensor.sp18b2311300049_delta_voltage', 'cell_voltages')[ns.count] }}
      unit_of_measurement: 'V'
      state_class: measurement
      device_class: voltage
      availability: >- 
        {{ has_value('sensor.sp18b2311300049_delta_voltage') }}
  {% set ns.count = ns.count + 1 %}       
  {% endfor %}

and the output of it in the Template editor looks like this:

template: >

• sensor:

  • name: cell_voltage_0
    state: >-
    3.291
    unit_of_measurement: 'V'
    state_class: measurement
    device_class: voltage
    availability: >-
    True

• sensor:

  • name: cell_voltage_1
    state: >-
    3.292
    unit_of_measurement: 'V'
    state_class: measurement
    device_class: voltage
    availability: >-
    True
    .......
    "check Configuration" was green with this ...

But after restart HA is Got this Error MSG:
Logger: homeassistant.config
Source: config.py:357
First occurred: 10:56:47 PM (1 occurrences)
Last logged: 10:56:47 PM

Invalid config for 'template' at configuration.yaml, line 28: expected a dictionary '', got "\n{%- set ns = namespace(count = 0) -%} {%- for attr in states.sensor.sp18b2311300049_delta_voltage.attributes.cell_voltages %} - sensor:\n - name: cell_voltage_{{ ns.count }}\n state: >-\n {{ state_attr('sensor.sp18b2311300049_delta_voltage', 'cell_voltages')[ns.count] }}\n unit_of_measurement: 'V'\n state_class: measurement\n device_class: voltage\n availability: >- \n {{ has_value('sensor.sp18b2311300049_delta_voltage') }}\n{% set ns.count = ns.count + 1 %} ...

Does this mean what you meant with it is not possible to autogenerate Sensors in the for loop ?

[patman15]

Does this mean what you meant with it is not possible to autogenerate Sensors in the for loop ?

Correct, the loop does not work to generate configuration entries in the YAML file. The loop (template) only works within state: or availability:, thus you need to have it somewhere you can put templates. One option is the Mushroom template card as shown above. Depends on what you want to achieve ...

[Meli73]

The Mushroom Template I got Running also.

But I want also have access to this Values , for History plots and other Automations.

[Meli73]

template:  
{%- set ns = namespace(count = 0) -%}
{%- for attr in states.sensor.sp18b2311300049_delta_voltage.attributes.cell_voltages %}
  - sensor:
    - name: cell_voltage_{{ ns.count }}
      state: >-
        {% raw %}{{ state_attr('sensor.sp18b2311300049_delta_voltage', 'cell_voltages')[{% endraw %}{{ns.count}}{% raw %}] }}{% endraw %}
      unit_of_measurement: 'V'
      state_class: measurement
      device_class: voltage
      availability: >- 
        {% raw %}{{ has_value('sensor.sp18b2311300049_delta_voltage') }}{% endraw %}
{% set ns.count = ns.count + 1 %}       
{% endfor %}

modding the code with some "raw" lines I could at least use this script in the template Editor to generate the inlined Template code automatically ;-)

template:
  - sensor:
    - name: cell_voltage_0
      state: >-
        {{ state_attr('sensor.sp18b2311300049_delta_voltage', 'cell_voltages')[0] }}
      unit_of_measurement: 'V'
      state_class: measurement
      device_class: voltage
      availability: >- 
        {{ has_value('sensor.sp18b2311300049_delta_voltage') }}
       

  - sensor:
    - name: cell_voltage_1
      state: >-
        {{ state_attr('sensor.sp18b2311300049_delta_voltage', 'cell_voltages')[1] }}
      unit_of_measurement: 'V'
      state_class: measurement
      device_class: voltage
      availability: >- 
        {{ has_value('sensor.sp18b2311300049_delta_voltage') }}

But is it possible to "group" this sensors now into a Device ?

[patman15]

Clever idea. 😃
Just have a look at the HA community, for example this post. Also, did you check out https://github.com/gjohansson-ST/attribute_as_sensor ?
Best regards,
Patrick