Calculate droven kilometre since last charge

Configuration
1

Hey,

as the subject already clearly describes are im trying to calculate the value how much kilometers i drove since the last charge.

sensor:
  - platform: template
    sensors:
      calculated_mileage:
        friendly_name: "Berechnete Kilometerzahl"
        unit_of_measurement: "km"
        value_template: >-
          {% set charging_state = states('sensor.id_4_pro_performance_150_kw_204_ps_charging_state') %} 
          {% set odometer = states('sensor.id_4_pro_performance_150_kw_204_ps_odometer') | int %}


          {%if is_state('sensor.id_4_pro_performance_150_kw_204_ps_charging_state', "charging") -%}
          {%set mileage = 0 %}
          {% set last_charging_odometer = odometer %}
          {{last_charging_odometer}}
          {% else %}
          {% set mileage = odometer - last_charging_odometer | default(0)  %}
          {%- endif %}


          {{mileage | default(0)}}

I’m really struggling with it. Every time I try to manually set the value of sensor.id_4_pro_performance_150_kw_204_ps_odometer to the value it had when I charged it, and also set sensor.id_4_pro_performance_150_kw_204_ps_charging_state to “charging,” I still get the value that is behind sensor.id_4_pro_performance_150_kw_204_ps_odometer instead of the calculated one from the “else” section.

Does someone has an idea what im doing wrong?

Greetings

Dany

2

Simply by looking I can’t find the error but have you tried the value template code in the developer tools?
It could help to debug

3

Dear @zioCristia,

thanks for your reply, i tried it as you suggested, but without any outcome:
ezgif-4-1a8f627ac9

It seems that the variable last_charging_odometer is missing whenever it comes to the else section.

Have you based on that Video any idea?

4

You’re defining last_charging_odometer in the if, so you can’t access it in the else. Move it out or just use odometer (but then your results will be 0).

I think what you need to do instead is to make an input_number helper to store the current odometer when it starts to charge, after calculating the previous delta (mileage) using the helper’s value and odometer.

5

Nice it works.

Here is my input_number configuration:

input_number:
  last_charging_odometer:
    name: Letzter Kilometerstand beim Laden
    min: 0
    max: 99999
    step: 1
    mode: box
    unit_of_measurement: km

and here my sensor:

sensor:

  - platform: template

    sensors:

      calculated_kilometre:

        friendly_name: "Berechnete Kilometerzahl"

        unit_of_measurement: "km"

        value_template: "{{ states('sensor.id_4_pro_performance_150_kw_204_ps_odometer') | int - states('input_number.last_charging_odometer') | int }}"

One question, is there any possibility to clean up the historic values of my new input_number helper?
I have from the testings many wrong ones.

1 Like
6

You can just wait for your DB to purge data according to your recorder’s purge settings, otherwise you’ll need to delete it manually from the DB.

7

Now that I look at my answer again: One can now call recorder.purge_entities service from the dev tab too.