Wanting to simplify a template setting max numeric value for a variable

Configuration
1

I'm wondering if there is a way to simplify the template yaml below?
I have a pressure sensor in a water tank. It provides a voltage, sensor.tankd_adc, from which I calculate water depth (and from that, I calculate %full & volume).
This template works (it's in a template.yaml file) but is there a way to use iif?

   - sensor:
    - name: hTankD
      unit_of_measurement: "m"
      device_class: distance
      unique_id: 10240032
      state: >
        {% set Vi = states('sensor.tankd_adc') | float(default=0) %}
        {% if Vi > 5.81 %}
          {% set Vi = 5.81 %}
        {% endif %}
        {{ (Vi * 0.30981 + 0.06) | round(3) }}
2 
- sensor:
    - name: hTankD
      unit_of_measurement: "m"
      device_class: distance
      unique_id: 10240032
      state: >
        {% set Vi = [states('sensor.tankd_adc') | float(0), 5.81] | min %}
        {{ (Vi * 0.30981 + 0.06) | round(3) }}

If your sensor value is above 5.81 then the min (minimum) filter selects 5.81. If your sensor value is below 5.81 then the minimum filter selects that value.

3

Aaah, lovely. Thank you. Thought there must be something - very neat.

4

Even briefer, clipping the output of the calculation:

state: "{{ min(1.86, states('sensor.tankd_adc')|float(0)*0.30981+0.06)|round(3) }}"

1.86 is the result of the calculation with 5.81 as the input. That might be more readable for you in future if you recognise 1.86m as a physical tank dimension more than you recognise 5.81V as the ADC output.

1 Like
5

Thanks @Troon.

Interesting, not a structure I've seen before (although that's not saying much!). I would have been trying to put brackets around the whole line.