Automation trigger below template

Configuration
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1

Hello guys,

I’m trying to get my phone battery to last a bit longer, so I created an automation that automatically turns my charger off when it reaches the required battery percentage.

Now I also want to create a trigger that turns the charger on when my battery percentage dips below the required percentage - 10%. What am I doing wrong?

trigger:
  - platform: numeric_state
    entity_id: sensor.phone_battery_level
    above: input_number.phone_requested_battery_level

  - platform: template
    value_template: >-
      {% if ( states( 'sensor.phone_battery_level' ) | float) < ( states(
      'input_number.phone_requested_battery_level' )  - 10| float ) %}true {% endif
      %}

The first trigger is working as expected, the second template trigger is not triggering.

2

You have your float filter in the wrong place and the less than comparison will output true/false for you. Also it is best practice to supply defaults for your filters.

  - platform: template
    value_template: >
      {{ states('sensor.phone_battery_level') | float(0) < ( states('input_number.phone_requested_battery_level') | float(0) - 10 ) }}
3

Thanks, this was indeed the issue. Still getting used to templating, what does the 0 parameter in the float filter refer to?