How to use greater than / less than properly in a trigger value template

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2

You’ve just got a couple little issues…

  1. There is no reason to use an if statement for your examples.
  2. The function is states() not state()
  3. You need to provide a default value for many filters, including float.
trigger:
  - platform: template
    value_template: >-
      {{ states('sensor.main_bathroom_humidity') | float(0) > 55 }}
    id: Above 55% Humidity
  - platform: template
    value_template: >-
      {{ states('sensor.main_bathroom_humidity') | float(0) < 55 }}
    id: Below 55% Humidity

However, it’s not really necessary to use template triggers here, since the basic Numeric state trigger will work fine… And that will also allow you to easily add a for variable so your fan doesn’t bounce on and off if the humidity is hovering around your setpoint.

trigger:
  - platform: numeric_state
    entity_id: sensor.main_bathroom_humidity
    above: 55
    id: 'on'
    for: "00:01:00"
  - platform: numeric_state
    entity_id: sensor.main_bathroom_humidity
    below: 55
    id: 'off'
    for: "00:01:00"
condition: []
action:
  - service: switch.turn_{{ trigger.id }}
    target:
      entity_id: switch.main_bathroom_fan
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