[Automation] Shower detection: trigger when humidity increases in 10 minutes?

Configuration
18

To throw another way to accomplish this out there. I use the Average Sensor (available via HACS [also here: GitHub - Limych/ha-average: Average Sensor for Home Assistant]).

- platform: average
  name: Master Bathroom Humidity Average
  duration:
    days: 1
  entities:
    - sensor.master_bathroom_sensor_relative_humidity_measurement

I then created an input_number which saves a threshold. This is used so I can easily update this threshold without having to restart HA.

master_bath_humidity_threshold:
  name: Master Bath Humidity Threshold
  min: 0
  max: 20
  initial: 9
  mode: box
  step: 1

I use a binary_sensor to check if the current humidity minus the average humidity is greater than the input_number threshold.

    master_bath_fan_sb:
      friendly_name: Master Fan S/B Status
      value_template: "{{ (states('sensor.master_bathroom_sensor_relative_humidity_measurement')|int - states('sensor.master_bathroom_humidity_average')|int) > states('input_number.master_bath_humidity_threshold')|int }}"

This automation then works to turn the fan on/off based on the value of the binary_sensor changing.

- id: '1555779101294'
  alias: Master Bath Fan - TOGGLE
  trigger:
  - entity_id: binary_sensor.master_bath_fan_sb
    for: 00:00:30
    platform: state
  condition: []
  action:
  - data:
      entity_id: switch.master_bath_fan
    service_template: switch.turn_{{trigger.to_state.state}}

Really all you need is the average sensor and the automation - I just use the input_number to allow me to change the ‘test’ without restarting / editing the automation. Same with the binary_sensor - this could be done in the automation itself with a trigger template and/or by breaking into two automations. Anyhow, more than one way to skin a cat, as always, with HA.

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