Generic Hygrostat for Home Assistant

Due to the fact that humidity levels are different during the summer and winter, a static humidity level switching the fan is on/off is not possible. This binary_sensor detects high rises in humidity and switches on. And switches off when the humidity is back to normal.

Inspired by: https://www.domoticz.com/wiki/Humidity_control

Setup

In your configuration.yaml you'll need:

binary_sensor:
- platform: generic_hygrostat
  name: Bathroom Hygrostat
  sensor: sensor.bathroom_climate_humidity # Source humidity sensor
  attribute: humidity # Optional use sensor attribute instead of state.
  delta_trigger: 3 # Optional humidity swing to detect. Default = 3
  target_offset: 3 # Optional dehumidification target offset. Default = 3
  min_on_time: 300 # Optional min on time in seconds. Default = 0 seconds
  max_on_time: 7200 # Optional safety max on time in seconds. Default = 7200 seconds
  sample_interval: 300 # Optional time between taking humidity samples in seconds, default 300 seconds
  min_humidity: 30 # Optional minimum humidity to enable dehumidification. Default = 0
  unique_id: bathroom_hygrostat # Optional ID that uniquely identifies this sensor. Set this to a unique value to allow customization through the UI.

It will create a binary sensor called binary_sensor.bathroom_hygrostat. Next, add some automations to switch your fan:

automation:
- alias: Bathroom Hygrostat On
  trigger:
    platform: state
    entity_id: binary_sensor.bathroom_hygrostat
    to: 'on'
  action:
    - service: switch.turn_on
      entity_id: switch.fan

- alias: Bathroom Hygrostat Off
  trigger:
    platform: state
    entity_id: binary_sensor.bathroom_hygrostat
    to: 'off'
  action:
    - service: switch.turn_off
      entity_id: switch.fan

Installation

HACS

1. In HACS Store, search for [basschipper/homeassistant-generic-hygrostat]
2. Install the custom integration
3. Setup the generic hygrostat custom integration as described above

Manual

1. Clone this repo
2. Copy the custom_components/generic_hygrostat folder into your HA's custom_components folder
3. Setup the generic hygrostat custom integration as described above