🚿 Bathroom Humidity Exhaust Fan

ended up using the script! this works, thanks

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@fransiefrans

Thanks for letting us know… glad you are up and running :partying_face:

Enjoy

Blacky

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@Townsmcp

This :toilet: Toilet Exhaust Fan with time delay blueprint has now been updated so it will work with this blueprint now. Just need to create a toggle helper and enter it into both blueprints. More information can be found in its thread Click Here.

Blacky :smiley:

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Very interested in trying this, do you think it would work using the Sonoff Humidity sensor instead of the one you listed?

@ice3m

You can use other humidity sensor and you don’t have to use the one I use but it must report at least every 60 seconds or on every state change.

I did a quick google search and still not sure what your sensor does. Your humidity sensor must report a value at least every 60 seconds. Some battery sensors report on every change and I think your one reports on 5% of change even when they say it report every 5 seconds. If it is 5% change then no it will not work. The best way it to see what your sensor reports.

i use the aqara Humidity Sensor works great.

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I am stumped at selecting the Fan switch

I cannot select it (a Sonoff ZBMINI relay) which works via the Dashboard:

I have scrolled through all the dropdown for device and entity and tried typing Fan, MINI, Bathroom

Screenshot 2023-10-11 115913

Replying to my own question LOL

I went and checked the entity for the switch and then copied and pasted - seemed to accept it

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@Blacky can I also use the derivative of an absolute humidity sensor? Currently the “rising” and “falling” has the % unit of measurement. If I use absolute humidity, the value will be a change of 200 mg/m3/minute or so, instead of 5%/minute.

Why absolute humidity? Value change is “sharper”; relative humidity value is damp(en)ed due to temperature rise that comes with it when taking a shower. A 5% relative humidity increase combined with a 2 degreeC increase is a 24% increase of absolute humidity (50% to 55%, 20 to 22 degC). See Absolute Humidity Calculator

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@Blacky I am testing your blueprint out, and I have a manual binary switch setup in ESPhome called “binary_sensor.bath_sense_fan_10” The setup looks like:

binary_sensor:
  - platform: gpio
    pin: D0
    name: ${display_name} Motion
    device_class: motion
  - platform: gpio
    pin:
      number: D3
      inverted: true
      mode:
        input: true
        pullup: true  
    name: ${display_name} "Fan 10"
    filters:
      - delayed_off: 250ms
    on_press:
  # Simple
      - homeassistant.event:
          event: esphome.button_pressed
          data:
            title: Fan button was pressed 

I tried and pressed the temperature-open push button, but the fan did not turn on. Do I need to make the filter delayed_off longer than 250ms?
And do I insert a motion sensor somewhere in the blueprint? I do have a binary sensor in helper to bypass the motion sensor, setup I have is in node-red. In node-red I have disabled my fan on and off nodes.

I think I have to change the ESPhome to toggle switch, and not nomally open. It is a physical nomally open push button.

wonderful blueprint BTW!

@balk77

Give it a try and see what happens. There are many reasons why we use a Derivative Sensor and to date it just works.

@fixxser

You are close but missing some things. Below is your code and some notes in the code.

# Enter this switch into the automation (manual fan switch) and into a HA dashboard if you like.
switch:
  - platform: gpio
    pin: GPIO19 # Set any spare pin you like it will do nothing
    id: bathroom_manual_control # This ID is the link to the binary sensor
    name: "Bathroom Fan - Manual Control" # Call it whatever you like
    icon: "mdi:fan-clock"


binary_sensor:
  - platform: gpio
    pin: D0
    name: ${display_name} Motion
    device_class: motion
  - platform: gpio
    pin:
      number: D3 # Wire from this pin to the push button on the wall and back to ground on esp32
      inverted: true
      mode:
        input: true
        pullup: true  
    name: ${display_name} "Fan 10"
    on_press:
      then:
        - switch.toggle: 
            id: bathroom_manual_control # This is the link back to the switch ID above.
    filters:
      - delayed_on: 10ms # This is for the bounce in the push button, keeps things happy ;) 

In automation

This is it in a HA dashboard.

19

Hope this helps you

Blacky :smiley:

too bad, does not work:

Message malformed: A value can never be above 200.0 and below 100.0 at the same time. You probably want two different triggers.

@balk77

O well, try just using the Derivative Sensor, my understanding it is working for you. I will keep this in mind and put it on my list.

Blacky :smiley:

Post withdrawn

Here is a strange request. I live in Houston which can have a very humid climate. Is there a way to add a bit of logic so that if the humidity after the shower is less than the humidity outdoors, it will not run ? There is no point in exhausting the humidity if it will only get replaced by maybe even more humid air…

I have just been thinking about this since I put in a bathroom fan with a built in humidity sensor years ago, but it has a very short discharge hose that goes only about 1 or 2 feet. I think that the fan senses the outside humidity and just runs for hours. I’d like to prevent this.

@merkurmaniac

Hi Richard,

This is interesting… I would think that is shouldn’t run if set up correctly.

You have a safe guard to stop this but maybe have a look at my set up as it just may help you. If you do have any further questions then please ask. To see my set up Click Here

Blacky :smiley:

Yes, my bathroom sensor is just above my shower tile, 3’ down from the ceiling and the bathroom fan. I have installed your blueprint and it worked great at detecting my shower. I have not wired the fan, so I have it flipping an input boolean called wet shower.

I am also going to use it to run a towel warmer that I am buying. I can probably set it up using the light function that you have in your blueprint, I may run it for one hour to dry the towels after the shower. What do you think would be the best way to add a timer based towel heater ?

Hi Richard

Nice one :+1:

It will only control a light domain. If you are not using the automation link then that has a time delay.

@merkurmaniac

You could also use this blueprint and use the fan as the trigger :stopwatch: Timer Relay - Run ON Timer .