I just got tested myself so I might be in the same boat! Waiting to get the results

Here is my Automation:

alias: Update Last Shower Time
description: ""
triggers:
  - entity_id: binary_sensor.showering
    from: "on"
    to: "off"
    trigger: state
actions:
  - data:
      datetime: "{{ now() }}"
    action: input_datetime.set_datetime
    target:
      entity_id: input_datetime.last_shower

You need to create a ‘DateTime’ helper called “Last Shower” This is where the last shower time will be stored (and can be changed)

You need a ‘Statistics’ Helper too. Call it “Average Bathroom Humidity” and base it on whatever humidity sensor you have. Make it “average linear” then set Max Age to 1 hour. (leave other options default)

Make these template sensors too:

Template Binary Sensor called “Showering”:

{{ (states('sensor.bathroom_sensor_humidity')|float - states('sensor.average_bathroom_humidity')|float) > 9 }}

Template Sensor called “Time Since Last Shower”:

% set diff = now() - as_datetime(states('input_datetime.last_shower')).astimezone() %}
{% set days = diff.days %}
{% set hours = (diff.seconds // 3600) %}
{% if days > 0 %}
  {{ days }} day{{ 's' if days > 1 }} {{ hours }} hour{{ 's' if hours != 1 }}
{% else %}
  {{ hours }} hour{{ 's' if hours != 1 }}
{% endif %}

Let me know if you hit any snags!

I already felt this urge to get the “high score” LOL

thats the goal! It’s a glass door though, does that matter?

I’m about to go into my attic and find out!

i dont have a way to see if the fan is on currently. but it gets around natural humidity swings by comparing it to the 1hour average.
that means if it creeps up to 70% humidity, it wont think im in the shower until it hits 78%. It has to be a sudden change because of this logic

pro tip for texas summers: dont go outside :)

weather has been all over the place lately

I’d like to do the same eventually. I rent though so it would have to be reversible

I agree, my skin does too

Good idea! I aim for 2 days. My skin and hair hate Texas water

I might look into that if this ends up giving false positives or something. So far it’s working great

I do the ability to manually change the date and time of last shower. I had to do that when tweaking the sensitivity

Also! I was able to use this to make my PIR sensor presence detection more accurate

before it would not see me in my shower and think im not there. Now that automation only triggers if the bathroom is also ‘dry’

just the DHT-22 running on a Wemos D1.
I set it up using ESPhome

I just revisited ESP home after years and it is so damn good now. I can’t believe I can just flash the boards wirelessly directly from home assistant

I have done exactly this. “If past midnight and phone charge type is wireless, turn off all lights”

It was pretty much instant

It never ends man 😂. Been using it almost a decade and I keep finding stuff

As much as I know zigbee is the way, and even have it set up for my thermostat, I cant bring myself to pay $20 a bulb

$2.50 Tuya bulbs are doing the job just fine honestly. Ran locally of course

If I were the type to take care of my mental health I would have years ago too. But I’m glad I didn’t, recently tried again to make them local and its SO much easier these days. Use “Tuya Local”, not “Local Tuya”

Try “Tuya Local” instead. I found it WAY easier to use. No copying keys, it gets them for you