homeassistant

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

i have a humidity sensor in the bathroom that turns the ceiling fan on, and the way that works is that it compares the bathroom humidity to humidity in other areas of the house, so it takes into account humid/dry days automatically

For me streaks are a double edged sword; if I break a streak then the stat becomes a disincentive

Why not try a challenge for how long you can go without a shower?

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

Maybe an option for every other day too

Or just trigger a machine which dispenses a treat whenever “wet” is detected

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!

weather has been all over the place lately

Air conditioning

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

if/when you can afford it, mmwave precense sensors are way better, mine can see me through the shower curtain standing still

Could make it more accurate by using a moisture sensor and placing the prongs in the shower.

Or better yet, plumb a flow rate meter into the supply pipe.

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

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

You didn't ask me, but as someone who has fiddled with these things my favorite sensor is the BME680, specifically the board that Adafruit sells. It costs more than other sensors, but that's because it's the best. It also does temperature, atmospheric pressure, and measures VOC. I think you can even use it to detect when someone takes a poo, but I haven't tried.

I connect mine to LOLIN D1 Minies running Tasmota.

Not everyone is the same.

I agree, my skin does too

I half agree with you. I shower daily but only use soap on my pits and bits. If I've done yardwork or exercise I'll hit everything with soap, though.