Notify temperature

Configuration
1

I am trying to work out how to make a notification of overnight temp.

The simple description is at the end I would like a notification on app at a time in the morning that is:

“overnight* the temp was xc,at HH:mm, it is currently yc”

I have a max min sensor from the original temperature - but what next ? I can find lots of ways to get info “now” but nothing to look back at what it was, and pick that one bit of data.

Thanks

*defined time rather than sun.sun

2

This is not exactly what I think you are trying to accomplish, but I use the automations shown below to monitor if the temperatures in a fridge/freezer I have stays above a given temperature of a given period of time. If so I get a notification. I think you might be able to create an ‘average’ sensor for last say 12 hours and incorporate that into your solution, I am using this custom sensor with good results:

:

  - alias: 'High freezer temperature'
    trigger:
    - platform: numeric_state
      entity_id: sensor.freezer_govee_temperature
      above: 25
      for:
        minutes: 30
    action:
      service: notify.pushover
      data:
        message: 'Freezer temperature has been above 25ºF for 30 minutes'
        data:
          priority: 1
          sound: gamelan
  - alias: 'High refrigerator temperature'
    trigger:
    - platform: numeric_state
      entity_id: sensor.refrigerator_govee_temperature
      above: 50
      for:
        minutes: 30
    action:
      service: notify.pushover
      data:
        message: 'Refrigerator temperature has been above 50ºF for 30 minutes'
        data:
          priority: 1
          sound: gamelan
1 Like
3

Exactly this^^^^^ I use that to give me the minimum/maximum temp since midnight but you can exactly specify the hours. It works really well.

4

That sounds pretty good.

I think I may have a play with, I was looking to avoid averages right now as looking at the last few days its been still quite warm over night until the last few hours where its really dropped. Hence wanting to know specific time also, if it was -1 over night but +2 now its at least going to be easier to get the ice off the car.

5

try this as a template sensor:

- platform: template
  sensors:
    lowest_temp:
      friendly_name: "Lowest temp at time"
      value_template: >
        {% set time = states('sensor.time') %}
        {% if states('sensor.time') == "00:01" %}
          1000.0@00:00
        {% else %}
          {% if states('sensor.dark_sky_temperature') | float < states('sensor.lowest_temp').split('@')[0] | float %}
            {{ states('sensor.dark_sky_temperature') | float }}@{{ time }}
          {% else %}
            {{states('sensor.lowest_temp') }}
          {% endif %}
        {% endif %}

you’ll have to set up the sensor.time first.

then put in your own temperature entity you are trying to track.

It should only update the sensor if the temp is lower than the last temp reading in the sensor.

And it will reset the temp every day at one minute after midnight to a ridiculously high number so it’s obvious that it hasn’t tracked anything yet. You can set that to any time you want along with whatever default starting temp you want. But as soon as the temp is less than 1000 degrees :wink: it will update the temp and time.

the only downside I see is I’m not sure that the sensor will maintain it’s state thru restarts. But I think it should.

6

I got a solution elsewhere that “seems” to be working - I am sure there is a cleaner way. I think i was stuck on the idea of being able to pick a time span over a recent past time

  - platform: min_max
    type: min
    name: maxmin lowest temp
    entity_ids: sensor.temperature_2

  - platform: statistics
    name: maxmin lowest temp time of maxmin ofter 600min
    entity_id: sensor.maxmin_lowest_temp
    max_age:
      minutes: 600

then for my notify

message: >-
  Overnight the temperature was {{
  state_attr('sensor.maxmin_lowest_temp_time_of_maxmin_ofter_600min',
  'min_value') }}c it is currently {{ states('sensor.temperature_2') }}c
7

If you use the custom average component that is exactly what you can do