Trying to Fire Alert if Temp Sensor is out of a certain range

Configuration
1

I have a few temperature sensors that monitor our coolers. They need to be in a specific range.
In my configuration.yaml I added the following

homeassistant:
  customize:
    sensor.south_cooler_temperature:
      upper: 21
      lower: 6

My understanding is that if that sensor returns a value outside of the upper or lower range it will then fire an alert that I have configured in configurations.yaml like so:

alias: Temp out of range
variables:
  t_max: "{{ state_attr(trigger.entity_id, 'upper') }}"
  t_min: "{{ state_attr(trigger.entity_id, 'lower') }}"
  val: "{{ trigger.to_state.state | float(0) }}"
trigger:
  - platform: state
    entity_id:
      - sensor.south_cooler_temperature
condition:
  - condition: template
    value_template: "{{ not t_min < val < t_max }}"
action:
  - service: notify.gmailsmtp
    data:
      title: Temp out of Range
      message: Check the Temperature Sensors ASAP

Nothing seems to be firing at all. I know that my service notify.gmailsmtp works because I test it in the service gui and it sends and email fine.

I’ve been banging my head now for a couple days on this… help please :slight_smile:

2

What do the traces show?

Though it’s not one I would normally use, your trigger/variable/condition structure is working on my instance.

3

Why not just do this in an automation, at least that way you can easily trace what happens every time it fires (or if it fires at all)?

4

I actually did get it to fire again. I did some more searching and noticed that my filter state was set to off

image
image1079×150 25 KB

Switched it to on and it has been firing this afternoon.

Thank you

5

Could you point me in the right direction for this? What I’d really like to do is to have events fire for multple temperature sensors. I tried to go under settings, then Automations and Scenes, but I get an error 500 when I try and save.

6

I don’t know why you are getting error 500, it will generally tell you if your automation is invalid. You need a trigger, optional condition and action(s).

Your trigger would be when your sensor device changed value of any kind. The condition could be only if the value changed above or below a certain value. The action would be to send you the notification via Call Service and Notification.