How to set thermostat temp based on mutliple temps and times?

Configuration
1

I want to warm up a cold room. The colder the room is, the longer it will take to warm up.

I basically want the target temp to be 70F by 5:30pm. So I’m thinking something like:

If day is mon tue wed thu sat sun (so not friday)

If time is 2pm and temp < 45 then set temp to 69
if time is 3pm and temp < 55 then set temp to 69
if time is 4pm and temp < 65 then set temp to 69

What’s the best way to go about that?

Thank you!

2

There are a bunch of ways to do it, the “best way” for any user is one they understand.

Here’s are two approaches (click the arrows to see each configuration):

A single Time trigger with three times and the weekdays. Using And conditions within an Or condition to pair Time and Temperature requirements. 
triggers:
  - trigger: time
    at: 
      - "14:00:00"
      - "15:00:00"
      - "16:00:00"
    weekday: 
      - "mon"
      - "tue"
      - "wed"
      - "thu"
      - "sat"
      - "sun"
conditions:
  - or:
    - and:
        - condition: time
          before: "14:01:00"
        - condition: numeric_state
          entity_id: sensor.YOUR_TEMP
          below:  45
    - and:
        - condition: time
          before: "15:01:00"
          after: "14:59:00"
        - condition: numeric_state
          entity_id: sensor.YOUR_TEMP
          below:  55
    - and:
        - condition: time
          before: "16:01:00"
          after: "15:59:00"
        - condition: numeric_state
          entity_id: sensor.YOUR_TEMP
          below:  65
actions:
  - action: climate.set_temperature
    target:
      entity_id: climate.YOUR_THERMOSTAT
    data:
      temperature: 69
      hvac_mode: heat

Note: If you are using the current temperature attribute from your thermostat instead of a sensor entity, the conditions will need to be modified as follows:

        - condition: numeric_state
          entity_id: climate.YOUR_THERMOSTAT
          attribute: current_temperature
          below:  65

Multiple Time triggers. Pair time and temperature requirements by assigning the temperature value to a variable for each trigger. Then using conditions to check weekday and compare variable value to sensor state. 
triggers:
  - trigger: time
    at: "14:00:00"
    variables:
      temp: 45
  - trigger: time
    at: "15:00:00"
    variables:
      temp: 55
  - trigger: time
    at: "16:00:00"
    variables:
      temp: 65
conditions:
  - not:
      - condition: time
        weekday: "fri"
  - condition: template
    value_template: "{{ states('sensor.YOUR_TEMP')|float(0) < temp }}"
actions:
  - action: climate.set_temperature
    target:
      entity_id: climate.YOUR_THERMOSTAT
    data:
      temperature: 69
      hvac_mode: heat

Note: If you are using the current temperature attribute from your thermostat instead of a sensor entity, the template for the condition will be:

{{ state_attr('climate.YOUR_THERMOSTAT', 'current_temperature' ) < temp }}

1 Like
3

Use the generic thermostat integration and set the preset temps. Then use a time trigger to switch between presets. This will also allow a manual overide if needed.

4

OP seems to already have a thermostat…

5

Thank you, I will study those and try them.

6

So this is the yaml I’m attempting to use, the problem is, at 2pm it’s setting the temperature to 69, even if the current temperature is above 45.

alias: Sunroom Temperature
description: ""
triggers:
  - trigger: time
    at: "14:00:00"
    variables:
      temp: 45
  - trigger: time
    at: "15:00:00"
    variables:
      temp: 55
  - trigger: time
    at: "16:30:00"
    variables:
      temp: 65
conditions:
  - not:
      - condition: time
        weekday: fri
  - condition: template
    value_template: >-
      {{ state_attr('sensor.sunroom_thermostat_temperature',
      'current_temperature' ) | float(0) < temp }}
actions:
  - action: climate.set_temperature
    target:
      device_id: 56e0b45d492df3a7fadd22dcfb62151d
    data:
      temperature: 69
      hvac_mode: heat

The problem is, at 2pm the action is triggered regardless of the current temperature. I ran the yaml through claude AI and it said:

There’s a bug in your automation — the variables defined under each trigger are not accessible in the conditions block. Trigger variables are only available within trigger-scoped contexts, not in conditions. Here’s the corrected version using a trigger.id pattern with a variables action block instead:
claude is suggesting:

> alias: Sunroom Temperature
> description: ""
> triggers:
>   - trigger: time
>     at: "14:00:00"
>     id: "1400"
>   - trigger: time
>     at: "15:00:00"
>     id: "1500"
>   - trigger: time
>     at: "16:30:00"
>     id: "1630"
> variables:
>   temp_threshold: >-
>     {% if trigger.id == '1400' %} 45
>     {% elif trigger.id == '1500' %} 55
>     {% elif trigger.id == '1630' %} 65
>     {% else %} 999
>     {% endif %}
> conditions:
>   - not:
>       - condition: time
>         weekday: fri
>   - condition: template
>     value_template: >-
>       {{ state_attr('sensor.sunroom_thermostat_temperature',
>       'current_temperature') | float(0) < temp_threshold | float(999) }}
> actions:
>   - action: climate.set_temperature
>     target:
>       device_id: 56e0b45d492df3a7fadd22dcfb62151d
>     data:
>       temperature: 69
>       hvac_mode: heat

Thoughts?

7

I would just use a “temperature ramp”

Meaning that I ramp up the temperature over time. I don’t think there is an issue turning on the heating early, if the target temperature is below the current room temperature (it won’t do anything).

You can use a variable block to calculate a target based on the time of day:

variables:
  now_ts: "{{ now().timestamp() }}"
  start_ts: "{{ today_at('14:00').timestamp() }}"
  end_ts: "{{ today_at('17:30').timestamp() }}"
  start_temp: 45.0
  end_temp: 70.0
  progress: "{{ (now_ts - start_ts) / (end_ts - start_ts) }}"
  target_temp: "{{ (start_temp + (progress * (end_temp - start_temp))) | round(0) }}"

Then we can trigger the automation every 15 minutes:

trigger:
  - platform: time_pattern
    minutes: "/15"

Only execute the automation in the desired window:

condition:
  - condition: template
    value_template: >
      {{ start_ts <= now_ts <= end_ts }}

And set the thermostat to the target temp:

actions:
  - action: climate.set_temperature
    target:
      device_id: 56e0b45d492df3a7fadd22dcfb62151d
    data:
      temperature: "{{ target_temp }}"
      hvac_mode: heat

You will probably need a few more conditions to hande:

  • Day of the week.
  • What to do if the heating is already on when the automation start.
  • … Anything else …

But that’s the basics.