MQTT Publish Weather Minimum and Maximum Temperature

Configuration
,
1

Hi guys,

I want to send via mqtt.publish automation the minimum and maximum temperature for today, and week.

I tried using the code mentioned in the thread by @vingerha: Extracting values from weather.forecast_home

It does show the maximum but not the minimum temperature

The user @Troon said this no longer applies and I should open a new post

Here is my automation YAML code:

service: mqtt.publish
data:
  topic: homeassistant/sensor/IntelkaSW-8e8c-3/datetime
  payload: |-
    {
      "datetime": "{{ now().timestamp() | timestamp_custom("%Y-%d-%mT%H:%M:%S%z") }}",
      "weather": "{{ states('weather.forecast_home') }}",
      "temperature": "{{ state_attr('weather.forecast_home','temperature') }}",
      "humidity": "{{ state_attr('weather.forecast_home','humidity') }}",
      "max_temperature": "{{ state_attr('weather.forecast_home','forecast') | selectattr('datetime', 'search', now().timestamp() | timestamp_custom('%Y-%m-%d')) | map(attribute='temperature') | max }}",
      "min_temperature": "{{ state_attr('weather.forecast_home','forecast') | selectattr('datetime', 'search', now().timestamp() | timestamp_custom('%Y-%m-%d')) | map(attribute='temperature') | min }}"
    }

Output:

homeassistant/sensor/IntelkaSW-8e8c-3
{
  "datetime": "2024-26-11T10:50:00+0100",
  "weather": "rainy",
  "temperature": "7.9",
  "humidity": "77",
  "max_temperature": 8.3
  "min_temperature": 8.3
}

Please let me know why minimum is not working and what should I do to fix this in my automation YAML code.
Thanks and regards
Andree

2

I said that the old code in that thread no longer applies, as the method of getting forecast data has changed.

Please put this into Developer Tools / Template and paste the full result here:

{{ state_attr('weather.forecast_home','forecast') }}
3

Hi @Troon,

I updated my HomeAssistant to the latest version:

  • Core - 2024.11.3
  • Supervisor - 2024.11.4
  • Frontend - 20241106.2

This made my code not work at all now. (All information coming from forecast)

After that I went to Developer Tools and pasted the command you shared and got null

{{ state_attr('weather.forecast_home','forecast') }}

Result

Result type: dict

null

This template listens for the following state changed events:

  • Entity: weather.forecast_home

Thanks in advance and appreciate your help
Kindly, please advise.
Andree

4

Take a look at the first example here:

That should create a template sensor that contains the forecast data from your weather provider. You can then use that to work out the lowest temperatures.

5

Hi @Troon ,

I tried the code mentioned in the developer tools templates section, my entity is weather.forecast_home

Here the adjusted code:

template:
  - trigger:
      - trigger: time_pattern
        hours: /1
    action:
      - action: weather.get_forecasts
        data:
          type: hourly
        target:
          entity_id: weather.forecast_home
        response_variable: hourly
    sensor:
      - name: Temperature forecast next hour
        unique_id: temperature_forecast_next_hour
        state: "{{ hourly['weather.forecast_home'].forecast[0].temperature }}"
        unit_of_measurement: °C

but got as result:

UndefinedError: 'hourly' is undefined

Not sure if I’m creating the template in the correct place. What am I missing?

Kindly, please advise
Thanks and regards
Andree

6

You’re not. The template editor is merely for trying out Jinja templates.

This is YAML configuration and needs to be in configuration.yaml. I realise it starts with template: but this code is not a template in itself. Only the bit in {{...}} is a template.

Please add a couple of lines to it, so you get this at the end:

    sensor:
      - name: Temperature forecast next hour
        unique_id: temperature_forecast_next_hour
        state: "{{ hourly['weather.forecast_home'].forecast[0].temperature }}"
        unit_of_measurement: °C
        attributes:
          forecast: ""{{ hourly['weather.forecast_home'].forecast }}"

That way, the sensor will have the current temperature as its state, and the whole forecast in an attribute.

7

Hi @Troon ,

Okay, I moved this change to my configuration.yaml file and added the lines you mentioned at the bottom. Here’s the updated code snippet

template:
  - trigger:
      - trigger: time_pattern
        hours: /1
    action:
      - action: weather.get_forecasts
        data:
          type: hourly
        target:
          entity_id: weather.forecast_home
        response_variable: hourly
    sensor:
      - name: Temperature forecast next hour
        unique_id: temperature_forecast_next_hour
        state: "{{ hourly['weather.forecast_home'].forecast[0].temperature }}"
        unit_of_measurement: °C
        attributes:
          forecast: "{{ hourly['weather.forecast_home'].forecast }}"

I left it running for a couple of hours (since it runs once an hour) and when I looked at the Developer Tools → States → Entity : sensor.temperature_forecast_next_hour
The State shows as unknown and attributes as unit_of_measurement: °C friendly_name: Temperature forecast next hour

But cannot see any of the attributes for forecasts. Not sure what may be causing issues now.

Kindly, please advise
Thanks and regards
Andree

8

Do you have a weather provider set up on your system? This feels like you’re just guessing what to do without understanding what’s happening.

You must set up a weather integration first, which is what the action: is calling. Here are your options:

Then replace weather.forecast_home with the actual entity ID of your weather entity.