Calculated temperature sensor

Configuration
1

Hello,

I want to setup a “virtual” sensor that is the difference between two measured temperatures that I would use for controlling a circulation pump in my heating system.

What I would like to do is ad sensor A that presents a temperature that is sensor X – sensor Y as an example.

Believe it or not I have tried to search for an answer but haven’t been able to find it.

Could someone point me in the right direction?

Kind regards,

Fredrik Mörner

2

Template Sensor, there is even an easily adoptable example on the page.

3

here

- platform: template
  sensors:
    lounge_factor:
      friendly_name: Lounge Factor
      value_template: >-
        {%set temp_indoor = states.sensor.bt_lounge_temperature.state | float %}
        {%set temp_fan = state_attr("climate.lounge_fan","temperature") %}
        {% set  factor = (temp_indoor - temp_fan) | int %}
        {% if ((factor ) <= 0) %}
        0
        {% else %}
        {{factor }}
        {% endif %}

think of like this
{% = want to do some logic testing or some maths %}

{{ print the outcome}}

I use the above sensor

- id: b12c44a8-d707-4892-9f75-c84c6927dab4
  alias: Lounge Fan Control
  initial_state: true
  trigger:
    - entity_id: sensor.lounge_fact
      platform: state
  action:
    - data_template:
        entity_id: script.lounge_fan_{{ trigger.to_state.state }} #< run script base on temp diff
      service: script.turn_on

then I have these scripts

lounge_fan_3:
  alias: lounge fan Speed 3
  sequence:
    - service: mqtt.publish
      data:
        topic: cmnd/RF_Bridge_raw/Backlog
        payload:
          RFRAW AA B0 1E 03 08 017C 02E4 2620 28090909181818180909090909090909180909090909
          55 RFRAW 0
    - service: mqtt.publish
      data:
        topic: home/lounge-fan
        payload: "3"
    - service: mqtt.publish
      data:
        topic: home/lounge/fan/cmnd/FanSpeed
        payload: "on"
  mode: single
lounge_fan_2:
  alias: lounge fan Speed 2
  sequence:
    - service: mqtt.publish
      data:
        topic: cmnd/RF_Bridge_raw/Backlog
        payload:
          RFRAW AA B0 1E 03 08 0172 02E4 2620 28090909181818180909090909090918090909090918
          55 RFRAW 0
    - service: mqtt.publish
      data:
        topic: home/lounge-fan
        payload: "2"
    - service: mqtt.publish
      data:
        topic: home/lounge/fan/cmnd/FanSpeed
        payload: "on"
  mode: single
lounge_fan_1:
  alias: lounge fan Speed 1
  sequence:
    - service: mqtt.publish
      data:
        topic: cmnd/RF_Bridge_raw/Backlog
        payload:
          RFRAW AA B0 1E 03 08 0172 02E4 2620 28090909181818180909090909090918180909091809
          55 RFRAW 0
    - service: mqtt.publish
      data:
        topic: home/lounge-fan
        payload: "1"
    - service: mqtt.publish
      data:
        topic: home/lounge/fan/cmnd/FanSpeed
        payload: "on"
  mode: single
lounge_fan_0:
  alias: lounge fan Speed 0
  sequence:
    - service: mqtt.publish
      data:
        topic: cmnd/RF_Bridge_raw/Backlog
        payload:
          RFRAW AA B0 1E 03 08 017C 02E4 2620 28090909181818180909090909090909090918181818
          55 RFRAW 0
    - service: mqtt.publish
      data:
        topic: home/lounge-fan
        payload: "0"
    - service: mqtt.publish
      data:
        topic: home/lounge/fan/cmnd/FanSpeed
        payload: "off"
  mode: single
4

Thanks and a happy new year!

1 Like