z2m_aqara_trv_external_temperature.yaml

z2m_aqara_trv_external_temperature.yaml

blueprint:
  name: Aqara TRV E1 External Temperature Control
  description: >
    This automation allows the Aqara TRV E1 Smart Radiator Thermostat to use temperature readings from an external sensor rather than its internal sensor. Whenever the temperature sensor reports a new value, it is sent to the TRV for more accurate climate control.
  domain: automation
  source_url: "https://gist.github.com/pavax/8d6ed250765d89cb281d4a1762b8d2e8"

  input:
    external_temp_sensor:
      name: External Temperature Sensor
      description: Select the temperature sensor that will provide temperature readings to the Aqara TRV.
      selector:
        entity:
          filter:
            domain: sensor
            device_class:
              - temperature

    aqara_trv_device:
      name: Aqara TRV Device
      description: Select the Aqara Smart Radiator Thermostat E1 that will receive the external temperature data.
      selector:
        device:
          multiple: false
          filter:
            - integration: mqtt
              manufacturer: Aqara
              model: Smart radiator thermostat E1 (SRTS-A01)
            - integration: mqtt
              manufacturer: Aqara
              model: Smart radiator thermostat E1
            - integration: mqtt
              manufacturer: Aqara
              model: Aqara Smart Radiator thermostat E1 (SRTS-A01)
            - integration: mqtt
              manufacturer: Aqara
              model: Aqara smart radiator thermostat E1 (SRTS-A01)

    external_temperature_input_name:
      name: TRV's Input Sensor Name
      description: Enter a keyword or name used to identify the TRV’s number sensor entity-id, which sets the external temperature value. Defaults to 'external'.
      selector:
        text:
      default: "external"

mode: single
max_exceeded: silent

variables:
  aqara_trv_device: !input aqara_trv_device
  external_temp_sensor: !input external_temp_sensor
  external_temperature_input_name: !input external_temperature_input_name

trigger:
  - trigger: state
    entity_id: !input external_temp_sensor

action:
  - variables:
      aqara_trv_device_name: "{{ device_attr(aqara_trv_device, 'name') }}"
      aqara_trv_select_entity: >-
        {% set device_entities = device_entities(aqara_trv_device) %}
        {{ expand(states['select'])   
                  | selectattr('entity_id','in', device_entities)
                  | selectattr('attributes.options', 'contains', 'external')
                  | map(attribute='entity_id') 
                  | first
        }}
      aqara_trv_number_entity: >-
        {% set device_entities = device_entities(aqara_trv_device) %}
        {{ expand(states['number'])   
                  | selectattr('entity_id','in', device_entities)
                  | selectattr('entity_id', 'contains', external_temperature_input_name)
                  | map(attribute='entity_id') 
                  | first
        }}

  - if:
      - condition: template
        value_template: >-
          {{ is_state(external_temp_sensor, "unavailable") or is_state(external_temp_sensor, "unknown") }}
    then:
      - action: select.select_option
        target:
          entity_id: "{{aqara_trv_select_entity}}"
        data:
          option: internal
      - action: system_log.write
        data:
          level: error
          message: External temperature sensor unavailable
          logger: Aqara TRV
      - stop: External temperature sensor unavailable

  - if:
      - condition: template
        value_template: "{{ not is_state(aqara_trv_select_entity, 'external')}}"
    then:
      - action: select.select_option
        target:
          entity_id: "{{aqara_trv_select_entity}}"
        data:
          option: external
      - delay:
          hours: 0
          minutes: 0
          seconds: 10
          milliseconds: 0

  - action: number.set_value
    data:
      value: >-
        {{ (states(external_temp_sensor)|float(0)|round(1)) }}
    target:
      entity_id: "{{aqara_trv_number_entity}}"

Why is my thermostat not on? For some reason, the manufacturer is called LUMINARC and, accordingly, the model is also different, can you tell me how to fix it?

HI, Can two thermostats be connected to one temperature sensor?

@adamkorski yes

I updated ha and the blueprint to the newest version. When i add a new device, no Aquara TRV devices are in the list.

I updated ha and the blueprint to the newest version. When i add a new device, no Aquara TRV devices are in the list.

@Riemi001 Can you try it again. In the newest version it looks like the model string changed. I updated the blueprint

@adamkorski yes

do I have to do two automations or can I add two thermostats in one?

I updated ha and the blueprint to the newest version. When i add a new device, no Aquara TRV devices are in the list.

@Riemi001 Can you try it again. In the newest version it looks like the model string changed. I updated the blueprint

Thanks, it's working again now

I'd like to point out a fatal flaw with this blueprint, especially for people living in countries where heating is seriously expensive:
What happens if the external temperature sensor fails, and its state becomes unavailable or unknown?

In my observation, unavailable or unknown turns into 0 when cast/converted to float using {{ (states(external_temp_sensor)|float(0)|round(1)) }}.
The TRV receives that 0 value, thinks its super cold and opens the valve to 100%, and it stays that way until fixed manually. That actually happened to me while I was out on vacation. That did hurt in my wallet.

Here's a way to fix it. By falling back to the TRV's internal sensor when the external one fails.

actions:
  - variables:
    # ...
  - if:
      - condition: template
        value_template: >-
          {{ is_state(external_temp_sensor, "unavailable") or is_state(external_temp_sensor, "unknown") }}
    then:
      - action: select.select_option
        target:
          entity_id: "{{aqara_trv_select_entity}}"
        data:
          option: internal
      - stop: Temperature sensor failed.
    # ...

I'd like to point out a fatal flaw with this blueprint, especially for people living in countries where heating is seriously expensive: What happens if the external temperature sensor fails, and its state becomes unavailable or unknown?

In my observation, unavailable or unknown turns into 0 when cast/converted to float using {{ (states(external_temp_sensor)|float(0)|round(1)) }}. The TRV receives that 0 value, thinks its super cold and opens the valve to 100%, and it stays that way until fixed manually. That actually happened to me while I was out on vacation. That did hurt in my wallet.

Here's a way to fix it. By falling back to the TRV's internal sensor when the external one fails.

actions:
  - variables:
    # ...
  - if:
      - condition: template
        value_template: >-
          {{ is_state(external_temp_sensor, "unavailable") or is_state(external_temp_sensor, "unknown") }}
    then:
      - action: select.select_option
        target:
          entity_id: "{{aqara_trv_select_entity}}"
        data:
          option: internal
      - stop: Temperature sensor failed.
    # ...

Thanks for pointing out this flaw- I updated the script.