sync_trv_with_external_sensor.yaml

# TRV Temperature Calibration Blueprint
# Updated for zigbee2mqtt versions where current_temperature includes calibration offset

blueprint:
  name: Temperature Calibration
  description: Temperature calibration for Zigbee valve TS0601
  domain: automation
  input:
    valve:
      name: Smart Valve
      selector:
        entity:
          domain: climate
    temp_sensor:
      name: External Temperature Sensor
      selector:
        entity:
          domain: sensor
          device_class: temperature
    calibration_entity:
      name: Calibration Entity
      description: The number entity for local_temperature_calibration
      selector:
        entity:
          domain: number

variables:
  valve: !input valve
  temp_sensor: !input temp_sensor
  calibration_entity: !input calibration_entity
  
  # Minimum change needed to update calibration
  calibration_threshold: 0.25
  # Maximum calibration offset allowed (±5°C)
  max_calibration: 5.0        
  # Get current values
  external_temp: "{{ states(temp_sensor) | float(0) | round(1) }}"
  current_calibration: "{{ states(calibration_entity) | float(0) | round(1) }}"
  # IMPORTANT: current_temperature now INCLUDES the calibration offset
  # So we need to subtract it to get the raw TRV sensor reading
  current_temp_with_calibration: "{{ state_attr(valve, 'current_temperature') | float(0) | round(1) }}"
  trv_raw_reading: "{{ (current_temp_with_calibration - current_calibration) | round(1) }}"
  # Calculate the new calibration needed (rounded to 0.5°C increments)
  # New calibration = External temp - Raw TRV reading
  new_calibration: "{{ ((external_temp - trv_raw_reading) * 2) | round(0) / 2 }}"
  # Calculate how much the calibration would change
  calibration_change: "{{ (new_calibration - current_calibration) | abs | round(2) }}"

trigger:
  - platform: time_pattern
    minutes: "/10"

condition:
  - condition: and
    conditions:
      # Ensure all required data is available
      - condition: template
        value_template: "{{ states(temp_sensor) not in ['unavailable', 'unknown', '', 'none'] }}"
      - condition: template
        value_template: "{{ states(calibration_entity) not in ['unavailable', 'unknown', '', 'none'] }}"
      - condition: template
        value_template: "{{ state_attr(valve, 'current_temperature') not in [none, 'unavailable', 'unknown'] }}"

action:
  - if:
    - condition: template
      value_template: "{{ calibration_change >= calibration_threshold }}"
    - condition: template
      value_template: "{{ new_calibration | abs <= max_calibration }}"
    then:
      - service: number.set_value
        target:
          entity_id: "{{ calibration_entity }}"
        data:
          value: "{{ new_calibration }}"

Just a note: in Z2M 2.0 local_temperature already includes local_temperature_calibration, so the old blueprint would start oscillating calibration value over time. Updated version accounts for that and also uses dedicated calibration number entity, as local_temperature_calibration is no longer a state in climate entity.