How to declare Xiaomi aquara temperatur sensor with zigbee2mqtt?

Configuration
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8

Meanwhile I have changed to a docker setup. Here as example my docker-compose.yaml:

  zigbee2mqtt:
    container_name: zigbee2mqtt
    image: koenkk/zigbee2mqtt
    depends_on:
      - mqtt
    volumes:
      - /home/hajo/docker-volumes/zigbee2mqtt/data:/app/data
    devices:
      - /dev/serial/by-id/usb-Texas_Instruments_TI_CC2531_USB_CDC___0X00124B00193648CA-if00
    restart: unless-stopped
    network_mode: host
    environment:
      - TZ=Europe/Berlin
      #- DEBUG=zigbee-herdsman*

My zigbee2mqtt configuration.yaml looks like this:

homeassistant: true
permit_join: true
mqtt:
  base_topic: zigbee2mqtt
  server: 'mqtt://192.168.178.3'
serial:
  port: >-
    /dev/serial/by-id/usb-Texas_Instruments_TI_CC2531_USB_CDC___0X00124B00193648CA-if00
devices:
  '0x00158d0002b51ffff':
    friendly_name: XiaomiAqara-1
    retain: true
  '0x00158d00025effff':
    friendly_name: XiaomiAqara-2
    retain: true
  '0x00158d0002e2ffff':
    friendly_name: XiaomiSmart-1
    retain: true

With this my sensors are detected. But I want to correct some measured values and round the results. Therefore I still have defined the sensors in the sensors.yaml file; I haven’t found another way to correct or round. But unfortunately this creates new sensors and I’ve asked, if this is the best way.

# Xiaomi Temperatur-, Luftfeuchtigkeits und Luftdruck-Sensor #1
# Terrassse
  - platform: mqtt
    name: "XiaomiAqara-1 Temperature"
    state_topic: "zigbee2mqtt/XiaomiAqara-1"
    unit_of_measurement: '°C'
    value_template: "{{ value_json.temperature | round(1) }}"
    availability_topic: "zigbee2mqtt/bridge/state"
    device_class: "temperature"

  - platform: mqtt
    name: "XiaomiAqara-1 Humidity"
    state_topic: "zigbee2mqtt/XiaomiAqara-1"
    unit_of_measurement: '%'
    value_template: "{{ (value_json.humidity - 0.2) | round(0) }}"
    availability_topic: "zigbee2mqtt/bridge/state"
    device_class: "humidity"

  - platform: mqtt
    name: "XiaomiAqara-1 Pressure"
    state_topic: "zigbee2mqtt/XiaomiAqara-1"
    unit_of_measurement: 'hPa'
    value_template: "{{ (value_json.pressure + 9.0) | round(0) }}"
    availability_topic: "zigbee2mqtt/bridge/state"
    device_class: "pressure"
    
  - platform: mqtt
    name: "XiaomiAqara-1 Battery"
    state_topic: "zigbee2mqtt/XiaomiAqara-1"
    unit_of_measurement: '%'
    value_template: "{{ value_json.battery }}"
    availability_topic: "zigbee2mqtt/bridge/state"
    device_class: "battery"
    
  - platform: mqtt
    name: "XiaomiAqara-1 Voltage"
    state_topic: "zigbee2mqtt/XiaomiAqara-1"
    unit_of_measurement: 'V'
    value_template: "{{ value_json.voltage | multiply(0.001) | round(2) }}"
    availability_topic: "zigbee2mqtt/bridge/state"

  - platform: mqtt
    name: "XiaomiAqara-1 Linkquality"
    state_topic: "zigbee2mqtt/XiaomiAqara-1"
    unit_of_measurement: '%'
    value_template: "{{ value_json.linkquality }}"
    availability_topic: "zigbee2mqtt/bridge/state"

  - platform: template
    sensors:
      xiaomiaqara_1_last_changed:
        value_template: >
          {% set values = [
            states.sensor.xiaomiaqara_1_temperature.last_changed,
            states.sensor.xiaomiaqara_1_humidity.last_changed,
            states.sensor.xiaomiaqara_1_pressure.last_changed,
            states.sensor.xiaomiaqara_1_linkquality.last_changed,
            states.sensor.xiaomiaqara_1_voltage.last_changed,
            states.sensor.xiaomiaqara_1_battery.last_changed, ] %}
          {{ values | max }}
        device_class: timestamp