configure.yaml

config.yaml 
# Sensors 
sensor:
  - platform: rest
    # x.x.x.x with local ip of stove
    resource: http://x.x.x.x/get_stove_data 
    method: GET
    name: HWAM
    value_template: '{{ (value_json.stove_temperature | float / 100) | round(0) }}'
    json_attributes:
      - phase
      - new_fire_wood_hours
      - new_fire_wood_minutes
      - burn_level
      - operation_mode
      - maintenance_alarms
#      - version_major
#      - version_minor
#      - version_build
#      - remote_version_major
#      - remote_version_minor
#      - remote_version_build
      - stove_temperature
      - room_temperature
      - oxygen_level
      - valve1_position
      - valve2_position
      - valve3_position
      - algorithm
      - doorOpen  
  - platform: template
    sensors:
      hwam_phase:
        friendly_name: 'Brændeovn faser'
        icon_template: mdi:book-open
        value_template: '{{ states.sensor.hwam.attributes["phase"] }}'   
      hwam_burn_level:
        friendly_name: 'Brændeovn level'
        icon_template: mdi:spirit-level
        value_template: '{{ states.sensor.hwam.attributes["burn_level"] }}'     
      hwam_operation_mode:
        friendly_name: 'Brændeovn mode'
        icon_template: mdi:book-open
        value_template: '{{ states.sensor.hwam.attributes["operation_mode"] }}'     
      hwam_stove_temperature: 
        friendly_name: 'Brændeovn temperatur'
        icon_template: mdi:fireplace
        unit_of_measurement: '°C'
        value_template: '{{ (states.sensor.hwam.attributes["stove_temperature"] | float / 100) | round(0) }}'         
      hwam_room_temperature: 
        friendly_name: 'Brændeovn rum temperatur'
        icon_template: mdi:home-thermometer-outline
        unit_of_measurement: '°C'
        value_template: '{{ (states.sensor.hwam.attributes["room_temperature"] | float / 100) | round(0) }}'
      hwam_valve1_position:
        friendly_name: 'Brændeovn ventil 1'
        icon_template: mdi:valve
        value_template: '{{ states.sensor.hwam.attributes["valve1_position"] }}'          
      hwam_valve2_position:
        friendly_name: 'Brændeovn ventil 2'
        icon_template: mdi:valve
        value_template: '{{ states.sensor.hwam.attributes["valve2_position"] }}'
      hwam_valve3_position:
        friendly_name: 'Brændeovn ventil 3'
        icon_template: mdi:valve
        value_template: '{{ states.sensor.hwam.attributes["valve3_position"] }}'
      hwam_oxygen_level:
        friendly_name: 'Brændeovn oxygen'
        icon_template: mdi:molecule-co2
        unit_of_measurement: '%'
        value_template: '{{ states.sensor.hwam.attributes["oxygen_level"] }}'