Home assistant MQTT Statestream to MQTT Discovery blueprint (as of 2021.6)

mqttstream2discover.yaml

blueprint:
  name: MQTT Statestream to MQTT Discovery 2021.03
  description: Creates an MQTT discovery entry for every entity streamed via MQTT Statestream.
  domain: automation
  input:
    ha_stream:
      name: HA stream
      description: The HA statestream topic prefix used

mode: parallel
max: 50

trigger_variables:
  base_topic: !input ha_stream

trigger:
  - platform: mqtt
    topic: "{{ base_topic ~ '/sensor/+/state' }}"
  - platform: mqtt
    topic: "{{ base_topic ~ '/binary_sensor/+/state' }}"
  - platform: mqtt
    topic: "{{ base_topic ~ '/light/+/state' }}"
  - platform: mqtt
    topic: "{{ base_topic ~ '/switch/+/state' }}"
  - platform: mqtt
    topic: "{{ base_topic ~ '/light/+/set' }}"
  - platform: mqtt
    topic: "{{ base_topic ~ '/light/+/set_bri' }}"
  - platform: mqtt
    topic: "{{ base_topic ~ '/switch/+/set' }}"
  
action:
  - variables:
      t: "{{ trigger.topic.split('/') }}"
      root: "{{ t[0] }}"
      domain: "{{ t[1] }}"
      entity: "{{ t[2] }}"
      element: "{{ t[3] }}"

  - choose:
      # Create Sensor discovery config
      - conditions:
          - condition: template
            value_template: "{{ domain == 'sensor' and element == 'state' and 'device_class' in states[domain + '.' + entity].attributes }}"

        sequence:
          - service: mqtt.publish
            data_template:
              topic: "{{ root }}/{{ domain }}/{{ entity }}/attributes"
              payload: '{
                {% for att in states[domain + "."+ entity].attributes %}
                "{{ att }}": "{{ state_attr(domain + "."+ entity, att) }}",
                {% endfor %}
                "mqttstream2discover": "true"
                }'
              retain: true
          - service: mqtt.publish
            data_template:
              topic: "{{ root }}/{{ domain }}/{{ entity }}/config"
              payload: '{
                "uniq_id": "mqtt_{{domain }}_{{ entity }}",
                "name": "{{ entity| replace(''_'', '' '') | title }}",
                "dev_cla": "{{ state_attr(domain + ''.'' + entity, "device_class") }}",
                {% if state_attr(domain + ''.'' + entity, "state_class") != none %}
                  "stat_cla": "{{ state_attr(domain + ''.'' + entity, "state_class") }}",
                {% endif %}
                "unit_of_meas": "{{ state_attr(domain + ''.'' + entity, "unit_of_measurement") }}",
                "stat_t": "{{ root }}/{{ domain }}/{{ entity }}/state",
                "json_attr_t": "{{ root }}/{{ domain }}/{{ entity }}/attributes"
                }'
              retain: true

      # Create Binary Sensor discovery config
      - conditions:
          - condition: template
            value_template: "{{ domain == 'binary_sensor' and element == 'state' and 'device_class' in states[domain + '.' + entity].attributes }}"

        sequence:
          - service: mqtt.publish
            data_template:
              topic: "{{ root }}/{{ domain }}/{{ entity }}/attributes"
              payload: '{
                {% for att in states[domain + "."+ entity].attributes %}
                "{{ att }}": "{{ state_attr(domain + "."+ entity, att) }}",
                {% endfor %}
                "mqttstream2discover": "true"
                }'
              retain: true
          - service: mqtt.publish
            data_template:
              topic: "{{ root }}/{{ domain }}/{{ entity }}/config"
              payload: '{
                "uniq_id": "mqtt_{{domain }}_{{ entity }}",
                "name": "{{ entity| replace(''_'', '' '') | title }}",
                "dev_cla": "{{ state_attr(domain + ''.'' + entity, "device_class") }}",
                "pl_off":"off", "pl_on":"on",
                "state_topic": "{{ root }}/{{ domain }}/{{ entity }}/state",
                "json_attr_t": "{{ root }}/{{ domain }}/{{ entity }}/attributes"
                }'
              retain: true

      # Create Switch discovery config
      - conditions:
          - condition: template
            value_template: "{{  
              domain == 'switch' and 
              element == 'state' }}"

        sequence:
          - service: mqtt.publish
            data_template:
              topic: "{{ root }}/{{ domain }}/{{ entity }}/attributes"
              payload: '{
                {% for att in states[domain + "."+ entity].attributes %}
                "{{ att }}": "{{ state_attr(domain + "."+ entity, att) }}",
                {% endfor %}
                "mqttstream2discover": "true"
                }'
              retain: true
          - service: mqtt.publish
            data_template:
              topic: "{{ root }}/{{ domain }}/{{ entity }}/config"
              payload: '{
                "uniq_id": "mqtt_{{domain }}_{{ entity }}",
                "name": "{{ entity| replace(''_'', '' '') | title }}",
                "pl_off":"off", "pl_on":"on",
                "state_topic": "{{ root }}/{{ domain }}/{{ entity }}/state",
                "json_attr_t": "{{ root }}/{{ domain }}/{{ entity }}/attributes",
                "command_topic": "{{ root }}/{{ domain }}/{{ entity }}/set"
              }'
              retain: true

      # Create Light discovery config
      - conditions:
          - condition: template
            value_template: "{{  
              domain == 'light' and 
              element == 'state' }}"

        sequence:
          - service: mqtt.publish
            data_template:
              topic: "{{ root }}/{{ domain }}/{{ entity }}/attributes"
              payload: '{
                {% for att in states[domain + "."+ entity].attributes %}
                "{{ att }}": "{{ state_attr(domain + "."+ entity, att) }}",
                {% endfor %}
                "mqttstream2discover": "true"
                }'
              retain: true
          - service: mqtt.publish
            data_template:
              topic: "{{ root }}/{{ domain }}/{{ entity }}/config"
              payload: '{
                "uniq_id": "mqtt_{{domain }}_{{ entity }}",
                "name": "{{ entity| replace(''_'', '' '') | title }}",
                "pl_off":"off", "pl_on":"on",
                "bri_stat_t": "{{ root }}/{{ domain }}/{{ entity }}/brightness",
                "bri_cmd_t": "{{ root }}/{{ domain }}/{{ entity }}/set_bri",
                "state_topic": "{{ root }}/{{ domain }}/{{ entity }}/state",
                "json_attr_t": "{{ root }}/{{ domain }}/{{ entity }}/attributes",
                "command_topic": "{{ root }}/{{ domain }}/{{ entity }}/set"
              }'
              retain: true
      # Command for Switch & Light 
      - conditions:
          - condition: template
            value_template: "{{  
              (domain == 'light' or domain == 'switch') and 
              element == 'set' }}"

        sequence:
          - service: '{{ domain }}.turn_{{trigger.payload | lower }}'
            data_template:
              entity_id: '{{ domain }}.{{ entity }}'

      # Command for Light brightness
      - conditions:
          - condition: template
            value_template: "{{  
              domain == 'light' and 
              element == 'set_bri' }}"

        sequence:
          - service: 'light.turn_on'
            data_template:
              entity_id: '{{ domain }}.{{ entity }}'
              brightness: '{{trigger.payload | int }}'

    default:
      - event: noop
      

Update for non-existing state_class