knx_select_exposure.yaml

blueprint:
  name: KNX Select
  description: "# \U0001F3E0 KNX Select Exposure\nConnect a Home Assistant Select or Input Select to a knx decimal value\n
  The selected Entity will be exposed to the knx bus. Read requests will be processed on the state address and to change the
  value of the select, you can send a write telegram to the select address. The adresses should use DPT 5.005 and the index
  of the select will be used to set the value. No further translation will be done."
  author: richardpolzer
  domain: automation
  input:
    select_entity:
      name: Select entity
      description: >
        Select to publish to KNX
      selector:
        entity:
          filter:
            domain:
              - select
              - input_select

    select_address:
      name: Select group address
      description: >
        Group address for the select. DPT 5.005
        Example: '1/0/1'
    select_state_address:
      name: Select state group address
      description: >
        Group address for publishing the state to. DPT 5.005
        Example: '1/0/1' (leave empty if unused)
      default: ""

mode: parallel
max_exceeded: silent

variables:
  select_entity: !input select_entity
  select_address: !input select_address
  select_state_address: !input select_state_address

trigger:
  - platform: homeassistant
    event: start
    id: "initialize"
  - platform: event
    event_type: automation_reloaded
    id: "initialize"
  - platform: event
    event_type: event_knx_reloaded
    id: "initialize"
  - platform: event
    event_type: service_registered
    event_data:
      domain: knx
      service: event_register
    id: "initialize"
  - platform: event
    event_type: knx_event
    event_data:
      destination: !input select_address
      telegramtype: GroupValueWrite
      direction: Incoming
    id: "select_address"
  - platform: event
    event_type: knx_event
    event_data:
      destination: !input select_state_address
      telegramtype: GroupValueRead
      direction: Incoming
    id: "select_state_address"
  - platform: state
    entity_id:
      - !input select_entity
    id: "state_change"

action:
  - choose:
      - conditions:
          - condition: trigger
            id: "initialize"
        sequence:
          - if:
              - condition: template
                value_template: "{{ select_address != '' }}"
            then:
              - service: knx.event_register
                data:
                  address: "{{ select_address }}"
                  type: decimal_factor
          - if:
              - condition: template
                value_template: "{{ select_state_address != '' }}"
            then:
              - service: knx.event_register
                data:
                  address: "{{ select_state_address }}"
      - conditions:
          - condition: trigger
            id: "select_address"
          - condition: template
            value_template: "{{ select_address != '' }}"
        sequence:
          # change the input select here HA
          - service: "{{select_entity.split('.')[0]}}.select_option"
            target:
              entity_id: !input select_entity
            data:
              option: "{{ state_attr(select_entity,'options')[trigger.event.data.value | int(default=0)] }}"
      - conditions:
          - condition: or
            conditions:
              - condition: trigger
                id: "select_state_address"
              - condition: trigger
                id: "state_change"
          - condition: template
            value_template: "{{ select_state_address != '' }}"
        sequence:
          #report the current value here
          - service: knx.send
            data:
              address: "{{ select_state_address }}"
              payload: "{{state_attr(select_entity,'options').index(states(select_entity))}}"
              type: decimal_factor
              response: "{{trigger.id == 'select_state_address'}}"