Shelly 1 state without changing the relay

Configuration
3

It’s very easy. You have to change button type to detached switch and power on default mode to on in Shelly configuration.
In HA you have to move your smart bulb entity to the frontend (to turn on/of the light manually) and add automation:

- id: smart_bulb_toggle
  alias: 'Smart Bulb Toggle'
  trigger:
    - platform: state
      entity_id: binary_sensor.shelly_input_entity
      from: 'off'
      to: 'on'
  action:
    service: light.toggle
    entity_id: light.your_smart_bulb_entity

This is for momentary switch. If you have non-momentary switch:

- id: smart_bulb_turn_on
  alias: 'Smart Bulb Turn On'
  trigger:
    - platform: state
      entity_id: binary_sensor.shelly_input_entity
      from: 'off'
      to: 'on'
  action:
    service: light.turn_on
    entity_id: light.your_smart_bulb_entity

- id: smart_bulb_turn_off
  alias: 'Smart Bulb Turn Off'
  trigger:
    - platform: state
      entity_id: binary_sensor.shelly_input_entity
      from: 'on'
      to: 'off'
  action:
    service: light.turn_off
    entity_id: light.your_smart_bulb_entity

Of course you have to add binary_sensor.shelly_input to HA configuration. If you use my Shellies Discovery script it is already in HA.

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