"Dummy/Stub" or Mocked-up Entity Creation

I am looking for a way to create dummy entities for motorized window shades. I want to start working on a dashboard for a new home we are moving into that will have 10 power blinds/shades. I don’t have any of the devices currently as they will be installed along with the home build. I would like a way to mock-up an entity with attributes so that I can design the look and feel of a dashboard. Then when I move I would just change the entity names and I should have a working dashboard on day one.

I have posted this request in several other community forums and have not received a good answer so I assume this functionality does not currently exist.

I create “virtual devices” with 2 “helpers”:

# configuration.yaml

# https://www.home-assistant.io/integrations/input_boolean/
input_boolean:
  virtual_window:
    name: Virtual Window
    icon: mdi:window-closed

# https://www.home-assistant.io/integrations/template/
template:
  # https://www.home-assistant.io/integrations/binary_sensor/
  - binary_sensor:
    - unique_id: virtual_window
      name: Virtual Window
      device_class: window
      state: "{{ is_state('input_boolean.virtual_window', 'on') }}"

You could use opening device_class or whatev for your mock.

Thanks. I will give this a try.

Looks like this worked. I have the virtual entities now. Now time to use them in a dashboard.

Thanks.