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Or you can make a script to save/recall values of all objects mapped to a certain tag. Map this script to a binary object, where ON saves tagged object values and OFF recalls saved values.

Code:

value = event.getvalue()

-- save states
if value then
  objects = grp.tag('my_object_tag')
  store = {}

  for _, object in ipairs(objects) do
    store[ object.address ] = object.data
  end

  storage.set('my_objects', store)
-- restore states
else
  store = storage.get('my_objects', {})

  for addr, value in pairs(store) do
    grp.write(addr, value)
  end
end