Why not? And if it's power source runs out, the Roomba loses consciousness.
That seems closer to the everyday definition of consciousness most people operate by, than to the hopelessly bikeshed attempts at making it a uniquely human thing.
Humans have a bit more elaborated internal representation of themselves than a Rumba (which doesn't have any. Early versions even had no representation for the room they operate in).
We don’t have point of reference outside of Wall-e to presume a robot is conscious in any way. However a living organism like a plant may experience being.
That seems closer to the everyday definition of consciousness most people operate by, than to the hopelessly bikeshed attempts at making it a uniquely human thing.