Device to locate car location at which floor in a multi storey car park

Device to locate car location at which floor in a multi storey car park

Cancelled

Job Description

I want to invent a device - purpose is to detect which floor is my car parked at, in a multi storey car park (indoor or garage).

I am thinking to make a device so that car owners can put the device in their cars and they could check which floor are their cars parked at by reading another device which he will carry or possibly by an iphone app.

I would welcome better suggestions that can achieve the same purpose.