In the project of guiding a sight disabled person in a known environment, we need to have a precise way of figuring out where the user is. Our current solution is to use WPS.
This is however our first project with Arduino, and we're not quite sure if we're going the right way about this. We're thinking of getting a compass component and such, but is there something we should know before advancing further in the project?
EDIT: Additional information. The system is placed on the user, most probably strapped to the arm. The communication to the Wi-Fi beacons will be done from there, as well as the calculations.
The environment is supposed to be as complex as an exposition hall, but we can aim higher.
Budget range is around $100, Arduino itself excluded. A UNO is already provided to us.