Basically what I want to do is to have a device (i.e. a box with 4 LED indicator arrows) which indicates where a certain person.
I'm not sure how to accomplish this, my idea so far is to have the person carry around a GPS receiver (hooked up to an Arduino?), and the indicator box to receive those coordinates somehow (how?). I'm guessing the indicator box must also have a GPS receiver, so then the coordinates can be compared and the LEDs on the indicator box can display where to go in order to locate the person of interest.
Am I on the right track? Is there a way for both GPS modules to communicate with each other?
Thank you in advance!