
A friend of mine asked me for help in a project he's trying to implement and that would use RFID tags to track the location of a group of people inside a building.
My knowledge of RFID is purely theoretical, so... I'd like your advice on it.
What would be the best kind of rfid tags and receivers, so that the location of each people could be known.
(In a worst case scenario, there could be over 20 or 30 people inside a single room)
Being able to estimate the distance between each tag and the receiver might also be interesting - but not exactly required.
Thanks.