I’m trying to make something that I can use for sevelar different projects, but am having some trouble discovering HOW to do it.
So, the idea is to create some sort of board I could use for multiple purposes, and am trying to figure out the best way to implement it.
Having several different pieces and a board divided up in squares, what I need is to be able to identify WHICH piece is placed on the board, and where (wirelessly, of course). I originally thought of using rfid, with which I would be able to easily identify the pieces and, if I managed to have one reader per square, placement too. Using the Wiegand26 format I would be able to connect to regular arduino pins, so no problem in having several readers. Main problem would be interference between readers, so I would have to use either a huge board or small range readers. I found some 25mm rfid readers with 2-4cm range which would be perfect, but at $39 a piece, it’s not a possibility… :mrgreen:
I read around here somewhere on the arduino forum of a way of having a single reader identify multiple rfid cards/keys, but that wouldn’t take care of the placement detection, just the identification of the pieces…
The idea would be to keep it simple at first, with around 12 different pieces and a 4x4 board. 5x5 maximum.
So, after several days searching around for a feasible solution I have arrived to the conclusion that maybe rfid isn’t the best way to do it, and am asking for ideas, input or guidance. There’s probably a really easier way of doing I’m just not thinking about! 
Any help is deeply appreciated! 