Designed to be low cost, Arduino Pro Mini Very cheap compact postage size Arduino. driving I2C OLED Display
Project showcase by MaxChess
Arduino & Rapberry Pi based chess computer that uses Stockfish ,recognises piece positions using reed switches and signals its move
Sorry for the delay. On Point 1. you know when a piece is lifted, so you record that, then you use "anti-bouncing" techniques to wait for the final position. for example if you delay half a second before recording the final position, then most drags get ignored.
Point 2. Similar technique to the above. You wait for all sensible moves to be completed before deciding what you have got. If moves are always a lift (reed closes) or a place (reed opens).
Then Lift - Place is a completed move to an empty square.
On Whites move: Lift (white) - lift (Black) and Lift (Black), Lift (White) must both be white taking black, which should be confirmed by Place(white) from the Lift(Black) square
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