mlego/m8 8 keys 4x2, eink, encoder clickable(optional) and led strip (optionally), qmk firmware xiao rp2040 (2x74HC595 1X74HC589) test board
mlego/m4 4 keys 2x2, encoder clickable(optional) and led strip (optionally), qmk firmware xiao rp2040 test board, matrix, shift registers