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Panda 2 + Button Matrix


I’m trying to get the Button Matrix from the wiki ( to work with my Panda 2, but I’m not having any luck. Is there a schematic for a 3x3? I’m not sure how to wire it, using AN 0-2 for row select, AN 3-5 for column.



First hit on google image search


I see your post is a month old. Did you resolve this? I just completed a 4x4 key matrix project - I don’t know where I got the keypad - it works fine now but I struggled for a while. It is a resource beast - 4 digital pins for rows and another 4 for columns. This prompted me to move to the Panda 2, wasteful I know. Let me know if you need help.