Topic: Matrix keypad
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Oct 08, 2017, 08:02 pm
Has anyone else had trouble using the 4 x 3 keypad with one of its pins defined as d13.
It works fine if you use any pins other than 13. I know pin 13 is tied to on board LED and didn't know if that was issue.
I was wanting to use sensor shield because it has nice plug style connectors for i2c to my LCD, and enclosed pin header for d7 - d13. Just seemed convenient but will use jumpers if need be.
Any help is appreciated