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  • skjha2k commented on tronixstuff's instructable Arduino Tutorial - Numeric Keypads2 years ago
    Arduino Tutorial - Numeric Keypads

    Hi glharrisjr , could you sol ve your problem?I am facing the similar problem.

    solved. use "const char" instead of char for the following linechar PIN[6]={ '1','2','A','D','5','6'}; // our secret (!) numbernow the update code will beconst char PIN[6]={ '1','2','A','D','5','6'}; // our secret (!) number

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