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by medelec35
Tue Jan 08, 2013 9:54 pm
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Re: More advanced LCD Four Digit Door Lock.

No problem Dan, Not sure how good it is, but I did an alarm system with enable/disable different zones. See: http://www.matrixmultimedia.com/mmforums/viewtopic.php?f=29&t=6583 This was created in 2009 so It may not be that good? Here is burgler another alarm http://www.matrixmultimedia.com/mmfor...
by medelec35
Mon Jul 09, 2018 1:33 pm
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Re: More advanced LCD Four Digit Door Lock.

Hi Derrihj,
That sounds like it's hardware related to the keypad.
Have you included the resistors as shown in the Keypad datasheet?
Also check continuity between keypad and microcontroller and the connections within flowchart match hardware.

Can you post the full circuit if still facing issues?