Hello. I have a problem with my nodemcu 3.0 esp8266 and my keypad. For some reason, the last cable does not work. 3 and # are incorrect, and the 3 blocks the whole pressing unless I press 1 or 2 again. 1 2 1 2 4 5 6 7 7 8 9 0 3 and # are also mixed with 1 and * /* @file HelloKey…

Problem with nodemcu 3.0 esp8266 and keypad 3x4

StefanL38 January 21, 2024, 8:13pm 2

You can't use all IO-pins for all purposes.
Read this tutorial to understand what IO-pins to choose

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