so the project uses a keypad where if you type a certain number code (in this case 4357) you click on the button, and the particle photon sends a message that you Need Help. However, I keep getting an error and I don't know why. #include <Keypad.h> const byte ROWS = 4; //four rows const byte COLS…

Particle Photon: Am I Using it Correctly?

ieee488 April 23, 2018, 12:44am 2

what error?

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