2022-01-11 (Tu) EWC_Panel Recognizing inputs

I wasn't sure I connected my button array correctly, so I grabbed one of the spare and confirmed its operation with a multimeter. After some experimenting, I figured out that I had to declare half of the pins as OUTPUT before grounding them, then I could look for a ground signal on the other four pins, which had to be declared INPUT_PULLUP. The next issue was that I used pin 13 for one of the wires, which had an LED installed, so I moved the wire to another input. My function reports a two-digit number where the first digit is the row (1-4), and the second digit is the column (1-4). I tried to record the numbers as an array to track rising and falling edges, but I opted to look at the integer and react when a new input arrived. For now, all the sketch does is report the button name.
Rising edge button recognition

The rest of the posts for this project have been arranged by date.
First time here?

Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8

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